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Three wild rice species and six cultivated rice varieties were evaluated to determine their mechanisms of resistance to Nilaparvata lugens (Stal.). Wild rice species, Oryza officinalis, O. punctata, and O. latifolia and cultivated rices Rathu Heenati (Bph 3), Babawee (bph 4), ARC 10550 (bph 5), Swarnalata (Bph 6), Ptb 33 (bph 2 + Bph 3) and the susceptible Taichung Native (TN 1) (no resistance gene) were included in the study. In a free choice seedbox screening test, wild rice species maintained their high level of resistance through the 48 h exposure to N. lugens nymphs while plant damage ratings of cultivated rice varieties increased with time. Wild rices were non preferred and significantly more individuals settled on susceptible TN 1 followed by cultivated rices. The quantity of food ingested and assimilated by N. lugens on wild rices was less than on cultivated resistant varieties. N. lugens caged on resistant wild rices had slow nymphal development, reduced longevity, low fecundity, and low egg hatchability as compared to N. lugens on cultivated resistant varieties.

Cruciferous vegetables are the important dietary source of vitamins (A, B1 and C) and minerals like phosphorus, potassium, sodium, calcium and iron which are essentially needed as supplement in human diet. The varied agro-climatic conditions prevailing in India are able to produce variety of vegetables throughout the year. India is the second largest producer of cruciferous vegetables in the world. It is grown over an area of 3.12 million ha in the world and 0.331 million ha in India. However, the average productivity of cabbage in India is about 22.0 metric tonnes/ha which is less than World's productivity of 22.3 million tonnes/ha (NHB, 2017). Many species of insects attack the commonly growing cruciferous vegetables like cabbage (Brassica oleracea L. var. capitata), cauliflower (Brassica oleracea L. var. botrytis), turnip (Brassica rapa L.), carrot

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