Impact of secondary parasitism on Aphidius colemani in the banker plant system on aphid control in commercial greenhouses in Kochi, Japan
Impact of secondary parasitism on Aphidius colemani in the banker plant system on aphid control in commercial greenhouses in Kochi, Japan
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银行家植物系统中蚜虫的次生寄生对日本高知商业温室蚜虫控制的影响
DOI：
10.1303/aez.2010.541
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发表时间：
2010
影响因子：
1.3
通讯作者：
Toshihiro Okabayashi
中科院分区：
文献类型：
--
作者：
K. Nagasaka;Naoyuki Takahasi;Toshihiro Okabayashi
为了阐明次生寄生对银行家植物系统的影响，在日本高知县生产茄子和甜椒的商业温室中对银行家植物上的寄生蚜虫进行了四年的调查。 11 月或 12 月将使用 Aphidius colemani 的银行家植物系统引入温室，以控制 2 月至 5 月的害虫蚜虫。早季时，银行家植物上替代寄主蚜虫（Rhopalosiphum padi）的次生寄生蜂占总寄生蜂的平均比例低于35%。 3、4月份平均比率超过40%，5、6月份则超过70%。次生寄生蜂的三个主要种类，Alloxysta sp。 nr victrix、Dendrocerus laticeps 和 Syrphophagus sp. 整个季节都有发生。此外，Asaphes suspensus 和 Pachynouron 蚜虫也出现在该季节后期。在银行家植物系统控制蚜虫失败的温室中，银行家植物次生寄生的增加比成功控制蚜虫的温室更急剧。 3、4月份，银行家植株次生寄生率较高，对蚜虫防治失败影响显着。
In order to elucidate the impact of secondary parasitism on a banker plant system, aphid parasitoids on banker plants were surveyed for four years in commercial greenhouses producing eggplant and sweet pepper in Kochi Prefecture, Japan. A banker plant system using Aphidius colemani was introduced into the greenhouses in November or December for the control of pest aphids from February through May. The mean rate of secondary parasitoids to total parasitoids on the alternative host aphid (Rhopalosiphum padi) on banker plants was less than 35% in the early season. In March or April, the mean rate exceeded 40%, and was more than 70% by May or June. Three main species of secondary parasitoids, Alloxysta sp. nr victrix, Dendrocerus laticeps and Syrphophagus sp., occurred throughout the season. In addition, Asaphes suspensus and Pachynouron aphidis occurred later in the season. In greenhouses where the banker plant system of aphid control failed, the increase of secondary parasitism on banker plants was sharper than in greenhouses with successful aphid control. In March and April, the higher rates of secondary parasitism on banker plants had a significant influence on the failure of aphid control.