PDF(Pubmed)
Abstract：
Neoseiulus bicaudus is a predatory mite species that could potentially be used for the biological control of spider mites and thrips. Floral resources can provide excellent habitats and abundant nutrients for natural enemies. The objective of this experiment was to evaluate the effects of eight floral resources on the longevity, fecundity, and predation ability of N. bicaudus. Among the considered plants, Cnidium monnieri led to the highest longevity (24 days) and fecundity (13.8 eggs) of N. bicaudus, while Tagetes erecta resulted in the lowest longevity (7 days) and fecundity (0.1 eggs) observed in the predatory mites. By comparing the effects of three nectar and pollen plants on the predation of predatory mites, it was observed that N. bicaudus still exhibited a type II functional response to Tetranychus turkestani. In the presence of pollen, the predation efficacy (a/Th) of N. bicaudus exhibited a lower value, compared to that in the absence of pollen (Control: a/Th = 24.00). When pollen was supplied, the maximum consumption (1/Th) of predatory mites was higher than in its absence (Control: 1/Th = 9.90 d-1), with the highest value obtained in the presence of B. officinalis pollen (B. officinalis: 1/Th = 17.86 d-1). The influence coefficient of predation of N. bicaudus on T. turkestani in the presence of pollen was compared in the presence of three nectar and pollen plants: Cnidium monnieri, Centaurea cyanus, and Borago officinalis. At low prey densities, the influence coefficient of C. cyanus exceeded that of B. officinalis, and the overall influence coefficient values were negative (i.e., the presence of pollen reduced predatory mite feeding on T. turkestani). They exhibited similar values at high prey densities, and all of the influence coefficient values were close to 0 (i.e., the presence of pollen had no effect on predatory mite feeding on T. turkestani). The findings revealed that diverse plant species exert differential impacts on N. bicaudus, with some influencing its lifespan and others affecting its reproductive capabilities. Furthermore, the presence of nectar and pollen plants had a significant impact on predatory mite feeding on T. turkestani at low prey densities; however, this effect diminished as the prey density increased. Therefore, we recommend planting C. monnieri, C. cyanus, and B. officinalis in the field to ensure an ample population of predatory mites. The obtained results hold significant implications for the utilization of nectar and pollen plants in eco-friendly pest management strategies within agricultural contexts.
摘要：
bicaudus是一种掠食性螨，可用于蜘蛛螨和蓟马的生物防治。花卉资源可以为天敌提供优良的栖息地和丰富的养分。本实验的目的是评估八种花卉资源对长寿的影响，繁殖力，和比考底菌的捕食能力。在考虑的植物中，Cnidiummonnieri导致了N.bicaudus的最高寿命（24天）和繁殖力（13.8卵），而万寿菊的寿命最低（7天）和繁殖力最低（0.1卵）。通过比较三种花蜜和花粉植物对捕食性螨的捕食效果，观察到双尾奈瑟菌仍表现出对Tetranychusturkestani的II型功能反应。在花粉的存在下，双尾念珠菌的捕食功效(a/Th)表现出较低的值，与没有花粉的情况相比(对照:a/Th=24.00)。当花粉被提供时，捕食性螨的最大消费量(1/Th)高于不存在时(对照:1/Th=9.90d-1)，在存在巴草花粉的情况下获得的最高值（B.地黄:1/Th=17.86d-1)。在存在三种花蜜和花粉植物的情况下，比较了在花粉存在下，比考乌斯对T.turkestani的捕食系数：Cnidiummonnieri，紫花苜蓿,和Boragoofficinalis.在低猎物密度下，蓝根的影响系数超过了巴草，并且总体影响系数值为负值(即，花粉的存在减少了对T.turkestani的掠食性螨的摄食）。它们在高猎物密度下表现出相似的值，并且所有影响系数值都接近0(即，花粉的存在对T.turkestani的捕食性螨没有影响）。研究结果表明，不同的植物物种对N.bicaudus产生不同的影响，一些影响它的寿命，另一些影响它的生殖能力。此外，花蜜和花粉植物的存在对在低猎物密度下对T.turkestani捕食的捕食性螨有重大影响；然而，这种影响随着猎物密度的增加而减弱。因此,我们建议种植C.Monnieri,C.cyanus,和B.officinalis在野外，以确保充足的捕食螨种群。所获得的结果对于在农业背景下在生态友好的害虫管理策略中利用花蜜和花粉植物具有重要意义。
