Studies on management of bitter gourd distortion mosaic virus using nonchemicals

Reeny Mary Zacharia, Sally K. Mathew

Abstract


Bitter gourd (Momordica charantia L.) is the most important curcubitaceous vegetable in Kerala. The damages caused by the attack of pests and diseases are the major constraints for the bitter gourd cultivation. Among the various diseases affecting the crop, mosaic disease caused by virus is known to cause severe loss especially during summer season. Considering the overall performance of various treatments during the two seasons it was found that treatment of Imidacloprid 0.025 % was found effective in reducing BGDMV infection. In the present study, application of coconut vinegar one per cent reduced disease incidence and severity of infection. The treatment with Apis melliphica 30 potency and Arsenicum album 30 potency showed reduction in viral infection and also increasing yield. Studies on weather parameters showed that influence of mean maximum temperature and mean relative humidity on disease incidence varied with two seasons. Relative humidity in the forenoon showed positive co-relation with disease incidence and disease severity in both seasons and, hence found to be the most influencing weather parameter in BGDMV infection

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