Vangansbeke Dominiek, Nguyen Duc Tung, Audenaert Joachim, Verhoeven Ruth, Gobin Bruno, Tirry Luc, De Clercq Patrick
Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
Entomology Department, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi, Vietnam.
Pest Manag Sci. 2016 Mar;72(3):466-73. doi: 10.1002/ps.4000. Epub 2015 Apr 13.
In integrated pest management systems in greenhouse crops, the predatory mite Amblyseius swirskii is becoming increasingly important as a biological control agent of various pests, especially thrips and whiteflies. An emerging strategy to promote the predator's establishment and retention in the crop consists in providing food supplements. However, when faced with omnivorous pests, such as the western flower thrips, Frankliniella occidentalis, food supplements need to be applied with extreme care, in order not to boost population growth of the pest. This laboratory study was conducted to evaluate the impact of commercial products of Typha angustifolia pollen and decapsulated brine shrimp cysts (Artemia sp.) on populations of both pest and predator and on predator-prey interactions.
Pollen was highly supportive for both F. occidentalis and A. swirskii, whereas Artemia cysts supported thrips populations to a lesser extent than those of the predator. Furthermore, a less pronounced reduction in thrips consumption by A. swirskii was observed in the presence of Artemia cysts as compared with T. angustifolia pollen.
Artemia might be a valuable alternative to pollen for supporting populations of A. swirskii in order to improve thrips management, as they are less beneficial for the pest but do support population growth of A. swirskii.
在温室作物的综合害虫管理系统中，捕食螨斯氏钝绥螨作为多种害虫，尤其是蓟马和粉虱的生物防治剂，正变得越来越重要。促进捕食者在作物中定殖和留存的一种新兴策略是提供食物补充剂。然而，当面对杂食性害虫，如西花蓟马时，需要极其谨慎地施用食物补充剂，以免促进害虫种群增长。本实验室研究旨在评估狭叶香蒲花粉和去壳卤虫囊肿（卤虫属）商业产品对害虫和捕食者种群以及捕食者与猎物相互作用的影响。
花粉对西花蓟马和斯氏钝绥螨都有高度的支持作用，而卤虫囊肿对蓟马种群的支持程度低于对捕食者的支持程度。此外，与狭叶香蒲花粉相比，在有卤虫囊肿存在的情况下，观察到斯氏钝绥螨对蓟马的捕食量减少不太明显。
卤虫可能是花粉的一种有价值的替代品，用于支持斯氏钝绥螨种群以改善蓟马管理，因为它们对害虫的益处较小，但确实能支持斯氏钝绥螨种群的增长。
