Butcher Alexander, Rondon Silvia I, Lee Jana, Paul Ryan
Oregon Integrated Pest Management Center, Crop and Soil Sciences Department, Oregon State University, Corvallis, OR, USA.
Department of Horticulture, Oregon State University, Corvallis, OR, USA.
J Insect Sci. 2024 Nov 1;24(6). doi: 10.1093/jisesa/ieae112.
The Colorado Potato Beetle, Leptinotarsa decemlineata Say, is the principal defoliator of potato crops globally. It is well known for its propensity to rapidly develop resistance. Thus, new control options which are resilient to the pest's resistance capabilities are a critical need. The use of chemical ecology in integrated pest management (IPM) programs has been proposed as a means to delay resistance. Elicitors are chemical growth regulators that activate plant defenses. These plant defenses provide numerous opportunities to integrate chemical ecology into IPM programs, including changes to a plants volatile profile. In this laboratory study, we provide evidence that elicitors which mimic jasmonic acid (JA) and salicylic acid (SA) can be used to attract or repel L. decemlineata respectively. Adult beetles are highly attracted to potato plants sprayed with the JA mimicking elicitor Blush 2X, while plants sprayed with SA mimicking elicitor, Actigard 50WG, appear to be repellent. Additionally, residency time on plants sprayed with Actigard 50WG was significantly shorter than with control plants. The potential use of elicitors within IPM program is discussed.
科罗拉多马铃薯甲虫（Leptinotarsa decemlineata Say）是全球马铃薯作物的主要食叶害虫。它以极易产生抗性而闻名。因此，迫切需要新的、能抵御该害虫抗性能力的防治方法。有人提议在害虫综合治理（IPM）计划中运用化学生态学来延缓抗性。诱导子是激活植物防御的化学生长调节剂。这些植物防御为将化学生态学纳入IPM计划提供了众多机会，包括改变植物的挥发性成分。在这项实验室研究中，我们提供的证据表明，模拟茉莉酸（JA）和水杨酸（SA）的诱导子可分别用于吸引或驱避科罗拉多马铃薯甲虫。成年甲虫被喷洒了模拟JA的诱导子Blush 2X的马铃薯植株高度吸引，而喷洒了模拟SA的诱导子Actigard 50WG的植株似乎具有驱避作用。此外，甲虫在喷洒了Actigard 50WG的植株上的停留时间明显短于在对照植株上的停留时间。本文还讨论了诱导子在IPM计划中的潜在用途。
