Abstract:

Yield loss is caused by brown plant hopper are becoming more and more serious in recent years. By analyzing the changes of rice cropping system and the occurring dynamics of the insect, new ideas and control strategies are forwarded: (1) The plant brown hopper that imperil the rice production in China might survive overwinter to north latitude of 19oN, but the disastrous insect source mainly comes from the south of 16oN, especially from the Mekong Delta of south Vietnam and Thailand. (2) Rampant of BPH might relate to the following factors: the expansion of rice growing area in Asean countries, substitution of high-stem type by dwarf type, multi-cropping seasons every year, higher planting density and fertilizer input, overlap of growth stage, utilization of susceptible rice varieties, extra use of pesticide, global warming that infavor of the reproduction and migration of the insects. Control strategies: push forward the defense frontline to the birthland, Mekong Delta, by implementing integrated pest control focused on regional ecology management: reducing the winter season rice growth area, setting up tropical fruit and cash crop producing base, international cooperation on BPH control, eliminating the migrating insects by seducing them in a confined trap.