Assessment of quantitative and qualitative losses by insect pests in different crop production systems of cabbage (Brassica Oleracea L.)

Abstract

Cabbage (Brassica oleracea L.) is the most common Cole crop that thrives best in cool season. Many insect pests attack on cabbage and cause quantitative and qualitative losses in different cabbage producing areas. The use of pesticides is the predominant control measure applied to control these pests but causing several disadvantages, such as devel opment of resistance in insect pests against these insecticides and health hazards for non-target organisms including pollinators, biological control agents and humans. The present study was conducted to assess seasonal qualitative and quantitative losses by insect pests in different crop production systems of cabbage. The cabbage was sown during middle of September and end of November in different plots and each plot had an area of 10×15 ft . The plant to plant and row to row distance was 0.84 ft. and 2 .4 ft. respectively. The treatments like integrated pest management (IPM), black mulch, reduce risk pesticides and growers standard was used during the study under randomized complete block design (RCBD). The quantitative and qualitative pre and post treatment data was collected at weekly bases and compared with the control to find out the effective production system. Finally data was analyzed with suitable statistical technique. The results revealed IPM and reduce risk pesticides treatments showed less qualita tive and quantitative losses than other treatments. Among all treatments , the control had more quantitative and

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