Effects of Transgenic Cry1Ab+Vip3Aa Insect-resistant Maize on Non-target Arthropod

doi:10.16409/j.cnki.2095-039x.2026.01.005

Abstract

Abstract: Genetically modified (GM) insect-resistant crops can effectively control target pests and reduce crop yield loss. However, their impact on non-target pests diversity and dynamics of field populations have been a concern. In the period between 2023 and 2024, we dynamically investigated occurrence patterns and population dynamics of non-target organisms including non-target pests and natural enemies in three treatment fields: those planted with GM maize XianDa 901ZL (incorporating Cry1Ab+Vip3Aa+epsps), non-GM maize XianDa 901 used as a control, and non-GM maize XianDa 901 treated with chlorantraniliprole for pest management. Additionally, the species richness and abundance were analyzed. The results showed that the predominant non-target organisms in the maize fields comprised 2 classes, 6 orders, 12 families, and a total of 17 species. Among these, Aphididae constituted the largest proportion, followed by Coccinelloidae and Chrysomelidae. Aphids were identified as the primary pest, with ladybugs serving as the main natural enemy insects. There were no significant differences in the community species richness (S), Shannon-Wiener diversity index (H'), Simpson dominance index (D), and species evenness index (J) of non-target organisms between GM and non-GM control maize fields. However, in 2024, maize fields treated with chlorantraniliprole exhibited an increased dominance index and a reduced diversity index compared to both GM and non-GM maize fields. There were no significant differences in the numbers of non-target pests and natural enemies between GM and non-GM fields, suggesting that the composition of non-target biological communities in these fields was comparable. In contrast, the chlorantraniliprole-treated fields showed a significantly higher population of non-target pests compared with GM and non-GM fields during the milk-ripening stage in 2023 and the tasseling stage in 2024. However, the total population size of natural enemies in chlorantraniliprole-treated fields was significantly lower than in GM and non-GM fields in 2024. Therefore, compared to non-GM maize, the cultivation of XianDa 901ZL does not exhibit a significant impact on the field community of non-target organisms. In contrast, the application of chemical pesticides has a more pronounced effect on the diversity and population dynamics of non-target organisms. The findings of this study provide substantial data to support the broader application and promotion of GM insect-resistant maize.

Key words: genetically modified insect-resistant maize, non-target pests, community structure, ecological indices, population dynamics

CLC Number:

S476

CHEN Yanlu, YANG Xianming, WANG Wei, Lü Mingyuan, WANG Wenhui, YUAN Haibin, LIANG Gemei. Effects of Transgenic Cry1Ab+Vip3Aa Insect-resistant Maize on Non-target Arthropod[J]. Chinese Journal of Biological Control, 2026, 42(2): 403-411.

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