Studies on the Damage and Control of Mango Seed Weevil, Sternochetus mangiferae (Fab.) in Some Major Mango Producing Areas of Northern Adamawa State, Nigeria

Abstract

A study was conducted on the damage and control of mango seed weevil (Sternochetus mangiferae), an emerging pest in major mango-producing areas of Northern Adamawa State, Nigeria. It focused on four Local Government Areas, grouped into Michika/Madagali and Mubi/Maiha, to assess the pest's impact and control measures. Using a Randomized Complete Block Design with five treatments replicated three times, data were collected on damaged mango flowers, fruits, and seeds. Results showed significant differences among treatments. The highest damage to flowers (7.00; 9.33) and fruits (4.33; 6.00) occurred in untreated trees in Michika/Madagali and Mubi/Maiha, respectively. Trees treated with synthetic insecticides and moringa seed oil had the least damage to flowers (0.33; 1.33) and fruits (0.67; 1.67). These treatments also yielded the highest mean of undamaged fruits (15.00; 13.67) and seeds (14.33; 13.00) in both areas. The study confirmed the mango seed weevil’s potential for significant economic damage in the region. Botanical aqueous lures (Prolure and Pklure) proved effective as weevil attractants when hung on trees. Recommendations include the minimal use of synthetic insecticides combined with moringa seed oil, along with plant-based attractants and traps, to ensure sustainable and environmentally friendly pest management. These methods offer biodegradable, ecologically safe, and effective solutions for managing weevils in mango plantations.