The Effect of Different Ecological Factors on Trichogramma pintoi (Voegelé) Parasitizing Eggs of Tomato Leafminer, Phthorimaea absoluta (Meyrick)

doi:10.16409/j.cnki.2095-039x.2023.01.011

Abstract

Abstract: Trichogramma pintoi is an egg-parasitic natural enemy of Lepidopteran pests. Clearify its ability to parastic eggs of Phthorimaea absoluta provides a sight for controling P. absoluta by T. pintoi in field. In this paper, by setting different levels of egg density of T. absoluta, temperature, humidity, presence or absence of light and the days after egg laid, the main factors that affect T. pintoi parasitizing P. absoluta eggs are evaluated. At the parasitic egg density of 30 eggs/tube, 26 ℃, 75% relative humidity, and darkness environment, the parasitic rate is the highest and reach to 93.33%. The longer the duration of egg laid by P. absoluta is, the weaker the ability of T. pintoi to parasitize it. According to the model fitting test, the parasitism of T. pintoi on P. absoluta eggs is consistent with the disc equation of Holling-Ⅱ functional response, indicating that T. pintoi is one of the potential parasitoids to control P. absoluta.

Key words: Trichogramma pintoi, Phthorimaea absoluta, egg-parasitoid, evaluation of parasitic ability

CLC Number:

S476.3

FU Kaiyun, LI Aimei, DING Xinhua, JIA Zunzun, AHMAT·Tuerxun, ROUZI·Arzigul, FENG Hongzu, LI Xiaowei, GUO Wenchao. The Effect of Different Ecological Factors on Trichogramma pintoi (Voegelé) Parasitizing Eggs of Tomato Leafminer, Phthorimaea absoluta (Meyrick)[J]. Chinese Journal of Biological Control, 2023, 39(3): 507-513.

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