Wijayaratne Leanage K W, Burks Charles S
Department of Plant Sciences, Faculty of Agriculture, Rajarata University of Sri Lanka, Puliyankulama, Anuradhapura 50000, Sri Lanka.
USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, 9611 South Riverbend Avenue, Parlier, CA 93648, USA.
Insects. 2020 Oct 14;11(10):701. doi: 10.3390/insects11100701.
The Indian meal moth (Hübner) (Lepidoptera: Pyralidae), is controlled by commercial mating disruption dispensers using passive release to emit high concentrations (relative to females or monitoring lures) of their principal sex pheromone component, (9Z,12)-tetradecadienyl acetate. Since is sexually active throughout the scotophase, an assay system was developed to determine the importance of direct interaction of the male with the dispenser, and whether exposure to mating disruption early in the night is sufficient to suppress mating throughout the night. Exposure to mating disruption dispensers in the mating assay chamber for the first two hours of a 10-h scotophase significantly reduced mating when females were introduced four hours later. Mating was also reduced to a lesser degree in a concentration-dependent manner based solely on re-emission of pheromone, and when males were exposed outside the mating assay chamber. These results indicate that the commercial mating disruption dispensers can suppress mating throughout the night based on interaction with the dispenser early in the night. Desensitization resulting from attraction to a high-concentration pheromone source is important to this suppression, but other factors such as re-emission from the environment may also have a role. These observations imply a non-competitive mechanism for with the product studied, and suggest that effectiveness of the mating disruption dispenser might be augmented by using them in conjunction with another formulation such as an aerosol or micro-encapsulated product.
印度谷螟（Hübner）（鳞翅目：螟蛾科）可通过商业性的交配干扰器来控制，该干扰器采用被动释放方式，释放高浓度（相对于雌虫或监测诱捕剂）的主要性信息素成分，即（9Z,12）-十四碳二烯乙酸酯。由于印度谷螟在整个暗期都具有性活性，因此开发了一种测定系统，以确定雄虫与干扰器直接相互作用的重要性，以及在夜间早期接触交配干扰是否足以抑制整个夜间的交配行为。在10小时暗期的前两个小时，将雄虫置于交配测定室中接触交配干扰器，当4小时后引入雌虫时，显著降低了交配率。仅基于性信息素的再释放，以及当雄虫在交配测定室外接触时，交配率也以浓度依赖的方式有较小程度的降低。这些结果表明，商业交配干扰器可基于夜间早期与干扰器的相互作用来抑制整个夜间的交配行为。对高浓度性信息素源的吸引导致的脱敏作用对这种抑制很重要，但其他因素，如环境中的再释放也可能起作用。这些观察结果暗示印度谷螟与所研究产品之间存在非竞争性机制，并表明交配干扰器与气雾剂或微胶囊产品等另一种制剂联合使用，可能会增强其有效性。
