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北方水稻和小麦种植区麦田灰飞虱种群发生动态及其带毒率研究
Population dynamics and viruscarrying rate of small brown planthopper, Laodelphax striatellus in northern paddyfields
徐艳博1,王孟伦2,朱金生1,韩兰芝3,陈法军1**
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DOI:
作者单位:1南京农业大学植物保护学院昆虫系南京210095;2南京农业大学食品科技学院南京210095;3中国农业科学院植物保护研究所北京100193
中文关键词:灰飞虱, 种群动态, 带毒率, 黑条矮缩病毒, 条纹叶枯病毒
英文关键词:Laodelphax striatellus, population dynamics, viruscarrying rate, rice black streaked dwarf virus, rice stripe virus
中文摘要:

灰飞虱Laodelphax striatellus (Fallén)是农业生产上的重要害虫之一,尤其是其传毒造成的危害更为严重。本文通过对山东省水稻种植区(包括稻麦轮作区与非轮作区)和小麦种植区灰飞虱田间种群发生量的系统调查、灯诱观测及其带毒率检测等得到如下研究结果:(1)与小麦种植区及水稻种植区非轮作麦田相比,稻麦轮作区麦田灰飞虱虫口密度高,可见稻麦轮作有利于灰飞虱种群发生危害;(2)山东省小麦种植区麦田灰飞虱仅发现携带黑条矮缩病毒,水稻种植区稻麦轮作田灰飞虱种群还检测到携带水稻条纹叶枯病毒;(3)灯诱高峰期灰飞虱带毒率与当地灰飞虱带毒率存在差异,说明有外来种群的迁入;(4)在检测的1 268头灯诱灰飞虱中只有1头体内同时检测到携带黑条矮缩病毒和水稻条纹叶枯病毒,可见灰飞虱可同时携带两种病毒,但概率极低。

英文摘要:

The small brown planthopper (SBPH) Laodelphax striatellus (Fallén) is a very important agricultural pest which can cause major harm to rice crops by acting as a vector of the rice stripe virus (RSV) and rice black streaked dwarf virus (RBSDV). In this study, the population dynamics of SBPH and its viruscarrying rate were systematically investigated and measured in ricewheat fields (rotation treatment vs. nonrotation treatment) in Shandong Province. The results indicate that (1) a higher SBPH density was found in the ricewheat rotation regions than in the nonrotation treatment, so it is presumed that SBPH favor the ricewheat rotation regions; (2) only RBSDV was detected in the SBPH from wheat fields, whereas both RBSDV and RSV were detected in SBPH from rice fields; (3) different viruscarrying rates were found between lighttrapped SBPH and the local SBPH population in Ningjin County; and, (4) from a total of 1 268 individuals tested, only one SBPH simultaneously carried both RBSDV and RSV, which indicates that SBPH can simultaneously carry both viruses but that such

individuals are relatively rare.

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