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The rice planthopper,including brown plan-thopper(Nilaparvata hugens Stal)and white-backed planthopper(Sogata furcifera Hor-vath),is one kind of tropical pests.They im-migrate with the southeast monsoon from low-latitude area into China at March or April.The global climatic anomaly especially the E1
The rice planthopper, including brown plan-thopper (Nilaparvata hugens Stal) and white-backed planthopper (Sogata furcifera Horvath), is one kind of tropical pests. They im-migrate with the southeast monsoon from low-latitude area into China at March or April. The global climatic anomaly especially the E1