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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Investigations on Natural Enemies, Some Biological Characteristics and Population Fluctuations of Lepidosaphes ulmi (L.) (Homoptera, Coccidae) Harmful
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Investigations on Natural Enemies, Some Biological Characteristics and Population Fluctuations of Lepidosaphes ulmi (L.) (Homoptera, Coccidae) Harmful

机译：关于天敌，鳞翅目（鳞翅目）有害生物的某些生物学特性和种群波动的调查

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This study was carried out from 1991 to 1993, in Van province (Erci?, Edremit, Geva?), which aimed to find out the population fluctations, some biological characteristics and natural enemies of L. ulmi and P. bituberculatum harmfull to apple trees. Samples were collected periodically every 15 day from 7 trees (Starting variety) in every orchard determined in Geva?, Edremit and Erci?. All the biological stages, either alive or death, of pests, parasitized individuals and natural enemies were counted on the branches or leaves infested. According to the results obtained, it was determined that L. ulmi and P. bituberculatum overwintered as egg stage on apple trees in Van province. They reproduced sexually and have one generation a year. The average number of eggs laid per female for L. ulmi and P. bituberculatum were determined as 50(9-90)eggs and 259(14-646) eggs, respectively. The mobile nymphes of two species, which were the most susceptible stage to insecticide, were found in orchards in May. Aphytis mytilaspidis (Le Baron) and Hemisarcoptes malus (Shimer) were faund to be the most effective natural enemies of L. ulmi. A parasitoid, Coccophagus palaeolecanii Jasn. was obtained from P. bituberculatum, but it was observed that its population was very low.
机译：这项研究于1991年至1993年在范省（Erci？，Edremit，Geva？）进行，目的是了解对苹果树有害的ulmi和P. bituberculatum的种群变动，某些生物学特征和天敌。 。每隔15天从Geva？，Edremit和Erci？确定的每个果园中定期从7棵树（起始品种）中收集样品。害虫，被寄生的个体和天敌的所有生物学阶段，无论是存活还是死亡，都在被感染的树枝或树叶上计数。根据获得的结果，确定范氏省的苹果树上的ulmi和P. bituberculatum越过卵期越冬。他们有性繁殖，一年生育一代。 ulmi和P. bituberculatum的每只雌性产卵的平均数量分别为50（9-90）个鸡蛋和259（14-646）个鸡蛋。五月份在果园中发现了两种最易受杀虫剂影响的流动若虫。 Aphytis mytilaspidis（Le Baron）和Hemisarcoptes malus（Shimer）被认为是ulmi ulmi最有效的天敌。拟寄生虫，球藻palaeolecanii Jasn。该菌是从毕赤假单胞菌（P.bituberculatum）获得的，但观察到其种群非常低。

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