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Study on the biology of painted bug Bagrada picta Fabricius, and its eradication on the Brassica napus L., was conducted in Ramgarh, Jharkhand, India

Rajesh Kumar Upadhyay*
Department of Zoology, Ramgarh College, Vinoba Bhave University, Hazaribagh, Jharkhand, India.
Received : 25th July, 2022 ; Revised : 25th August, 2022

Abstract– Ramgarh is a district town located at latitude: 23.38oN and longitude 85.34oE. Moderate temperature, more humidity and dense greenery makes it one of the most attractive districts. Its nature puts all the workmanship to create this place and reinforced all its beauty to it. It is surrounded three sides by hills and open at one side by planes. The hills, their slops, a variety of soils, plants and animals makes it a natural resource of biodiversity it is a niche of various kinds of animal and insect population. These insects’ pest destroys the agricultural and ornamental crops that gives economic losses to the farmers. The pest B. picta Fabricius is a common insect, people called it painted bug. It appears as bright black colour with reddish yellow spot. The pest was active during month of February to November. During extreme cold months it hidden under the heap of dried oil seed plants lying in the field. It destructs the mustard and rape plants cultivated in the field; the serious infestation makes 50 to 80 % loss of seed production. The seeds of B.napus (L). is very useful for the human being consume it as edible oil in food items, cosmetics. Its green plant is consumed direct and in cooked way as delicious items in kitchen. It is a cash crop; the farmers cultivate it for economic growth. This important cash crop is destroyed by the pest B. picta Fabricius, commonly known as painted bug. It was observed that the pest was active since February to December, during extreme cold season it heaps of dried leaves of the host plant in the field. The oviposition occurs underside of the leaves, stems and on the soil near the host plant singly or close together in cluster of 05 to 10, after incubation of 03 to 06 days the tinny nymphs appear and start to feed the soft leaves of host plants. Both nymph and adult are equal destructive to host plant. 07 to 09 overlapping generations were observed in a year. Prevention from this bug is very difficult, scent gland of bug makes emission which protect it from predatory arthropod attack. Some synthetic chemicals are advised to farmers to spray chloropyrifos, malathion and prophenofos are widely used insecticides control the bug.

Key words: Bagrada picta, Brassica napus, insecticides, agricultural and ornamental crops, economic losses

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