几个粳稻品种抗白背飞虱的研究

本研究用苗期群体鉴定法对若干水稻品种进行了抗白背飞虱(Sogatella furcifera)比较测定,并探讨籼、粳稻品种抗性差异和粳稻抗性性质.结果指出:在供试“80079”,“中国91”、“盐粳2号”等粳稻品种上,白背飞虱生物学表现明显不同.粳稻抗性可分两类:(1)“80079”对白背飞虱取食、生存、发育没有抗生作用,对种群为害还表现有耐虫性;(2)“中国91”、“盐粳2号”对白背飞虱取食、生存、发育没有抗生作用,但却有一定的拒产卵机制,对种群为害还兼有耐虫性,从而能有效地抑制白背飞虱种群的建立.

STUDIES ON THE RESISTANCE OF JAPONICA RICE VARIETIES TO WHITE-BACKED PLANTHOPPER SOGATELLA FURCIFERA (HORVATH)

The white-backed planthopper Sogatzlla furcifera (Horvath) is one of the major pests on rice. Studies were conducted on the resistance of japonica rice varieties to this planthopper, with the aim to utilize the resistant variety in. areas where both indica and japonica rices are-grown. The results revealed that according to the nature of resistance, the MR japonica rice varieties can be divided into two groups: 1, Japonica nre varieties like "80079" have detrimental effci on feeding, suvival, development and oviposition of the planthopper. Thus, the plant-hopper population density on these rice vaiieiie& was obviously lower than that OR the indica. variety TN1 which was used as a susceptible check. They showed the presence of antibiosis-anil tolerance. 2. The japonica rice varieties like "Chinese 91", "Yeng keng 2" bad no detoi menal effect on the survival and development of the planthopper, but the oviposition and the development of the population were apparently inhibited, due to the non-preference of oviposi-tion by the planrhoppcr and the tolerance of the rice. If was observed that the smaller population of the planthopper on the japonica nee varieties was caued by the non-preferance of ovi-position, rice tolerance and activity of natural enemies in the field.