Effects of Temperature,Humidity and Different Rice Growth Stages on Vertical Migration of Aphelenchoides besseyi  

作　　者：SUN Min-jie LIU Wei-hong LIN Mao-song 

机构地区：[1]Plant Protection College, Nanjing Agricultural University, Nanjing 210095, China [2]Jiangdu Agricultural Technology Extension and Service Centre, Jiangsu 225200, China

出　　处：《Rice science》2009年第4期301-306,共6页水稻科学（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (Grant No. 2001AA249021)

摘　　要：The vertical migration of Aphelenchoides besseyi under different temperatures and humidities and at different rice growth stages was investigated. It was found that the optimum temperature for the development and reproduction of A. besseyiwas 25-30℃. At the same temperature, the rate of vertical migration increased with rising relative humidity. Artificial inoculation tests showed that at the elongation stage, nematodes survived mainly on the upper and middle parts of rice culms and the number of nematodes decreased by 50% at 20 days after inoculation compared with that at 5 days after inoculation. Whereas at the booting stage, nematodes accumulated in young panicles and reproduced quickly,, and the average number of nematodes at 20 days after inoculation increased to 164.5, three times of that at 5 days after inoculation.The vertical migration of Aphelenchoides besseyi under different temperatures and humidities and at different rice growth stages was investigated. It was found that the optimum temperature for the development and reproduction of A. besseyiwas 25-30℃. At the same temperature, the rate of vertical migration increased with rising relative humidity. Artificial inoculation tests showed that at the elongation stage, nematodes survived mainly on the upper and middle parts of rice culms and the number of nematodes decreased by 50% at 20 days after inoculation compared with that at 5 days after inoculation. Whereas at the booting stage, nematodes accumulated in young panicles and reproduced quickly,, and the average number of nematodes at 20 days after inoculation increased to 164.5, three times of that at 5 days after inoculation.

关 键 词：Aphelenchoides besseyi RICE growth stage TEMPERATURE humidity vertical migration DISTRIBUTION 

分 类 号：S435.112[农业科学—农业昆虫与害虫防治] S435.112.3[农业科学—植物保护]