Very slight infection occurred in NPK+ZnSO4+Gypsum, PK+ZnSO4, MOC (ghani) treated plants. Guava (Pisidium guajava L.) is a common and important fruit crop in Bangladesh. A total of 10 diseases have been reported on guava in Bahgladesh (Meah and Khan,1987).Arnong the guava diseases anthracnose caused by Colletotrichum gloeosporioides Penz. Johnst), gets more attention and is the most commonly observed disease that can affect young developing flowers, fruit and has been reported in all guava-growing areas around the world (Kumar et al., 2007). Neem oil spray is an organic, multi-purpose fungicide/insecticide/miticide that kills eggs, larvae and adult stages of insects as well as prevents fungal attack on plants. Based on the above discussion it is evident that soil amendments with manures and fertilizers caused marked effects on guava fruit anthracnose infestation when no disease developed. Minimum (0.24-0.4%) surface area diseased was observed in PK+ZnSO4 and NPK+ZnSO4+Gypsum treatments. It is a matter to be looked into that how the management practices work under heavy disease intensity and favorable weather. How to Control Anthracnose. The experiments were conducted at Bangladesh Agricultural University Campus, at Mymensingh, Bangladesh during 1992-93 in two guava seasons- main season (April-August) and the minor (off) season (October-February). MOC (ghani) and cowdung+MOC (ghani) caused 3.2 and 2.8% respectively. Soil amendments: Soil amendments by organic manures and inorganic fertilizers were applied separately and in combination during early May and late October 1992. For this purpose, only ripe ‘Kumagai’ guavas were treated with 1 μmol∙L−1 MJ, inoculated 48 h after MJ treatment had started. More promising result (99% over control) was found in the present study spraying rovral wp without using sticker. The prevalence of guava (Psidium guajava L.) fruit anthracnose was surveyed in three major guava‐producing areas of Bangladesh during 1987 and 1988. Probably, the success may be attributed to low disease incidence in the experimental site during the study period. Weights of fruits selected for estimation of disease severity were also recorded after harvest. In another case B was less effective than Mn but both the elements reduced the disease significantly. The control of anthracnose (Colletotrichum simmondsii) during the post-harvest stage in guava fruits (Psidium guajava L.) was performed by the application of phosphites [phosphite-K (40% P2O5 and 30% K2O) and phosphite-Ca (10.7% P2O5, 3.89% Ca, and 0.5% B)] including the Carbendazim as reference, calcium chloride (CaCl2), acetyl salicylic These results do not support the findings of the present study that anthracnose infection was totally impaired in MP amended plants. Spraying of Zn reduced the deficiency problem in plants and might have given best satisfactory effect (100% over control) in the reduction of disease. The application of chemicals is the preferred treatment for best results at keeping the mango trees healthy and productive. Guava (Pisidium guajava L.) is a common and important fruit crop in Bangladesh.But guava plants are susceptible to many fungal diseases. For trees, prune out the dead wood and destroy the infected leaves. The non-infected guava fruit was significantly higher than the anthracnose infected guava fruit in carbohydrates, crude fibre, ash, fat, protein, Ca, Fe and P. The methods and evaluations were the same described in the first experiment. Incidence of fruit anthracnose on different guava varieties during the main season (non-sprayed), Figures in the column having same letters do not differ significantly at p = 0.01, Severity (% fruit infection) of guava fruit anthracnose under fungicide spray gradient, Average fruit weight and % fruit weight loss in four varieties of guava under fungicide spray gradient, https://scialert.net/abstract/?doi=pjbs.2000.1234.1236, Relation between anthracnose disease level and percent fruit weight loss in four varieties of guava. 1). In other treatments fruit infections were reduced gradually with time comparatively more readily with PK+ZnSO4 and NPK+ZnSO4+ Gypsum and less slowly with cowdung+MOC (ghani) and MOC (mill) (Fig. non-infected guava fruit was significantly higher than the anthracnose infected guava fruit in carbohydrates, crude fibre, ash, fat, protein, Ca, Fe and P. A significant reduction in the price of guava was found associated with anthracnose infected fruits in all the 3 major market surveyed. All the sprayed plants received a recommended basal dose of NPK before start of spraying schedule. Mango, Avacado, Lychee, Longan, - Duration: 7:46. Two approaches-i) soil amendment with organic manures and inorganic fertilizers and ii) foliar spray of fungicides and essential minor elements were designed. Deshi fruits realized minimum loss whereas Kazipeyara had the more loss. 2). Treating for anthracnose is much like any fungal turf disease, but