Eriogyna pyretorum (Lepidoptera, Saturniidae) parasitoid species investigated in Fujian, China

Abstract

Eriogyna pyretorum Westwood is a notorious defoliator of Camphora officinarum Nees that causes large economic and ecological losses in planted forests. To understand the importance of suppressing the population of E. pyretorum on natural parasitoids, a four-years investigation was conducted in the field. Four egg parasitoid species Ooencyrtus kuvanae Howard, Trichogramma chionis Ishii, Telenomus sp. and Anastatus dexingensis Sheng & Wang were captured in the wild. One of these is the dominant endoparasitoid species T. chionis, which has a quicker developmental time (8.33 d), more offspring (8.39/egg) and a greater parasitism rate (89.54%). With different elevation distributions, the parasitism rates for Kriechbaumerella longiscutellaris Qian & He, Gregopimpla himalayensis (Cameron), Theronia depressa (Gupta) and Xanthopimpla konowi (Krieger) were 17.29%, 2.10%, 4.23% and 0.83%, respectively. Female longevity (47.75 d), offspring (13.36/pupa) and sex ratio (1.16:1) were compared in four pupal parasitoids and K. longiscutellaris was the most abundant species of E. pyretorum in Fujian Province.

Response of growth and physiological enzyme activities in Eriogyna pyretorum to various host plants

“…Eriogyna pyretorum (Westwood) (Lepidoptera: Saturniidae) is widely distributed in Myanmar, China, India, Malaysia, and Vietnam, and is notorious for its defoliating behavior ( Lin et al, 2023 ). E. pyretorum exhibits distinct characteristics such as a short outbreak cycle, high feeding capacity, and prolific egg-laying, directly impacting the growth of ornamental and economically significant tree species, resulting in considerable economic losses and ecological damage ( Zhou et al, 2021 ).…”