ẢNH HƯỞNG CỦA CÁC BIỆN PHÁP BỔ SUNG THỨC ĂN CHO THIÊN ĐỊCH CỦA RẦY NÂU TRÊN RUỘNG LÚA TẠI CẦN THƠ

The experiment was conducted in Can Tho during wet season 2011 and dry season 2011-2012, was laid out in RCBD with 3 replication, 6 treatments (T1: spraying with sugar solution, T2: spraying with protein solution, T3: growing flower Alantanna camara on rice bunds, T4: growing flower Melampodium paludosum on rice bunds, T5: growing Cuphea hyssopifolia on rice bunds, T6: Untreated check). Apply ecological engineering techniques to attract natural enemies for BPH management. The results showed that the model increased natural enemies for BPH, the density of major BPH predators such as spiders, mired bug and parasitoids of the model were maintained at the higher lever than the control at the seedling and tillering stages of the treatments of growing Alantanna camara and Melampodium paludosum on rice bunds. The wet season often infected pests more. The Shannon - Weiner index were highest at treatment of growing Lantanna camara and Melampodium paludosum on rice bunds.