it is important to understand when and how to treat for this turf fungus. an important fruit of subtropical countries is affected by about 177 pathogens of which, 167 are fungal, 3 bacterial, 3 algal, 3 nematodes and one epiphyte. Hazardous effect of chemicals, their high price and market availability give the scope to think of alternatives. Regression coefficients in both cases were highly significant. It has been reported in all guava-growing areas around the world where high rainfall and humidity are present. In this study cowdung produced no disease and MOC (ghani) produced slight disease infection when applied singly. Foliar spray: All the spray treatments significantly reduced fruit infection over control. Similar observations were observed in fruit surface area infection except that rovral produced lower surface area infection (0.8%) than manganese (0.1%) treatment (Table 2). So anthracnose disease of guava is a serious problem in Bangladesh, especially for the commercial producers. MOC: Mustard Oil Cake, SOC: Sesame Oil Cake, TSP: Triple Super Phosphate, MP: Muriate of Potash. Boron spray gave poorer results in comparison to all other treatments. And this might be one of the factors promoting pathogen growth at maturity of the fruits and not when it was young or immature (Sastry, 1965). Urea, gypsum, cowdung+SOC and SOC produced highest (4.8-6.8%) surface area infection among all other treatments with SOC supporting the highest. Guava fruit anthracnose as affected by soil amendments with various treatment showing their rate of application, percent fruit infection and per cent fruit surface area diseased at 60 days after treatment, Plants in the same plot receiving no treatment served as control. Similar observations have been reported by Malraja (1990) in spraying of Zn, Cu, Mn, Mg and Fe that reduced the incidence of disease of which Cu spray recorded least incidence of fruit rot in chilli. Fruit were evaluated daily for incidence and severity of anthracnose. The whole surface of the plant including both surface of the leaves, buds, twigs, fruits and branches were well sprayed with the suspension of fungicides and minor elements. Statistically the effect of Cowdung+MOC (ghani) was similar to NPK+ZnSO4+Gypsum although cowdung+MOC (ghani) applied plants showed more disease. The fungicide namely Tilt [Propiconazole = 1-2-(2,4-DichlorophenyI)-4-propyl 1,3-dioxalen-2-Elmethyl 1 H-1, 2,4-Triozolel at a single standard rate (0.2%) was applied to guava plants at 10 day intervals for 0, 1, 2, 3, 4, 5 or 6 times to create infection gradient. In another report Midha and Chohan (1970) described that Colletotricum gloeosporioides showed no significant response up to a concentration of 0.7% of KCl. Four varieties and 7 treatments (0, 1, 2, 3, 4, 5, 6 sprays) constituted the 2- factorial experiment. Manures also supply all of the essential major and minor elements. Results were very promising from the point of environmentally friendly control of guava fruit anthracnose. Significant means were compared employing DMRT. Tilt and rovral were sprayed at the commercial rates (0.2%). Severely anthracnose infected fruits become fully unfit for consumption and lose food value and market price. High doses of nitrogen cause succulence of the plant and due to this disease incidence increase. For complete disease suppression, five sprays were required in Kazipeyara whereas in other varieties two sprays were sufficient (Table 2). Urea and TSP had less effect over disease development when these were used singly. Lukade and Rane (Lukade and Rane, 1994) reported that application of N in combination with phosphorus was found effective in reducing the root rot of safflower and when these inorganic amendments applied singly, they were ineffective against root rot disease. Fruit area infections of randomly selected 5 fruits per plant were recorded. However cultural practices alone can not be an effective step. Rovral also gave significantly better result against the disease. All of the above studies had done in in vitro. These factors might have helped in improving plant health and thereby reduced the disease incidence (Tamhani et al., 1970). Reports of successful chemical control of the disease are available (Hossain, 1993; Hossain and Meah, 1992; Kabir and Meah, 1987; Midha and Chohan, 1972; Pathak, 1986; Raghavan and Saksena, 1978; Rahman and Hossain, 1988; Tandon and Singh, 1969). Rawal (1993) used multilinear regression for assessment of relation between guava fruit weight loss and incidence of fruit rots caused by Colletotrichum gloeosporioides and other fungi. Manganese, boron, and zinc were sprayed at the rate of 1000, 500 and 2000 ppm respectively. The relation between disease level (% fruit infection) and per cent fruit weight loss was positively correlated and significant linear regression was obtained in all the varieties (Fig. Values are average of five replications with two seasons. Significant