Eco-friendly Approaches for Mango Hopper Suppression: Mitigating Insecticide Resistance Across India’s Agro-ecological Zones
摘要
Mango hoppers (Amritodus atkinsoni Lethierry and Idioscopus spp.) cause 25–60% yield losses in India and develop resistance to chemical insecticides, making eco-friendly alternatives essential. This multi-location study evaluated botanical insecticides across seven agro-ecological zones during 2021–2022 (hopper population data; yield data pooled 2020–2022). Treatments included azadirachtin (10,000 ppm), neem soap, pongamia soap, and sequential botanical mixtures, compared with a chemical standard (imidacloprid + thiamethoxam) and untreated control. Marked regional variation was observed: northern and eastern centers (single flowering phase) required 2–3 sprays, while southern and western centers (extended flowering) required 3–5 sprays. Azadirachtin achieved 63–92% hopper suppression and the highest yields (96–130 kg tree⁻1) across most centers. Sequential botanical applications were most effective at Pantnagar (78.8% suppression) and Sangareddy (73.5% suppression). All botanical treatments maintained yields comparable to the chemical standard while preserving pollinator safety and ecological compatibility. Region-specific botanical strategies can effectively suppress hoppers and support sustainable mango production without the risks of synthetic insecticide resistance.