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Chemical-based strategies to control the western corn rootworm, Diabrotica virgifera virgifera LeConte
Crop Protection ( IF 2.8 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.cropro.2020.105306
Chiara Ferracini , Massimo Blandino , Ivo E. Rigamonti , Costanza Jucker , Enrico Busato , Matteo A. Saladini , Amedeo Reyneri , Alberto Alma

Abstract The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is one of the most severe pests of cultivated maize, Zea mays L. Most of the damage to this crop is caused by larvae feeding on the root system, causing important economic costs in terms of yield losses and management efforts. This research was carried out to evaluate the effect of different chemical control strategies to minimize larval damage in maize fields under natural infestation of the pest. Field-based research was performed in a two-year period (2011–2012) in five locations of northern Italy. Different insecticide strategies (belonging to the pyrethroid, neonicotinoid or organophosphate classes) were compared to an untreated control. The effects on larval infestation, root damage, silage and grain yield were assessed. Our data highlighted that insecticide application at sowing led to a significant reduction in the WCR larval density, both considering insecticide seed treatments and in-furrow soil applications. In particular, seed-applied clothianidin (systemic) and tefluthrin (non-systemic) applied at sowing led to a maximum increase in grain yield of 18% and 19% respectively, when compared to the untreated control. In all the surveyed plots, limited plant lodging was observed. Furthermore, while the silage yield did not significantly differ among untreated and treated plots, significant differences were recorded with regard to grain yield. No significant results occurred with the liquid insecticide applied in the intra-row space at ridging, with regard to reduction in WCR larval density and grain yield.

中文翻译:

控制西部玉米根虫 Diabrotica virgifera virgifera LeConte 的化学策略

摘要 西部玉米根虫 (WCR) Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) 是栽培玉米 Zea mays L 最严重的害虫之一。该作物的大部分危害是由幼虫以根系为食造成的。 ,在产量损失和管理工作方面造成重要的经济成本。本研究旨在评估不同化学防治策略在害虫自然侵染下最大限度地减少玉米田幼虫损害的效果。在意大利北部的五个地点进行了为期两年(2011-2012 年)的实地研究。将不同的杀虫剂策略(属于拟除虫菊酯、新烟碱类或有机磷类)与未处理的对照进行比较。评估了对幼虫侵染、根损伤、青贮饲料和谷物产量的影响。我们的数据强调,考虑到杀虫剂种子处理和犁沟土壤应用,播种时施用杀虫剂导致 WCR 幼虫密度显着降低。特别是,与未处理的对照相比,播种时施用的种子施用噻虫胺(系统性)和七氟菊酯(非系统性)分别导致谷物产量最大增加 18% 和 19%。在所有调查的地块中,观察到有限的植物倒伏。此外,虽然未经处理和处理过的地块的青贮产量没有显着差异,但记录到谷物产量的显着差异。将液体杀虫剂用于行间垄间空间,在降低 WCR 幼虫密度和谷物产量方面没有显着效果。
更新日期:2021-01-01
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