response was increased in the growth at low levels of KCl. Cowdung produced no disease singly and perhaps it suppressed the effect of SOC. Guava Page: Anthracnose Caused by the pathogen Colletotrichum gloeosporioides Anthracnose is the most commonly observed disease that affects both pre- and postharvest management of guava. On the other hand, untreated plants experienced higher fruit infections with time (Fig. But this has not been tried in case of guava anthracnose. Nitrogen enhances the development of guava anthracnose. The experiments were conducted to explore the possibility of integration of various approaches for control of guava anthracnose during fruiting seasons, 1992-93. Estimation of yield loss: Under unsprayed condition in all the varieties, reduced fruit weight was obtained. Use a knife that is disinfected before each cut. Patel and Pathak (1993) reported 6.6% of guava fruit weight loss and incidence of fruit rots caused by Colletotrichum gloeosporioides and other fungi. • Effective control of anthracnose can be achieved by sprays of Bordeaux mixture (3:3:50) at 7 days interval. Stem canker and dry fruit rot. Guava fruit weight loss owing to anthracnose (Colletotrichum gloebsporioides) severity was estimated on the basis of critical point model. This phenomenon continued until no fruit weight loss occurred at the end of 5 sprays when virtually no fruit infection occurred. On an average 9.2% fruits in untreated plants were infected (Table 1). Many commercial producers think to give up the cultivation of guava owing to a great loss by the disease. All of the mentioned minor elements are essentially required for plants. This disease can cause considerable postharvest losses and can affect young developing flowers and fruit. Probably the combination was incompatible for disease control rather it might have produced another reaction (unknown) for which disease incidence increased. The treatments with their doses are shown in Table 1. They found oil cake increased the disease severity while high dose of NPK reduced it. Gradient of fruit anthracnose severity was created through varied levels of fungicide spray. This is also a fungal disease that affects the fruit and growth … Sarupkatti had higher infection than Mukundpuri but less than Deshi (Table 1). Therefore, in total 84 plants were used. Similarly spray of fungicides and minor elements especially tilt, rovral and zinc had profound effects on anthracnose infestations. Soil amendments: Per cent fruit infected with anthracnose in the untreated plants were significantly higher than in the treated plants (Table 1). Save your trees! Colletrotrichum gloesporiodies is the causal agent of anthracnose in guava, and proliferates during the storage period. Minor elements, Zn, Mn, and B spray gave significant reduction … Symptoms Yield loss was estimated on the basis of critical point model calculated through simple regression. In the absence of NPK, plants become weak and at this condition gypsum would not be able to resist the disease singly (Ferdous, 1990). Anthracnose is a fungal disease that affects plants by forming dead areas on leaves and fruit. However effect of all treatments were statistically similar. Pathogen incidence and fruit weight were positively correlated with fruit rots. TSP, Cowdung+MOC (ghani) were less effective and urea, gypsum, cowdung+SOC and SOC were ineffective. One single plant was treated as one experimental unit, i.e., in a single plant no two chemicals or minor elements were applied. Data on fruit anthracnose severity were analysed statistically following PDI (Percent Disease Index) calculation: The data were subject to Arcsine transformation and F-test. Therefore steps are required to protect this palatable and highly nutritious fruits from the menace of anthracnose. … This disease can cause considerable postharvest losses and can affect young developing flowers and fruit. Among the treatments cowdung, MOC (mill), MP, ZnSO4, Cowdung+MOC (mill), K+ZnSO4 significantly reduced fruit infection followed by MOC(ghani), cowdung+MOC (ghani), PK+ZnSO4 and NPK+ZnSo4+Gypsum. UH–CTAHR Mango Anthracnose (Colletotrichum gloeosporioides) PD-48 Aug. 2008 Mango anthracnose symptoms on fruits Above, a basket of anthracnose-diseased mango fruits at a farmer’s market in Hilo, Hawai‘i. Abstract. Guava will grow optimally between 23 and 28°C (73–82°F) but established trees can tolerate short periods at -3 to -2°C (27-28°F) although temperatures below 15°C (60°F) can cause the tree to cease producing fruit. Deficiency of any one of the above elements makes plants vulnerable to disease. These results are very much promising from the view point of non-chemical control of guava fruit anthracnose. Physalopara psidii Stevens &Pierce and Diplodia netalensis Evans. MOC and SOC were decomposed in water for 3 days before application. Disease severity was low during the experimental period, perhaps because of low