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首页> 外文期刊>Journal of Biological Control >Dispersal Pattern of Trichogramma chilonis Ishii in Sugarcane Field
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Dispersal Pattern of Trichogramma chilonis Ishii in Sugarcane Field

机译：甘蔗田中赤眼石楠分布模式

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摘要

The ability of the laboratory-reared egg parasitoid, Trichogramma chilonis Ishii to disperse and locate sentinel egg cards in sugarcane field was evaluated. The dispersal behaviour was monitored at different crop ages of 45 days, 3 months, 5 months, 7 months and 9 months through egg-parasitism in sentinel cards with Corcyra cephalonica (Stainton) eggs in 24 h time. The sentinel cards were placed at distances of 1, 3, 5, 7, 10, 12, 15, 20, 25 and 30 m in eight cardinal directions from the release point of the parasitoid. The effects of distance from the release point, wind direction and crop age on the host location were evaluated. Distance had a clear proportional impact on the dispersal probability but this association was complicated by the fact that distance effects changed with crop age. The dispersal of the parasitoid was found to be the highest in 45 days old crop and the lowest in 7 months old crop. The parasitoid was found to move up to 10m effectively up to 5 months of crop age which declined thereafter. Although dispersal was found up to 30m, more uniform parasitism was observed in 10m circle surrounding the release point. The direction of wind was not associated with the rate of dispersal. The influence of distance, direction and age of the crop on adult emergence was not found to vary distinctly. The inference of differential ability of the parasitoid to move in the sugarcane field in securing uniform dispersal and in fixing adequate number of release points for inundative releases are discussed.
机译：评估了实验室饲养的卵寄生虫（Trichogramma chilonis Ishii）在甘蔗田中散布和定位前哨卵卡的能力。通过在24小时内用带有头皮Corcyra cephalonica（Stainton）卵的前哨卡中的卵寄生来监测不同作物年龄（45天，3个月，5个月，7个月和9个月）的扩散行为。哨点卡放置在从寄生虫的释放点开始的八个基本方向上分别与1、3、5、7、10、12、15、20、25和30 m的距离处。评估了距释放点的距离，风向和作物年龄对寄主地点的影响。距离对散布概率具有明显的比例影响，但是距离效应随作物年龄的变化而变化，这一关联变得复杂。发现在45天大的农作物中，该寄生虫的扩散最高，而在7个月大的农作物中，该寄生虫的扩散最低。发现该寄生虫在作物年龄的5个月内有效地移动了10m，此后下降了。尽管在30m处发现了扩散，但在释放点周围的10m圈内观察到了更均匀的寄生现象。风的方向与扩散速度无关。没有发现作物的距离，方向和年龄对成年出苗的影响有明显的不同。讨论了寄生虫在甘蔗田中移动的能力差异的推论，以确保均匀的分散和固定足够数量的释放点以进行过度释放。

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