Home⇛Annals of Tropical Research⇛vol. 47 no. 1 (2025)

Performance of soybean varieties (Glycine max L.) treated with different plant extracts

Olalekan J. Olasan | Celestine U. Aguoru | Nkwam A. Ngbada | Diogo Shedrach

 

Abstract:

Production of soybean has been low among the farmers over the years despite the use of synthetic yield enhancers and chemicals that control the pests and diseases of the crop. Some improved varieties have been developed. The study evaluated the performance of three soybean varieties (Glycine max L.) treated with different plant extracts (Cymbopogon citratus DC Stapf, Hyptis suaveolens (L.) Poit and Centrosema pubescens Benth). The soybean varieties (TGX-1951-3F, TGX-2019- 2E and TGX-1987-62F) were evaluated in a randomized complete block design, in a field experiment. Data were collected on growth, yield, entomological and pathological parameters. Results showed that application of C. pubescens among other treatments improved plant performance at 40 and 60 days after planting. The treatments reduced white fly and ant pests as well as the incidence of mildew disease. Yield parameters (pod sizes, pod weight, and seed sizes) were not significantly affected by plant extracts. Observed differences in pod sizes were due to varietal effects (F=5.38, p<0.05). Combined treatments had effects on the TGX-1987-62F variety by producing the lowest number of infested seeds, thus suggesting their relevance in crop protection but subject to further trials. The best performing variety was TGX-2019-2Etreated with C. pubescens plant extract. The findings of this study may be useful in the sustainable production of soybean.



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