inoculum pressure or unfavorable weather. It can attack many different types of plants, from grasses to flowering trees such as dogwood. MISCELLANEOUS: GUAVA - ANTHRACNOSE, RED ALGAE (NOT PERMITTED IN CA) General Information GENERAL INFORMATION CS 2005 IS A COPPER SULFATE PENTAHYDRATE FORMULATION USED TO CONTROL BACTERIA AND FUNGI THAT CAN CAUSE SPOILAGE ON AGRICULTURAL COMMODITIES. Wilt is the most important disease of guava. Tilt (0.2%) gave 100% reduction of fruit infection over control. The zero level of infection as maintained through fungicide spray created basis for apparently actual fruit weight and its use for comparison with fruit weights obtained at different levels of anthracnose infection (James, 1974). Varietal effects: Among the varieties, Kazipeyara carried the highest fruit infection, whereas Mukundpuri had the lowest infection. Disease severity (% fruit infection and % fruit area diseased) was recorded at 15 days interval for continuous 4 times starting 15 days after treatment. Disease severity was higher in 1987 than in 1988. Using water containing moderate to high amounts of sulfur may cause CS 2005 to neutralize. High prevalence of the disease even in epidemic form has been reported every year from different parts of the country (Meah and Khan,1987; Rahman, 1989). ... DISEASES OF GUAVA AND IT'S MANAGEMENT - Duration: 22:14. For this, disease occurrence was comparatively lower in combined application of cowdung+SOC. This plant finds applications for the treatment of diarrhea, dysentery, gastroenteritis, hypertension, diabetes, caries and pain relief and for improvement in locomotors coordination. The experiment was conducted during September-August of 1995-96 at the farm of the Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh. Ten fruits were selected randomly from each plant and considering the total surface area of en individual fruit as 100%, the diseased portion of it was estimated. Foliar spray: Two fungicides namely tilt [1-2-(2,4-Dichlorophenyl)-4-propyl-1, 3di ortho oxalen-2-Elmethyl-1 H 1,2,4-Tryozole] and rovral [1-isopropyl carbomoyl-3-(3,5-Dichlorophenyl) hydantoin] and three minor elements namely manganese (MnSO4), boron (HBO3) and zinc (ZnSO4,) were sprayed as solution on to the trees. Cultural control is one of them (Chapman, 1975; Reuther and Labanauskas, 1975; Malraja, 1990; Raut, 1990; Singh et al., 1990). Spraying were started from early fruit stage (fruit setting) and was continued for 3 sprays at an interval of 15 days. The whole surface of the plant including both surface of leaves, buds, twigs, fruits and branches were well sprayed by the solution of the fungicide. Percent loss in fruit weight decreased with decrease in level of fruit infection owing to fungicide spray. SOC, cowdung+SOC, gypsum produced highest disease in order of their efficacy. Four varieties: i) Kazipeyara ii) Mukundpuri iii) Sarupkatti and iv) Deshi were used in the experiment. Besides this, fruit and post harvest diseases are also important which causes serious loss. Anthracnose. Both tilt and rovral proved as effective fungicides in controlling anthracnose of unripe fruits. Thus there were 3 plants of each variety to constitute 3 replications of a single treatment. Spray solutions were prepared by mixing the definite amount of the chemicals with tap water in bucket. 1). However observation made by Raut (1990) indicate that high doses of potassium induce resistance mechanism in the plant against alternaria leaf blight of cotton. Disinfect by dipping the knife in one part bleach to four parts of water. Minor elements, Zn, Mn, and B spray gave significant reduction in control of guava anthracnose. In Kazipeyara the fruit weight loss of the unsprayed plant was 30% and it was decreased to 14.40% after one spray though disease reduction was not significantly different. In the combination of cowdung+SOC disease severity was less than SOC. In sprayed plants, fruits grained weight which showed a continued increase in weight with increase in number of fungicide sprays. Total surface area of an individual fruit was considered as 100%. These two chemicals subject to their availability could be considered as potential fungicides to control guava anthracnose. Therefore, further investigation of the effectiveness of the non-chemical management practices tried in the present study for control of guava anthracnose is required. Seeds may also be treated prior to planting. Percent fruit weight loss ranged from 16.4% (Deshi) to 30.4% (Kazipeyara). Figures in a column with different letters differ at p = 0.01, Trend In Incidence of guava fruit anthracnose with time when soils were amended with manures (i) and fertilizers (ii). One hundred percent of plants and 90–100% of fruits were severely diseased. Very slight infections were observed for rovral spray (0.08%), Mn spray (0.08%), NPK+ZnSO4+gypsum (0.18%), PK+ZnSO4 and MOC (ghani) (1.8%). Introduction. Besides it is a great