Cucurbits: Biotic and Abiotic Stresses

Among the leading vegetable producing countries in the world, India ranks second only after China. Vegetables play pivotal role in mitigating nutritional requirement of the soceity as well as providing employment oppurtunity specially in the agriculture dominated rural agrarian economy of the developing countries like India. Among different kinds of vegetables, cucurbits are a diverse group of vegetables (include pumpkin, bitter gourd, water melon, cucumber, pointed gourd, ridge gourd, bottle gourd etc) cultivated widely all over the South Asian countries including Indian sub-continent. These are basically worm season crops and fetch several biotic and abiotic stresses during their life stages. These stressess considerably affect yield potentiality of several cucurbitaceous vegetables quantitatively as well as qualitatively. Climatic changes and increment in cropping intensity reflected in a remarkable and rapid shift of vegetable ecosystem that ultimately increasing these stresses day by day. Biotic stresses like insect, mite and nematode pests etc. are the most significant biotic stresses which are responsonible limiting yeild reduction as well as quality deterioration of produces. Application of hazardous toxic chemicals to combat the pest problems of cucurbits not only results in residual toxicity in vegetables but also destabilising agro-ecosystem