›› 1998, Vol. 41 ›› Issue (4): 382-388.

• 研究论文 • 上一篇    下一篇

降水和灌溉对麦双尾蚜种群数量的影响

梁宏斌 张润志 张广学 文勇林 王国平   

  • 收稿日期:1998-02-09 出版日期:1998-11-20 发布日期:1998-05-20

INFESTATION LEVELS OF DIURAPHIS NOXIAMORDVILKO RESPONSE TO PRECIPITATION AND IRRIGATION

Liang Hongbin Zhang Runzhi Zhang Guangxue Wen Yonglin Wang Guoping   

  • Received:1998-02-09 Online:1998-11-20 Published:1998-05-20

摘要: 该文探讨了1989~1996年新疆塔城市麦双尾蚜Diuraphis noxia Mordvilko 年度间种群数量和降水量的关系,利用降水模拟方法分析降水因素对麦双尾蚜种群数量的影响,并调查了田间不同灌溉水平的植株上麦双尾蚜的数量。结果显示:6月下旬春麦田麦双尾蚜种群数量和当年4月份和5月份的降水总量存在明显负相关性(r=-0.92),与5月上旬和6月中旬降水总量存在明显负相关性(r=-0.78),并且与上年7月中下旬降水量存在明显正相关性(r=0.67),这些相关性表明4~5月份降水对麦双尾蚜种群增长不利,5~6月上旬降水对麦双尾蚜从冬麦迁入春麦不利,7月降水有利于麦双尾蚜种群增长,并依据4~5月降水量(X)和春麦田麦双尾蚜数量?建立了回归方程r=4.9-0.048X。田间和实验室内模拟降水可以明显降低麦双尾蚜种群数量。田间相对干旱地段麦双尾蚜数量明显高于湿润地段,并且干旱地段麦双尾蚜被菜蚜茧蜂Diaeretiella rapae Mintosh寄生的百分率相对较低。

关键词: 麦双尾蚜, 降水, 种群数量

Abstract: The infestation levels of Diuraphis noxia Mordvilko were investigated in correlation to the amount of rainfall in 1989-1996 in Xinjiang Uygur Autonomous Region. The effects of simulated rainfall on aphid population were observed both in the field and in the lab. D. noacia was sampled from fields at different irrigation levels. Theresults indicated that aphid infestation was negatively correlated to the amount of rainfall in April and May (r=-0.92), but positively correlated to the amount of rainfall inlate July of previous years (r=0.67). The amount of rainfall (X) in April and May was regressed with aphid population (Y) as Y= 4. 9-0.048X. The aphid population was significantly suppressed by stimulated rainfall in field and in lab experiments. Droughtstressed plants were infested with more aphids than drought-free plants. The percentage of D. Noxia parasitized by Diaeretieua rapae M'Intosh was greater on drought-freeplants than that on drought-stressed plants. (Tacheng Plant Protection Station, Tacheng 834700)Abstract The infestation levels of Diuraphis noxia Mordvilko were investigated in correlation to the amount of rainfall in 1989-1996 in Xinjiang Uygur Autonomous Region. The effects of simulated rainfall on aphid population were observed both in the field and in the lab. D. noacia was sampled from fields at different irrigation levels. Theresults indicated that aphid infestation was negatively correlated to the amount of rainfall in April and May (r=-0.92), but positively correlated to the amount of rainfall in late July of previous years (r=0.67). The amount of rainfall (X) in April and May wasregressed with aphid population (Y) as Y= 4. 9-0.048X. The aphid population was significantly suppressed by stimulated rainfall in field and in lab experiments. Drought-stressed plants were infested with more aphids than drought-free plants. The percentageof D. Noxia parasitized by DiaeretieUa rapae M'Intosh was greater on drought-free plants than that on drought-stressed plants.

Key words: Diuraphis noaxia Mordvilko, precipitation, population dynamic