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The firethorn (Pyracantha coccinea), a promising dead-end trap plant for the biological control of the spotted-wing Drosophila (Drosophila suzukii)
Biological Control ( IF 4.2 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.biocontrol.2020.104345
Romain Ulmer , Aude Couty , Patrice Eslin , Fausta Gabola , Olivier Chabrerie

Abstract The spotted-wing Drosophila, Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae), is an invasive pest which causes important damage to fruit crops. Despite significant economic and environmental harm, no satisfactory means of control have been found yet. One interesting option for the biological control of D. suzukii is the use of dead-end trap plants. These are attractive plant species that divert the pest away from infesting the main crop while being lethal for its offspring. Here we explored the efficiency of the firethorn Pyracantha coccinea as a dead-end trap plant for D. suzukii. We conducted experiments both in controlled laboratory conditions and in growhouses, offering conditions closer to the reality of the field. Our results show that the fruits of P. coccinea are highly attractive to D. suzukii while being invariably deadly for its offspring. The infestation rate of strawberries, a very attractive fruit commonly infested by D. suzukii, was reduced by 40% when firethorn fruits were present in the set-up. We also monitored the survival of D. suzukii offspring in P. coccinea fruits and observed that mortality occurred before pupation, mainly during the 2nd larval instar, along with a darkening of the larvae’s cuticle. Our results demonstrate the potential of P. coccinea in the biological control of D. suzukii. Indeed, planting firethorn near fruit crops could offer an efficient, durable and low-maintenance solution to reduce the damages caused by D. suzukii.

中文翻译:

火棘(Pyracantha coccinea),一种用于生物控制斑点翅果蝇(Drosophila suzukii)的有前途的死角陷阱植物

摘要 斑翅果蝇 Drosophila suzukii (Matsumura, 1931) (双翅目: Drosophilidae) 是一种入侵性害虫,对水果作物造成严重危害。尽管存在显着的经济和环境危害,但尚未找到令人满意的控制手段。D. suzukii 生物控制的一个有趣选择是使用死角陷阱植物。这些是有吸引力的植物物种,可以使害虫远离主要作物的侵扰,同时对其后代是致命的。在这里,我们探索了火棘火棘作为 D. suzukii 的死胡同陷阱植物的效率。我们在受控的实验室条件和种植园中进行了实验,提供了更接近田间现实的条件。我们的结果表明 P. coccinea 的果实对 D 具有很强的吸引力。suzukii 同时对其后代总是致命的。当设置中存在火棘果实时,草莓是一种非常有吸引力的水果,通常由 D. suzukii 感染,其感染率降低了 40%。我们还监测了 P. coccinea 果实中 D. suzukii 后代的存活情况,并观察到死亡发生在化蛹前,主要发生在第 2 幼虫龄期间,同时幼虫的角质层变黑。我们的结果证明了 P. coccinea 在 D. suzukii 的生物控制中的潜力。事实上,在水果作物附近种植火棘可以提供一种高效、耐用和低维护的解决方案,以减少 D. suzukii 造成的损害。当设置中存在火棘果实时,减少了 40%。我们还监测了 P. coccinea 果实中 D. suzukii 后代的存活情况,并观察到死亡发生在化蛹前,主要发生在第 2 幼虫龄期间,同时幼虫的角质层变黑。我们的结果证明了 P. coccinea 在 D. suzukii 的生物控制中的潜力。事实上,在水果作物附近种植火棘可以提供一种高效、耐用和低维护的解决方案,以减少 D. suzukii 造成的损害。当设置中存在火棘果实时,减少了 40%。我们还监测了 P. coccinea 果实中 D. suzukii 后代的存活情况,并观察到死亡发生在化蛹前,主要发生在第 2 幼虫龄期间,同时幼虫的角质层变黑。我们的结果证明了 P. coccinea 在 D. suzukii 的生物控制中的潜力。事实上,在水果作物附近种植火棘可以提供一种高效、耐用和低维护的解决方案,以减少 D. suzukii 造成的损害。
更新日期:2020-11-01
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