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Does spinetoram pose low risk to the neotropical lady beetle Eriopis connexa (Coleoptera: Coccinellidae)?
Phytoparasitica ( IF 1.4 ) Pub Date : 2020-03-19 , DOI: 10.1007/s12600-020-00802-x
Priscila Maria Gomes Costa , Roberta Leme dos Santos , Deividy Vicente do Nascimento , Jorge Braz Torres

Spinetoram is a new spinosyn recommended against lepidopteran and other defoliating species; while Eriopis connexa (Germar) preys upon aphids. To get additional control for defoliator and aphid species simultaneously it is worth to know the impact of spinetoram on the lady beetles. The impact of spinetoram on different stages of the lady beetle was studied using the field rates 0.08, 0.12, and 2-fold the highest field rate (0.24 g i.a./L). The study used two lady beetle populations: susceptible and resistant to pyrethroids, which is also recommended against defoliating pest species. Spinetoram applied on the egg masses resulted in similar development and hatching for spinetoram rates and lady beetle populations. Egg masses from resistant population treated with higher rates resulted in reduced survival for newly hatched larvae compared to untreated and the lower spinetoram rates. Lady beetle forage on treated surface for prey; but 4th- instar larvae confined on treated leaf exhibited similar developmental duration, pupation, and emergence rates. Larvae of similar age caged on treated leaves with aphids promoting dried residue and contaminated prey ingestion resulted in lower pupation rate at the highest spinetoram field rate for both lady beetle populations. Adult beetles from both populations caged on either spinetoram-dried residues or dried residues plus contaminated aphids exhibited similar egg production and survival. Therefore, responding the question raised with the study, spinetoram caused minor impact on lady beetle larvae and unnoticeable impact on adults; hence, can be another option for insecticide recommendation against lepidopteran larvae and still conserve the lady beetle.

中文翻译:

多杀菌素对新热带瓢虫 Eriopis connexa(鞘翅目:瓢虫科)的风险低吗?

Spinetoram 是一种新的多杀菌素,推荐用于对抗鳞翅目和其他落叶物种;而 Eriopis connexa (Germar) 捕食蚜虫。为了同时对落叶虫和蚜虫种类进行额外控制,有必要了解多杀菌素对瓢虫的影响。使用 0.08、0.12 和 2 倍最高场率 (0.24 g ia/L) 的场率研究了多杀菌素对瓢虫不同阶段的影响。该研究使用了两种瓢虫种群:对拟除虫菊酯敏感和具有抗性,这也被推荐用于对抗落叶害虫物种。多杀菌素应用在卵块上导致多杀菌素率和瓢虫种群的类似发育和孵化。与未处理和较低的多杀菌素率相比,来自抗性群体的卵块以较高的比率处理导致新孵化的幼虫的存活率降低。瓢虫在处理过的表面上觅食猎物;但限制在处理过的叶子上的 4 龄幼虫表现出相似的发育持续时间、化蛹和羽化率。年龄相近的幼虫笼养在处理过的叶子上,蚜虫促进干燥的残留物和受污染的猎物摄入,导致两种瓢虫种群在最高的刺杀虫剂田间率下化蛹率较低。笼养在多杀菌素干燥残留物或干燥残留物加上受污染的蚜虫的两个种群的成年甲虫表现出相似的产蛋量和存活率。因此,在回答研究中提出的问题时,Spintoram 对瓢虫幼虫造成轻微影响,对成虫影响不明显;因此,可以作为针对鳞翅目幼虫的杀虫剂推荐的另一种选择,并且仍然可以保护瓢虫。
更新日期:2020-03-19
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