在25℃温度条件下，在九里香（Murraya panicuata）嫩枝条上研究柑橘木虱Diaphorina citri Kuwayama混合虫态、卵、低龄若虫、高龄若虫

、柑橘木虱分泌物对胡瓜新小绥螨Neoseiulus cucumeirs（Oudemans）雌螨的吸引作用，以探索与评价捕食螨对柑橘木虱各虫态及分泌物的趋

向性。研究发现：1. 柑橘木虱混合虫态对胡瓜新小绥螨的吸引作用在试验后第2小时经测验达到显著水平（P<0.05），第3小时达极显著水平

（P<0.01），表明柑橘木虱混合虫态对胡瓜新小绥螨有很强的吸引作用；2.柑橘木虱卵对胡瓜新小绥螨雌成螨无吸引作用；3. 试验开始后第

1~5小时在试验区胡瓜新小绥螨数量分别高于空白区2500%、1833%、1333%、1500%和2333%，柑橘木虱低龄若虫对胡瓜新小绥螨有较

强烈的吸引作用；4. 柑橘木虱高龄若虫对胡瓜新小绥螨吸引作用在第1小时最高，第2~3小时最低，第4小时开始回升，第5小时可达到5167%

。可见柑橘木虱高龄若虫对胡瓜新小绥螨有一定的吸引作用；5. 柑橘木虱分泌物对胡瓜新小绥螨吸引作用在第1小时最高，试验区胡瓜新小绥

螨数量高于空白区3333%、胡瓜新小绥螨不能取食柑橘木虱分泌物，第2小时胡瓜新小绥螨向外逃跑的比率增加。但胡瓜新小绥螨在试验区数

量仍高于试验区，柑橘木虱分泌物对胡瓜新小绥螨也有一定的吸引作用。本试验环境开放，模拟自然状态。在柑橘木虱混合虫态发生的情况下

，胡瓜新小绥螨对其具备搜寻能力。

• Movements of the predatory mite Neoseiulus cucumeris (Oudemans) toward different life stages and secretions of Diaphorina
• citri Kuwayama were investigated an open environment,simulating natural conditions. The response of adult female N.
• cucumeris to different life stages of D. citri and to the secretions of D. citri on Murraya panicuata shoots was studied
• using choice tests at 25℃. The results were：1. Female N. cucumeris showed a significant response to mixed life stages of
• D. citri after two hours and a highly significant response after three hours,indicating that the response to mixed life
• stages of D. citri is very strong. 2. Female N. cucumersi were not attracted to D.citri eggs. 3. Hourly counts of the
• numbers of female N. cucumeris on shoots with young D. citri nymphs in the first five hours of the experiment were, 25
• 00%,1833%,1333%,1500% and 2333% higher,respectively,than those on control shoots without D. citri nymphs. 4. The
• response of predators to old D. citri nymphs was highest at the end of the first hour of the experiment and lowest during
• the second and third hours. The proportion of predators began to rebound during the fourth hour and had increased to
  5167% by the end of fifth hour. This shows that old D. citri nymphs are attractive to N. cucumeris. 5. In trials using
• secretions of D.citri,the number of predators on shoots with secretions was 3333% higher than on control shoots,one hour
• after the start of the experiment. At the end of two hours,the proportion of predators departing the treatment shoot had
• increased but the number on treatment shoots remained higher than on control shoots. This result shows that females of N.
• cucumersi are attracted to secretions of D.citri.
•