Transgenerational stability of a high temperature-adapted strain of Neoseiulus barkeri Hughes (Acari: Phytoseiidae) and differential expression of antioxidant genes in response to heat stress

作者：Wenqiang Chu, Dong Xiang, Haoyue Tan, Mian Wang, Huanhuan Zhang, Hanqiu Chen, Yaying Li, Huai Liu · 发表于：Biological Control · 年份：2024 · DOI：10.1016/j.biocontrol.2024.105617 · 被引用次数：2 · 研究领域：Insect-Plant Interactions and Control、Insect and Pesticide Research、Insect Pest Control Strategies

• HTAS of N. barkeri exhibits stability of thermal tolerance. • Predation ability of HATS offspring without selective pressure is superior to CS. • Antioxidant strategies of HATS offspring exhibits significant changes. • Activity of antioxidant enzymes exhibit correlations with gene expression levels. • HTAS can be a crucial biological control agent in hot weather. High temperature-adapted natural enemies may exhibit improved biocontrol effiicacy in hot weather, but transgenerational stability of the trait may affect practical applications. Neoseiulus barkeri is a commercially produced biocontrol agent, and a high temperature-adapted strain (HTAS) has been developed. Thermotolerance and the activity of antioxidant enzymes were evaluated in HTAS progeny under non-selective conditions to determine transgenerational stability of the selected adaptation. Results showed that survival of HTAS offspring decreased slightly after heat stress compared to HTAS parents, but remained significantly higher than that of the conventional strain (CS). LT 50 and LT 95 values of HTAS progeny were similar to HTAS parents and were approximately 2.5 and 4 h greater than CS, respectively. Similarly, predation behavior of HTAS offspring decreased somewhat compared to HTAS parents after short-term heat stress, but remained significantly higher than that of CS mites. Searching rate ( a ) of HTAS progeny was similar to HTAS parents and noticeably higher than CS, whereas handling time ( T h ) was lower t...