The small producers in Northeast of Brazil frequently use natural products for seed treatment. This practic must be encouraged social, due economic and ecological reasons. Aiming to evaluate the efficiency of some products, seeds of cowpea var. Cariri, were mixed to fragments of processed tobacco leaves, peels of tangerine fruits, black pepper - 10g of each product by kg of seeds; and soybean oil - 10ml/kg of seeds. Seeds treated with aluminium phosphine - 0.10g/kg of seeds and untreated seeds also were evaluated. The seeds were packaged into metalic recipients and montained at uncontrolled environment, in Solânea, Paraíba State, during 180 days. Previosly to storage and to each 45 days during storage, were made the determination of the moisture degree, and realizated tests for germination, vigor (first germination count and speed of germination index) and insect infestation index. A completely randomized experimental design was employed, at factorial scheme six (products) x five (storage periods), with four replicates. The seeds treated with processed tobacco leaves, peels of tangerine, black pepper and aluminium phosphine chemical showed equal efficience on the control of insect infestation and mainutence of physical and physiological quality of seeds during storage.