However observation made by Raut (1990) indicate that high doses of potassium induce resistance mechanism in the plant against alternaria leaf blight of cotton. Percent fruit weight loss ranged from 16.4% (Deshi) to 30.4% (Kazipeyara). Psidium guajava (guava) is well known tropic tree which is abundantly grown for fruit. Four varieties and 7 treatments (0, 1, 2, 3, 4, 5, 6 sprays) constituted the 2- factorial experiment. 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. But this has not been tried in case of guava anthracnose. Minor elements, Zn, Mn, and B spray gave significant reduction in control of guava anthracnose. Both tilt and rovral proved as effective fungicides in controlling anthracnose of unripe fruits. Disinfect by dipping the knife in one part bleach to four parts of water. Stem canker and dry fruit rot. Similarly spray of fungicides and minor elements especially tilt, rovral and zinc had profound effects on anthracnose infestations. Cowdung, MOC (mill), MP, ZnSO4, cowdung+MOC (mill) and K+ZnSO4 results 100% reduction in fruit infection over control. Rate of decline in fruit infections were quicker in rovral than in manganese and boron. Anthracnose is the most commonly observed disease that affects both pre- and postharvest management of guava. 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. Spraying was started from early fruit stage i.e., before appearance of infection. Increase in fruit weight was lower in other varieties (Table 3). conducted to confirm the results of anthracnose control. 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). Regression coefficients in both cases were highly significant. Besides this, fruit and post harvest diseases are also important which causes serious loss. Besides it is a great threat to germplasm preservation. Deficiency of any one of the above elements makes plants vulnerable to disease. Raut (1990) postulated that high dose of nitrogen favored the development of alternaria leaf blight of cotton which agrees with our findings. This phenomenon continued until no fruit weight loss occurred at the end of 5 sprays when virtually no fruit infection occurred. Guava (Pisidium guajava L.) is a common and important fruit crop in Bangladesh.But guava plants are susceptible to many fungal diseases. 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). Fruit were evaluated daily for incidence and severity of anthracnose. This way the anthracnose spores won’t have a place to overwinter. Remove and destroy any infected plants in your garden. Thus there were 3 plants of each variety to constitute 3 replications of a single treatment. The disease incidence was negligible in four varieties of guava during minor season. 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. One set of plants were kept for control treatment receiving no manures and or fertilizers. Varietal effects: Among the varieties, Kazipeyara carried the highest fruit infection, whereas Mukundpuri had the lowest infection. In another report Midha and Chohan (1970) described that Colletotricum gloeosporioides showed no significant response up to a concentration of 0.7% of KCl. First recording was done 24 days after the spray and it continued for five times at an interval of 7 days i.e., up to fruit maturity. Urea, gypsum, cowdung+SOC and SOC produced highest (4.8-6.8%) surface area infection among all other treatments with SOC supporting the highest. Spraying of Zn reduced the deficiency problem in plants and might have given best satisfactory effect (100% over control) in the reduction of disease. In sprayed plants, fruits grained weight which showed a continued increase in weight with increase in number of fungicide sprays. Manganese, boron, and zinc were sprayed at the rate of 1000, 500 and 2000 ppm respectively. One plant of a single variety was used as a replication. However effect of all treatments were statistically similar. Many countries have a long history of using guava for medicinal purposes. Guava fruit weight loss owing to anthracnose (Colletotrichum gloebsporioides) severity was estimated on the basis of critical point model. Percent loss in fruit weight decreased with decrease in level of fruit infection owing to fungicide spray. guava fruit. 2). The methods and evaluations were the same described in the first experiment. Arnong the guava diseases anthracnose caused by Colletotrichum gloeosporioides Penz. Well decomposed cowdung collected from the village was applied. This result partially coincides with the result described by Rahman and Hossain (1988) for control of guava anthracnose. Nitrogen enhances the development of guava anthracnose. These results are very much promising from the view point of non-chemical control of guava fruit anthracnose. Many commercial producers think to give up the cultivation of guava owing to a great loss by the disease. Severely anthracnose infected fruits become fully unfit for consumption and lose food value and market price. TSP, cowdung+MOC (ghani) were less effective but urea, gypsum, cowdung+SOC, and SOC were ineffective. Assessment of fruit anthracnose severity Soil amendments: Soil amendment was convincing in relation to suppression of guava fruit 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. Fruit Canker (Restalotia psidii Pat.) 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). It can attack many different types of plants, from grasses to flowering trees such as dogwood. Plants take their nourishment highly from NPK sources. Probably the combination was incompatible for disease control rather it might have produced another reaction (unknown) for which disease incidence increased. This disease can cause considerable postharvest losses and can affect young developing flowers and fruit. The total number of treatment combinations were 84 (= 4x7x3). In other varieties per cent fruit weigh loss was zero with only two consecutive sprays (Table 3). No disease developed for the treatment of cowdung, MOC (mill), MP, ZnSO4, Cowdung+MOC (mill), K+ZnSO4, NPK+tilt spray and NPK+Zn spray. Boron spray gave poorer results in comparison to all other treatments. Soil amendments: Soil amendments by organic manures and inorganic fertilizers were applied separately and in combination during early May and late October 1992. Psidium guajava L. ) is based on the basis of critical point (! ( 99 % over control, reduced fruit infection over control weight with increase in weight... Observed in tilt sprayed plants dose of nitrogen cause succulence of the study! ) were less effective but urea, gypsum, cowdung+SOC, and proliferates the... 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