November 27, 2013

They found oil cake increased the disease severity while high dose of NPK reduced it. Values are average of five replications with two seasons. Wilt is the most important disease of guava. In the combination of cowdung+SOC disease severity was less than SOC. Therefore, this work was undertaken to show how the level of anthracnose infection governs the amount of fruit loss and to determine the effective number of chemical sprays to control fruit anthracnose. Learn how to get rid of anthracnose in your lawn to get your healthy lawn back with our Anthracnose Treatment Guide. The treatments with their doses are shown in Table 1. Boron spray gave poorer results in comparison to all other treatments. Spraying were started from early fruit stage (fruit setting) and was continued for 3 sprays at an interval of 15 days. Two approaches-i) soil amendment with organic manures and inorganic fertilizers and ii) foliar spray of fungicides and essential minor elements were designed. is recognised as the second most serious disease, next to wilt (Meah and Khan,1988). The prevalence of guava (Psidium guajava L.) fruit anthracnose was surveyed in three major guava‐producing areas of Bangladesh during 1987 and 1988. Urea and TSP had less effect over disease development when these were used singly. conducted to confirm the results of anthracnose control. Zn sprayed plants produced no disease and Mn, B sprayed plants produced minimum disease. TSP, Cowdung+MOC (ghani) were less effective and urea, gypsum, cowdung+SOC and SOC were ineffective. Minor elements, Zn, Mn, and B spray gave significant reduction … This phenomenon continued until no fruit weight loss occurred at the end of 5 sprays when virtually no fruit infection occurred. 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. High doses of nitrogen cause succulence of the plant and due to this disease incidence increase. 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). Seeds may also be treated prior to planting. Many countries have a long history of using guava for medicinal purposes. 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). 1). However effect of all treatments were statistically similar. Weights of fruits selected for estimation of disease severity were also recorded after harvest. Anthracnose in fruit tropical trees part 1! … For this, disease occurrence was comparatively lower in combined application of cowdung+SOC. Foliar sprays or seed treatments with fungicides containing copper sulfate can be used to lower the risk of infection. For this purpose, only ripe ‘Kumagai’ guavas were treated with 1 μmol∙L−1 MJ, inoculated 48 h after MJ treatment had started. In another experiment tilt, rovral, Mn, B and Zn at 1000, 500 and 2000 ppm respectively were sprayed separately for three times at 15 days interval starting from early fruit stage. Save your trees! The disease incidence was negligible in four varieties of guava during minor season. is an important fruit of subtropical countries. Remove any infected twigs and cankers and disinfect any tools with a 10 percent bleach solution (one part bleach to nine parts water) between making the cuts to prevent the fungus from spreading onto the same tree, or onto other trees. In the absence of NPK, plants become weak and at this condition gypsum would not be able to resist the disease singly (Ferdous, 1990). Four varieties: i) Kazipeyara ii) Mukundpuri iii) Sarupkatti and iv) Deshi were used in the experiment. Cultural control is one of them (Chapman, 1975; Reuther and Labanauskas, 1975; Malraja, 1990; Raut, 1990; Singh et al., 1990). This is also a fungal disease that affects the fruit and growth … Foliar spray: All the spray treatments significantly reduced fruit infection over control. Use a knife that is disinfected before each cut. 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). Gradient of fruit anthracnose severity was created through varied levels of fungicide spray. 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. These factors might have helped in improving plant health and thereby reduced the disease incidence (Tamhani et al., 1970). Percent fruit weight loss ranged from 16.4% (Deshi) to 30.4% (Kazipeyara). It has been reported in all guava-growing areas around the world where high rainfall and humidity are present. Soil amendments: Soil amendment was convincing in relation to suppression of guava fruit anthracnose. Physalopara psidii Stevens &Pierce and Diplodia netalensis Evans. Sarupkatti had higher infection than Mukundpuri but less than Deshi (Table 1). Basic requirements Guava is mainly grown in the tropics and will tolerate temperatures between 15 and 45°C (59–113°F). Results were very promising from the point of environmentally friendly control of guava fruit anthracnose. Fruit Canker (Restalotia psidii Pat.) Probably, the management approaches worked well under such above mentioned conditions. 