threat to germplasm preservation. Many countries have a long history of using guava for medicinal purposes. Among fungal diseases of guava, anthracnose of guava, caused by Colletotrichum gloeosporioides (B. Weir and P.R. A total of 10 diseases have been reported on guava in Bahgladesh (Meah and Khan,1987). Treatment effects: The disease severity or per cent fruit infection decreased gradually with increase in number of fungicide sprays. Severely anthracnose infected guava fruits become fully unfit for consumption and lose food value and market price. Foliar spray: No disease observed in tilt sprayed plants. Assessment of disease strategies: Total number of diseased and healthy fruit in each test plant were counted and per cent fruit infected were calculated on the basis of totality of healthy and diseased fruits. Five trees sprayed with compressed air sprayer containing 10L solution. Observation after each spray indicated a slow but steady decrease in new fruit infections in treated plants. These factors affect the effectivity too. Plants take their nourishment highly from NPK sources. Anthracnose in fruit tropical trees part 1! The purpose of the present study was to explore the possibility of integration of various approaches for control of guava anthracnose. Tilt and Zinc gave 100% reduction in fruit infection followed by rovral and manganese sulphate, both of which produced 0.8% infected fruits. This result is in agreement with Rahman and Hossain (1989) who reported that oil cake increased the disease severity. Continued observation on fruit infection revealed that infections on untreated fruits increased with time, which at the time of 60 days after soil amendments resulted in 9.2% fruit infection. Fruit infection in urea and TSP treated plants also increased but still at slower rate. Among the varieties, gain in fruit weight was higher in Kazipeyara followed by Sarupkatti. Supplementation of minor essential nutrient element sometimes help in the reduction of incidence of disease. Percent fruit weight loss was positively correlated with fruit anthracnose level. One set of plants were kept for control treatment receiving no manures and or fertilizers. Spraying was started from early fruit stage i.e., before appearance of infection. Assessment of fruit anthracnose severity But during the main season the varieties were found heavily infected with fruit anthracnose. Statistically the effect of TSP (4.2%) on surface area diseased was similar to that of MOC-ghani (3.2%) and urea (4.8%) but better than urea and inferior to MOC (ghani). They found young immature guava fruits were free from infection while mature fruits were infected readily and this difference might be due to concentration of potassium ion at different developmental stages have been found. No disease developed for the treatment of cowdung, MOC (mill), MP, ZnSO4, Cowdung+MOC (mill), K+ZnSO4, NPK+tilt spray and NPK+Zn spray. Gypsum alone had no effect on development of disease. The organic manures, cowdung, MOC (mill) and their combinations improved the soil properties like texure, structure, aeration, water holding capacity etc. Eighty percent of the guava plants were found infected with anthracnose disease and over 40% of the fruit produced on those trees were severely infected. Values are average of five replications with two seasons. Percent fruit surface area diseased in the untreated plants was significantly higher than in the treated plants. Anthracnose is the most commonly observed disease that affects both pre- and postharvest management of guava. Deshi variety had more infection than Mukundpuri. Integration of various management practices has brought success in some crops (Raut, 1990; Singh et al., 1990; Adisa, 1985). Fruit Canker (Restalotia psidii Pat.) TSP, cowdung+MOC (ghani) were less effective but urea, gypsum, cowdung+SOC, and SOC were ineffective. Critical point model (James, 1974) is based on the regression of percent yield loss against percent disease severity. But guava plants are susceptible to many fungal diseases. The disease incidence was negligible in four varieties of guava during minor season. Hot water treatment of seeds or fruits (48°C for 20 minutes) can kill any fungal residue and prevent further spreading of the disease in the field or during transport. Similar trend was observed in SOC, cowdung+SOC and gypsum treated plants but at apparently at a slower rate. Psidium guajava (guava) is well known tropic tree which is abundantly grown for fruit. Raut (1990) postulated that high dose of nitrogen favored the development of alternaria leaf blight of cotton which agrees with our findings. : i ) Kazipeyara ii ) Mukundpuri iii ) Sarupkatti and iv ) Deshi were used singly protect. Problem in Bangladesh been tried in the first experiment a great loss by the.. 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Early may and late October 1992 weight decreased with decrease in new infections!