Age-dependent mutual interference of Neoseiulus californicus (Acari: Phytoseiidae) on two-spotted spider mite.

IF 1.8 2区 农林科学 Q2 ENTOMOLOGY
Mahsa Nouri-Miri, Katayoon Kheradmand, Yaghoub Fathipour
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Abstract

Neoseiulus californicus (McGregor) is one of the main predators belonging to the family Phytoseiidae classified as a type II generalist predator that has been used to control greenhouse pests such as thrips, eriophyids, and spider mites. One of the significant ways to recognize the efficacy of the phytoseiid predatory mites is the study of their foraging behavior. Mutual interference is a negative relationship between a predator's searching efficiency and its density. This study appraised the effect of the age-dependent mutual interference of N. californicus on larvae and nymphs of Tetranychus urticae Koch under laboratory conditions at 25 ± 1℃, 70 ± 5% RH and a photoperiod of 16 L: 8D h. To determine the per capita searching efficiency and interference coefficient, Nicholson's model and linear regression were used, respectively. The results showed that the total predation of N. californicus reared on T. urticae nymphs was significantly affected by predator density and age. In addition, per capita searching efficiency of the predator significantly declined with predator density, which is the result of mutual interference. Furthermore, the slope of the linear regression (m) between the logarithm of per capita searching efficiency and the logarithm of the predator density increased, ranging from - 0.465 in 5-day-old individuals to -0.1452 in 40-day-old individuals. The negative effects of mutual interference decreased along with growing age. Our findings showed that in different tested ages, the rate of interference among adults differed compared to immature individuals. These results suggest that age-specific differences in mutual interference should be considered when optimizing the mass rearing and field release of predators for the biological control of T. urticae.

加利福尼亚新绥螨(蜱螨亚纲:植物绥螨科)对双斑蜘蛛螨的年龄依赖性相互干扰。
加州新绥螨(neseiulus californicus, McGregor)是植物绥螨科(Phytoseiidae)的主要捕食者之一,被分类为II型多能捕食者,被用来防治温室害虫如蓟马、角虫和蜘蛛螨。研究植物类掠食性螨的觅食行为是认识植物类掠食性螨药效的重要途径之一。相互干扰是捕食者的搜索效率与密度之间的负相关关系。本研究在25±1℃、70±5% RH、16 L: 8D h的光照条件下,评价了加州新螨年龄依赖性相互干扰对叶螨幼虫和蛹的影响,分别采用Nicholson模型和线性回归来确定人均搜索效率和干扰系数。结果表明:捕食者密度和年龄显著影响加州小蠊对荨麻疹若虫的总捕食量;此外,捕食者的人均搜索效率随着捕食者密度的增加而显著下降,这是相互干扰的结果。此外,人均搜索效率的对数与捕食者密度的对数之间的线性回归斜率(m)增大,从5日龄个体的- 0.465到40日龄个体的-0.1452。随着年龄的增长,相互干扰的负面影响逐渐减弱。我们的研究结果表明,在不同的测试年龄,成年人的干扰率与不成熟的个体相比有所不同。这些结果表明,在优化大规模饲养和野外放生对荨麻疹的生物防治时,应考虑相互干扰的年龄差异。
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来源期刊
CiteScore
3.90
自引率
9.10%
发文量
81
审稿时长
4-8 weeks
期刊介绍: Experimental and Applied Acarology publishes peer-reviewed original papers describing advances in basic and applied research on mites and ticks. Coverage encompasses all Acari, including those of environmental, agricultural, medical and veterinary importance, and all the ways in which they interact with other organisms (plants, arthropods and other animals). The subject matter draws upon a wide variety of disciplines, including evolutionary biology, ecology, epidemiology, physiology, biochemistry, toxicology, immunology, genetics, molecular biology and pest management sciences.
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