author(s)
Bapugouda Kyatanagoudra, C Chinnamade Gowda and N Srinivasa

abstract
Mass production of N. longispinosus on T. urticae was studied on pole bean as well as in French bean in polycarbonate house. When the predator mites were released @ 4 per leaflet on spider mites infested 50 days old pole bean plants, a maximum of 25,933.47 predatory mites were recorded from each pole bean plant after 30 days. As a result the total number of predatory mites produced from 27 pole bean plants raised in 9.72 m² ground area was 7,00,203. Comparatively, a maximum of 1295.35 predatory mites per French bean plant and a total of 1,86,530 predatory mites from 9.72 m² ground area could be produced from 50 days old French bean plants. It was evident that using pole bean plants 900.47 predatory mites could be produced per m² per day as against 383.81 predatory mites per m² per day on French bean. Also there was 2.4 folds increase in the production of predatory mites when pole bean plants were used vis-a-vis French bean plants.