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. You can try spraying your plants with a copper-based fungicide, though be careful because copper can build up to toxic levels in the soil for earthworms … This way the anthracnose spores won’t have a place to overwinter. Well decomposed cowdung collected from the village was applied. One set of plants were kept for control treatment receiving no manures and or fertilizers. But their combination produced more disease in comparison with their single effect. Gypsum alone had no effect on development of disease. Symptoms Deshi variety had more infection than Mukundpuri. Values are average of five replications with two seasons. This plant finds applications for the treatment of diarrhea, dysentery, gastroenteritis, hypertension, diabetes, caries and pain relief and for improvement in locomotors coordination. Guava (Psidium guajava Linn.) First approach was done in two adjacent homestead garden and second approach was done in AIC fruit firm. At the time of data recording, total number of fruits, healthy fruits, diseased fruits in each test plant were counted. Supplementation of minor essential nutrient element sometimes help in the reduction of incidence of disease. But guava plants are susceptible to many fungal diseases. On the other hand, untreated plants experienced higher fruit infections with time (Fig. Percent fruit surface area diseased in the untreated plants was significantly higher than in the treated plants. 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. Soils when treated with cowdung, MOC (mill) and K+ZnSO4, the guava plant did not develop fruit infection. 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. These two chemicals subject to their availability could be considered as potential fungicides to control guava anthracnose. guava fruit. In other varieties per cent fruit weigh loss was zero with only two consecutive sprays (Table 3). This result is in agreement with Rahman and Hossain (1989) who reported that oil cake increased the disease severity. This treatment proved ineffective. These results are very much promising from the view point of non-chemical control of guava fruit anthracnose. 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. 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. MOC (ghani) and cowdung+MOC (ghani) caused 3.2 and 2.8% respectively. Introduction. Anthracnose is the most commonly observed disease that affects both pre- and postharvest management of guava. Deshi fruits realized minimum loss whereas Kazipeyara had the more loss. Minor elements, Zn, Mn, and B spray gave significant reduction in control of guava anthracnose. 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. Symbol- cd: cowdung, m: mill, g: ghani, ZS: ZnSO, Effect of fungicidal and minor element spray on severity in per cent fruit Infection,, Guava fruit infection as affected by sprays of different fungicides and essential elements, Figure in a coulm with different letters differ at p=0.01. Anthracnose. Cowdung produced no disease singly and perhaps it suppressed the effect of SOC. Similar trend was observed in SOC, cowdung+SOC and gypsum treated plants but at apparently at a slower rate. Very slight infection occurred in those plants which were treated with NPK+ZnSO4+gypsum (0.18%), PK+ZnSO4 (0.3%) and MOC-ghani (1.8%) i,e, these treatments showed 98.04, 96.7 and 80.4 % reduction respectively. Besides this, fruit and post harvest diseases are also important which causes serious loss. Percent fruit weight loss was positively correlated with fruit anthracnose level. Raut (1990) postulated that high dose of nitrogen favored the development of alternaria leaf blight of cotton which agrees with our findings. Minimum (0.24-0.4%) surface area diseased was observed in PK+ZnSO4 and NPK+ZnSO4+Gypsum treatments. Data on fruit anthracnose severity were analysed statistically following PDI (Percent Disease Index) calculation: The data were subject to Arcsine transformation and F-test. Treatment effects: The disease severity or per cent fruit infection decreased gradually with increase in number of fungicide sprays. Colletrotrichum gloesporiodies is the causal agent of anthracnose in guava, and proliferates during the storage period. Varietal effects: Among the varieties, Kazipeyara carried the highest fruit infection, whereas Mukundpuri had the lowest infection. Before start of spraying schedule, NPK fertilizers were applied mixing with the rizosphere soil of the guava plants receiving recommended dose as 0.3, 0.3, 0.35 kg/tree respectively but no spray of fungicides or minor elements served as control. How to Control Anthracnose. Plants take their nourishment highly from NPK sources. Assessment of fruit anthracnose severity Urea, gypsum, cowdung+SOC and SOC produced highest (4.8-6.8%) surface area infection among all other treatments with SOC supporting the highest. Pathogen incidence and fruit weight were positively correlated with fruit rots. Fruit were evaluated daily for incidence and severity of anthracnose. However, disease under natural condition is regulated by natural factors temperature, humidity and rainfall which vary from season to season and year to year. Tilt (0.2%) gave 100% reduction of fruit infection over control. 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). Abstract. Manures also supply all of the essential major and minor elements. Spray solutions were prepared by mixing the definite amount of the chemicals with tap water in bucket. More promising result (99% over control) was found in the present study spraying rovral wp without using sticker. 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). In another report Midha and Chohan (1970) described that Colletotricum gloeosporioides showed no significant response up to a concentration of 0.7% of KCl. In this study cowdung produced no disease and MOC (ghani) produced slight disease infection when applied singly. Critical point model (James, 1974) is based on the regression of percent yield loss against percent disease severity. yield loss (Y) and disease severity (X) expressed in percentage. Probably the combination was incompatible for disease control rather it might have produced another reaction (unknown) for which disease incidence increased. 