Pieterse Zelda, Buitenhuis Rosemarie, Liu Jun, Fefer Michael, Teshler Inna
University of Guelph, 4890 Victoria Avenue North, Vineland Station, ON L2R 2E0, Canada.
Vineland Research and Innovation Centre, 4890 Victoria Avenue North, Vineland Station, ON L2R 2E0, Canada.
Antibiotics (Basel). 2023 Mar 2;12(3):495. doi: 10.3390/antibiotics12030495.
Many common insect pests have developed resistance against the pesticides currently available, to the point where pest and disease management has become extremely difficult and expensive, increasing pressure on agriculture and food production. There is an urgent need to explore and utilize alternatives. Due to their unique mode of action, photosensitizers may be able to control insect pests effectively, especially in combination with oil-based products, without the risk of resistance build-up. In this study, the efficacy of a mineral oil-based horticultural spray oil, PureSpray™ Green (PSG), and a sodium magnesium chlorophyllin photosensitizer formulation, SUN-D-06 PS, were evaluated and compared to a registered cyantraniliprole insecticide (as positive control) and a negative control against western flower thrips (WFT), . In detached leaf ingestion assays, PSG at high concentration was more effective than low concentration, causing >70% WFT mortality, whilst SUN-D-06 PS + PSG caused higher mortality than cyantraniliprole after five days of feeding. The same combination was as effective as cyantraniliprole in the contact assay. In greenhouse pepper, the photosensitizer decreased the WFT more than mineral oil applied alone, whilst a combination treatment of SUN-D-06 PS + PSG was most effective, decreasing the WFT population to fewer than four WFT per plant. SUN-D-06 PS + PSG shows promise as a sustainable, economical way of controlling WFT, with the potential to be incorporated into existing integrated pest (and disease) management (IPM) programs with ease.
许多常见害虫已对目前可用的杀虫剂产生抗性，以至于病虫害管理变得极其困难且成本高昂，给农业和粮食生产带来了越来越大的压力。迫切需要探索和利用替代方法。由于其独特的作用方式，光敏剂或许能够有效控制害虫，尤其是与油基产品联合使用时，不存在产生抗性的风险。在本研究中，评估并比较了一种基于矿物油的园艺喷雾油PureSpray™ Green（PSG）和一种叶绿素铜钠盐光敏剂制剂SUN-D-06 PS，与一种已登记的氰虫酰胺杀虫剂（作为阳性对照）以及针对西花蓟马（WFT）的阴性对照的效果。在离体叶片摄入试验中，高浓度的PSG比低浓度更有效，导致超过70%的西花蓟马死亡，而SUN-D-06 PS + PSG在喂食五天后导致的死亡率高于氰虫酰胺。在接触试验中，相同的组合与氰虫酰胺效果相当。在温室辣椒中，光敏剂比单独施用矿物油能更有效地减少西花蓟马数量，而SUN-D-06 PS + PSG的组合处理最为有效，将西花蓟马数量减少到每株植物少于四只。SUN-D-06 PS + PSG有望成为一种可持续、经济的控制西花蓟马的方法，有潜力轻松纳入现有的综合病虫害管理（IPM）计划。
