Abstract
Several management approaches against red ant of potato Dorylus orientalis (Westwood) were studied at farmer's field near Hill Agricultural Research Station, Khagrachari during 2008-09 and 2009-10 cropping seasons to find out the most effective management technique. Dursban 20 EC and Sevin 85 WP reduced red ant damage significantly. From both the season (2008-09 and 2009-10), three times application of Dursban 20 EC @ 5ml/lit of water around the root zone starting from 45 days after sowing of potato tuber at 10 days interval gave the lowest tuber infestation (17.28% and 10.68%) with (62.77% and 56.60%) infestation reduction over control closely followed by 3 times application of Sevin 85 WP @ 3 gm/lit of water (20.14% and 13.73%) with (85.77 % and 81.71%) infestation reduction over control. Both the season the highest infestation (46.41% and 75.06%) was recorded from the control treatment.
Highlights
The pest damages mainly the potato stems and tubers by chewing holes and in case of severe attack plants becomePotato (Solanum tuberosum L.) belongs to the family wilt in direct sunlight and will eventually dry up [14].Solanaceae is used as the most important food for a large In Bangladesh red ant is reported as a serious problem in number of people in the world
From two consecutive sessions (2008-09 and 2009-10) results indicated that three times application of Dursban 20 EC @ 5ml/lit of water around the root zone starting from 45 days after sowing of potato tuber at 10 days interval gave the lowest tuber infestation (17.28% and 10.68%) closely followed by 3 times application of Sevin 85 WP @ 3 gm/lit of water (20.14% and 13.73%)
Both the season the highest infestation (46.41% and 75.06%) was recorded from the control treatment (Table 1 and 2). During both the cropping season the highest red ant infestation reduction over control (62.77% and 85.77%) was recorded from Dursban 20 EC followed by Sevin 85WP (56.60% and 81.71%)
Summary
Potato (Solanum tuberosum L.) belongs to the family wilt in direct sunlight and will eventually dry up [14]. Solanaceae is used as the most important food for a large In Bangladesh red ant is reported as a serious problem in number of people in the world. It is the most important the hilly areas of Khagrachari district. During winter season non-cereal food crop and ranks fourth in terms of total global it attacks potato crop just after tuber formation and food production after maize, wheat and rice [1] It is one of infestation in continued upto harvesting of potato unless any the important vegetables as well as cash crop in Bangladesh management approach is taken. The present investigation was carried out to find out the suitable management approach for controlling potato red ant
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