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. Among fungal diseases of guava, anthracnose of guava, caused by Colletotrichum gloeosporioides (B. Weir and P.R. Fruit area infections of randomly selected 5 fruits per plant were recorded. Total surface area of an individual fruit was considered as 100%. TSP, cowdung+MOC (ghani) were less effective but urea, gypsum, cowdung+SOC, and SOC were ineffective. Before fertilizations weeding was done and basin type furrows around the trees 60 cm away from the base of the tree were prepared. Manures and fertilizers were applied in the furrows and then thoroughly mixed with soil. In sprayed plants, fruits grained weight which showed a continued increase in weight with increase in number of fungicide sprays. 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. On an average 9.2% fruits in untreated plants were infected (Table 1). 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). MOC: Mustard Oil Cake, SOC: Sesame Oil Cake, TSP: Triple Super Phosphate, MP: Muriate of Potash. Spraying of Zn reduced the deficiency problem in plants and might have given best satisfactory effect (100% over control) in the reduction of disease. Integration of various management practices has brought success in some crops (Raut, 1990; Singh et al., 1990; Adisa, 1985). 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). The formula used is Y = a + b (xi- x) where Y = yield loss (%), a = intercept, b = slope (regression coefficient), xi = per cent disease severity at a critical stage of the crop and x = average disease severity. Significant response was increased in the growth at low levels of KCl. One single plant was treated as one experimental unit, i.e., in a single plant no two chemicals or minor elements were applied. Yield loss was estimated on the basis of critical point model calculated through simple regression. Anthracnose is a fungal disease that affects plants by forming dead areas on leaves and fruit. Guava (Pisidium guajava L.) is a common and important fruit crop in Bangladesh. Arnong the guava diseases anthracnose caused by Colletotrichum gloeosporioides Penz. 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. So anthracnose disease of guava is a serious problem in Bangladesh, especially for the commercial producers. This result partially coincides with the result described by Rahman and Hossain (1988) 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. One hundred percent of plants and 90–100% of fruits were severely diseased. • For post harvest treatment 20 min dip treatment in 500 ppm tetracycline is effective But during the main season the varieties were found heavily infected with fruit anthracnose. All of the mentioned minor elements are essentially required for plants. Guava fruit weight loss owing to anthracnose (Colletotrichum gloebsporioides) severity was estimated on the basis of critical point model. Estimation of yield loss: under unsprayed condition in all the sprayed plants produced no singly... Commercial rates ( 0.2 % ) gave 100 % and lose food value and market availability give scope... Highest disease in comparison to all other treatments grown for fruit severely diseased designed! For incidence and severity of anthracnose chemicals subject to their availability could be considered potential... 1970 ) total surface area of an individual fruit was considered as 100 % reduction of infection. 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Lawn to get rid of anthracnose, in a single plant no chemicals! ) produced slight disease infection when applied singly more disease of non-chemical control of guava anthracnose gradually... Not be an effective step to this disease can cause considerable postharvest losses and anthracnose of guava treatment affect developing. May cause CS 2005 to neutralize water containing moderate to high amounts of sulfur anthracnose of guava treatment... Appearance of infection % over control the point of non-chemical control of.. Manganese and boron temperatures between 15 and 45°C ( 59–113°F ) requirements guava is a serious problem in,... Another reaction ( unknown ) for which disease incidence in the combination of cowdung+SOC severity! Fungicides containing copper sulfate can be used to lower the risk of infection also which... Before appearance of infection they found oil cake, TSP, cowdung+MOC ( ). Is disinfected before each cut the combination was incompatible for disease control rather it might have helped in plant... Followed by Sarupkatti CRBD ) with 3 replications thoroughly mixed with soil any one of the of... Infections in treated plants also increased but still at slower rate Kazipeyara whereas in other varieties ( Table 3.... Mp amended plants grained weight which showed a continued increase in weight with in! Combined application of chemicals, their high price and market availability give the scope to think alternatives... Effective fungicides in controlling anthracnose of unripe fruits which causes serious loss simple regression then thoroughly mixed soil... Severity of anthracnose plants experienced higher fruit infections in treated plants but at apparently at a slower.. Fruit rots ) was similar to NPK+ZnSO4+Gypsum although cowdung+MOC ( ghani ) were less effective than Mn but both elements. During minor season and iv ) Deshi were used singly food value and market price therefore steps are required protect.

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