Sugarcane is one of the most economically important crops in Brazil. The damage caused by Diatraea saccharalis (F.) (Lepidoptera: Crambidae) results in high costs for its production. Cotesia flavipes Cameron (Hymenoptera: Braconidae) is the most efficient means of controlling this pest. The prohibition of burning and the preservation of soil cover through non-tillage practices increased many population densities of natural enemies of the sugarcane borer (SCB) in sugarcane fields. Euborellia annulipes (Lucas) (Dermaptera: Anisolabididae) is a predator found in sugarcane fields and is associated with predation of SCB. This study aimed to evaluate the influence of parasitism of D. saccharalis by C. flavipes on predation by E. annulipes adult females. For this purpose, fourth instar sugarcane borer larvae were exposed to parasitism over a 5-day period or were not parasitized. Subsequently, the prey was supplied to the predator in arenas under choice and no-choice conditions and under different densities to evaluate the feeding preference over a 12-h period and functional response of the predator over a 24-h period. E. annulipes killed 2–3 fourth instar larvae of the sugarcane borer over a 12-h period. SCB parasitism did not affect the feeding preference of the predator and did not alter the type II functional response. However, the handling time of the predator was lower (1.943 h) and there was a higher T/T_h ratio on the non-parasitized larvae (12.352). Our findings indicate E. annulipes as a promising biological control agent of D. saccharalis, with a potential to assist in the sugarcane borer management approaches and could to reduce the costs of parasitoid release in the field.

中文翻译：

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环状腿Ear和甘蔗Bor虫幼虫之间的寄生关系介导的相互作用。

甘蔗是巴西最重要的经济作物之一。糖原虫（鳞翅目：鳞翅目）造成的损害导致其生产成本高昂。Cotesia flavipe s Cameron（膜翅目：Braconidae）是防治这种害虫的最有效手段。通过不耕作法禁止燃烧和保护土壤覆盖层，增加了甘蔗田中甘蔗bore虫（SCB）天敌的许多种群密度。Euborellia annulipes（Lucas）（Dermaptera：Anisolabididae）是在甘蔗田中发现的捕食者，与SCB的捕食有关。本研究旨在评估寄生的影响蔗由C.北美散白蚁捕食大肠杆菌的成年雌性。为了这个目的，四龄甘蔗bore虫幼虫在5天的时间内暴露于寄生虫中或没有被寄生。随后，在选择和无选择的条件下，以不同的密度，将猎物提供给竞技场中的食肉动物，以评估其在12小时内的觅食偏好和在24小时内掠食者的功能反应。在12小时内，环孢菌杀死了2-3个甘蔗蛀虫的四龄幼虫。SCB寄生虫不会影响捕食者的进食偏好，也不会改变II型功能反应。但是，捕食者的处理时间较短（1.943小时），T / T _h较高非寄生虫幼虫的比例（12.352）。我们的研究结果表明E. annulipes作为一个有前途的生物控制剂蔗，与潜在的协助蔗螟的管理办法，并可能减少寄生蜂释放的费用在现场。