水稻品种南京14号对褐飞虱定位和繁殖的影响

应用稻苗生物测定法，比较了水稻抗虫品种南京１４号、ＩＲ２８，感虫品种南京１１号、ＴＮ１和汕优６３，非寄主植物稗草对褐飞虱定向和繁殖的影响。

THE INFLUENCE OF RESISTANT RICE VARIETY NJ 14 ON ORIENTATION AND MULTIPLICATION OF BROWN PLANTHOPPER(BPH),Nilaparvata lugens(Stal)

Factors influencing brown planthopper(BPH) orientation and multiplication in NJ 14 were studied by the comparative bioassay with 4 other rice varieties of different resistant levels and the barnyard grass. It was found that when the host plantS were wrapped with parafilm M to confine something volatile, the number of BPH settling down on the barnyard grass, an unsuitable host, increased, and the number decreased on NJ 11, TNI and SY 63,susceptible rice hosts, but remained unchanged on NJ 14 and IR 28, resistant rice varieties. This indicated that the barnyard grass might have some volatile repellents, and susceptible rice hosts might have some attractsnts. but resistant rice varieties, NJ 14 and IR 28, might have nothing volatile to influence BPH orientation. The fact that BPH laid fewer eggs in NJ 14 and IR 28 implied that there must be some factors hindering BPH oviposition on these resistant rice varieties. The eggs could develop to nymphs within the normal egg duration on resistant rice varieties, but the egg hatchability rate was lower because of their poor nutrition, resulting from their parents feeding on resistant rice.