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A case study of the life cycle of the Pectinophora gossypiella Saunders (Lepidoptera:Gelechiidae) of a cotton worm on the vegetable plant Abelmoschus esculentus of Ramgarh, Jharkhand, India

Rajesh Kumar Upadhyay*
Department of Zoology, Ramgarh College, Ramgarh, V. B. University, Hazaribag, Jharkhand, India
Received : 22nd April, 2020 ; Revised : 19th May, 2020

Abstract:- The pest Pectinophora gossypiella Saunders is a serious pest of cotton plant, it damage the stem, buds flowers and the cotton bolls. Its life cycle was completed on cotton plant Gossypium hirsutum. It damage 75% of cotton bolls, plants and cotton seeds. Some times on serious infestation the damage reach up to 100 %. The quality and the quatity of the cotton balls and cotton seeds decline. The present paper deals with the life cycle of Pectinophora gossypiella Saunders on a new vegetable plant Abelmoschus esculentus in Ramgarh, Jharkhand. The life cycle was studied during the year 2018-2020 at Ramgarh. During the study it was found that the life cycle of pest was very complicated generally it completed 4 to 5 overlapping generations between July to November of a year. Some of the larvae hibernate in extreme cold and larval period prolong up to two years. Some of the moths emerge out from the cocoon present in the soil. The larvae enters the fruits of vegetable and protect them self from the birds and predators as well as eating the plant and pluck the bore by excreta cause as damage the vegetables. The lady’s finger is a healthy and tastier vegetable, rich in carbohydrate, minerals and fibres. The pest damage the cultivated vegetable plants and loss not only the quality, quantity, and taste of the vegetables and also the profit of the farmers. Ramgarh is a district town, the rural area is known for gross vegetable production, the climatic condition is moderate and suitable for vegetable production. The experimental pest is very difficult to control. Pest should be controlled by mechanical and by spraying carbary l 0.1%, endosulphan 0.05%., endrin 0.04%.

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