Selection of parasitoids of the genus Trichogramma (Hymenoptera: Trichogrammatidae) and parasitism at different eggs ages of Duponchelia fovealis (Lepidoptera: Crambidae)
Selection of parasitoids of the genus Trichogramma (Hymenoptera: Trichogrammatidae) and parasitism at different eggs ages of Duponchelia fovealis (Lepidoptera: Crambidae)
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DOI：
10.4025/actascibiolsci.v40i1.42216
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发表时间：
2018-01-01
期刊：
影响因子：
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通讯作者：
Oliveira de Freitas Bueno, Regiane Cristina
中科院分区：
文献类型：
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作者：
Pereira Paes, Joao Paulo;Souza Lima, Victor Luiz;Oliveira de Freitas Bueno, Regiane Cristina
欧洲胡椒蛾Duponchelia fovealis(Zeller，1847)(鳞翅目：Crambitae)，尽管是巴西草莓的主要害虫之一。然而，对这种害虫的生物防治方法很少有文献记载。在目前的研究中，目标是选择有希望的赤眼蜂菌株，以实现对微囊蜂的控制，并确定该寄生蜂对不同年龄寄主卵子的接受程度。在第一次生物测定中，对5个赤眼蜂品系和1个赤眼蜂品系(膜翅目：赤眼蜂科)的生物学参数进行了评价。菌株Tp18和Tg的寄生率和存活率最高，分别达到50%和90%以上。另一种生物测定表明，这两种虫种(Tp18和Tg)都能接受不同年龄的黄斑潜蝇卵。所有寄主日龄均被普氏锥虫(Tp18)和格氏锥虫所接受，且偏爱幼虫卵(65%)。成虫羽化、每卵个体数和性别比与寄主年龄无显著差异。本研究为赤眼蜂种群在不同龄期中心凹赤眼蜂卵上的选择和表现提供了相关数据。
The European pepper moth Duponchelia fovealis (Zeller, 1847) (Lepidoptera: Crambidae), despite being among the principal pests of strawberries in Brazil. However, biological control methods are rarely documented for this pest. In the current study, the goal was to select promising Trichogramma strains to enable the control of D. fovealis and to determine the acceptance of different ages of host eggs by the parasitoid. In the first bioassay, evaluations were done on the biological parameters of five strains of Trichogramma pretiosum Riley and one of Trichogramma galloi Zucchi (Hymenoptera: Trichogrammatidae). The best performance came from the strains, Tp18 (T. pretiosum) and Tg (T. galloi), showing parasitism and viability higher than 50 and 90%, respectively. Another bioassay revealed the acceptance of both these species (Tp18 and Tg) for different ages of D. fovealis eggs. All host ages were accepted by T. pretiosum (Tp18) and T. galloi, with a preference for younger eggs (65% parasitism). Adult emergence, number of individuals per egg and sex ratio revealed no significant differences with respect to the host age. The current study provides pertinent data on the selection and performance of Trichogramma species on D. fovealis eggs of different ages.