稻飞虱是严重危害早稻的主要害虫之一。由于稻飞虱虫体小,一般在稻苗下部危害,常常被忽视而不能及时防治造成严重减产。一、危害特点经我所多年的试验研究,旱稻自分蘖至拨节,被害植株轻者在茎杆上呈现不规律棕褐色斑点,稻苗长势见弱;重者茎杆下部呈黑褐色,直至枯死,未枯死的植株常不能抽穗,能抽穗的也不能正常灌浆,造成减产,甚至绝收。旱稻一般在8月初至中旬为稻飞虱发生盛期,其特点是稻田中央一般比田边发生较重,植株柔嫩茂密比稀植的重,草荒或靠近草荒田境、渠边的稻田发生也较重。第一代稻飞虱产卵最多,第一代雌虫所产卵块,孵化率高,孵出的若虫也最多。因此, Planthopper is one of the major pests that seriously endanger early rice. Due to the small planthopper, the general damage in the lower rice seedlings are often overlooked and can not be controlled in time to cause serious cuts. First, the hazardous characteristics of our many years of experimental study, Upland rice from tillering to dial, the victim plants showed irregular tan spots on the stalks, rice seedlings see weak; heavy stem dark brown lower until Dead, dead plants often can not be heading, heading can not be normal filling, resulting in reduced production, or even absolute. Upland rice generally occurs in early August and mid-term for the occurrence of rice planthoppers, which is characterized by heavier occurrences in the center of the paddy field than in the Tanabe area. The plants are tender and dense and dense than the sparsely planted ones. Heavier The first generation of planthoppers lay the most eggs, the first generation of eggs laid by females, hatching rate is high, the most hatched nymphs. therefore,