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[Lifetable of cotton bollworm under different control condition]
1Laboratory Insect Ecology, South China Agricultural University, Guangzhou 510642.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|January 5, 2002
Summary
Selective pesticides and transgenic Bt cotton effectively control cotton bollworm (Helicoverpa armigera Hubner) populations. Transgenic Bt cotton inhibits pest growth without harming natural predators.
Area of Science:
- Agricultural Entomology
- Pest Management
- Ecology
Context:
- Cotton bollworm (Helicoverpa armigera Hubner) poses a significant threat to cotton production.
- Understanding natural control factors is crucial for sustainable pest management strategies.
Purpose:
- To evaluate the efficacy of different control methods on cotton bollworm populations.
- To assess the impact of these methods on natural predator populations.
Summary:
- Lifetable analysis of cotton bollworm generations under natural control, selective pesticides (IKI, Bt), chemical pesticides, and transgenic Bt cotton.
- Natural control showed moderate parasitism and predation rates.
- Selective pesticides and transgenic Bt cotton significantly reduced population trend indexes.
- Chemical pesticides reduced pest populations but also decreased predator numbers.
- Transgenic Bt cotton effectively inhibited cotton bollworm increase with no adverse effects on predators.
Impact:
- Provides data for informed decisions on cotton pest control strategies.
- Highlights the benefits of integrated pest management (IPM) approaches.
- Supports the use of transgenic Bt cotton as an environmentally friendly pest control option.