Role of the Kogle-zanga biopesticide in improving amaranth leaf production in Loumbila

Abstract

Amaranth is a widely consumed traditional vegetable with high nutritional value. However, its production is constrained by both biotic and abiotic factors, which cause significant field damage. To address this issue, farmers often rely on a variety of pesticides, many of which are unregistered and pose risks to both humans and the environment. Hence, there is an urgent need to find alternatives to these synthetic products. In this context, the present study was undertaken to improve amaranth production using Kogle-zanga, a biopesticide. A completely randomized block design with four replications and four treatments was used. The biopesticide’s efficacy was assessed based on pest attack levels, plant growth and development, and leaf yield. The results showed that Kogle-zanga effectively controlled pests. The T3 dose (70 mL/ha) had a more favorable effect on growth, development, and leaf yield compared to the T1 (50 mL/ha) and T2 (60 mL/ha) doses. Among the tested doses, T3 (70 mL/ha) was the most effective. Additionally, the biopesticide enabled amaranth to achieve its potential yield of 1–2 t/ha. Therefore, promoting the use of this biopesticide among producers for amaranth leaf cultivation is essential to protect human health and the environment.