Predation and preference of Nesidiocoris tenuis for different stages of whitefly Bemisia tabaci
The omnivorous mirid bug Nesidiocoris tenuis is one of the important predators of the whitefly Bemisia tabaci.In order to explore the predation and preference of N.tenuis for different stages of B.tabaci,non-choice and choice experiments were carried out in the laboratory.In non-choice experiments,both female and male adults of N.tenuis and the 5 th instar nymphs could feed on adults and nymphs of B.tabaci but scarcely on eggs.For both female and male adults and the 5th instar nymphs of N.tenuis,the highest predation was observed on the 1st instar nymphs,the number of whiteflies consumed were 134.2,101.3 and 88.1 respectively,followed by 2nd～3rd instar nymphs,and the numbers were 94.1,64.2 and 53.4 respectively.However,in choice experiments,male adults of N.tenuis preferred to feed on the 2nd～3rd instar nymphs of B.tabaci,followed by 1st instar nymphs,4th instar nymphs and adults.These results provided valuable information for understanding the efficacy of N.tenuis for the control of whiteflies as well as the use of combination of N.tenuis with other naturel enemies.
Nesidiocoris tenuistobacco whiteflypredation preferenceCain indexbiological control
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