Poor cultivation practices, attacks by numerous pests and diseases, unavailability of arable land in urban areas, and the excessive and unreasonable use of fertilizers and pesticides are the constraints to celosia cultivation. Faced with all these constraints, a trial was conducted to improve celosia productivity, using a split-plot system with three blocks, at the CNRA Foods Crops Research Station in Bouaké. Six doses of compost combined with six microdoses of urea were tested. The results of the growth parameters showed that the D4T5 treatment, which was a combination of 8 t/ha of compost and 3 g of urea/package, promoted very good vegetative development at 45 days. The D2T3 and D0T5 treatments, which were respectively the combination of 4 t/ha compost + 2 g urea/packet and 0 t/ha compost + 3 g urea/packet, were the most productive with 27.28±4.50 and 27.08±2.88 t/ha respectively. The optimum compost rate was therefore obtained by treatment D2 and the optimum urea rate by treatment T3. Furthermore, of all the treatments applied, treatment D0T1, a combination of 0 t/ha compost + 0.5 g urea/packet, and treatment D0T2, a combination of 0 t/ha compost + 1 g urea/packet, obtained the best agronomic efficiencies with 14.89±12.01 and 12.89±7.75 kg MS/kg respectively. It appears that the combination of urea and compost (D2T3), which seems to produce better yields, could be recommended to farmers.

This study aimed to evaluate the efficacy of the biopesticide Prolaly on the improvement of productivity and quality of tomato (Solanum lycopersicum L.). The study was carried out in a randomized complete block design with three (03) repetitions. Treatments were carried out once a fortnight, using a sprayer, 21 days after transplanting (DAT). Vegetative growth parameters, statistically identical for all treatments at 32 DAT, were statistically different at 75 DAT. Phenological stages did not vary between treatments. The entomological data obtained revealed that the TB biological treatment was more effective in controlling whiteflies but less effective against Helicoverpa armigera. Furthermore, two diseases were observed in the experimental plot. They are a virus related to the spoon leaf curl virus (TYLCV) and a fungal disease related to collar rot. The incidences of virus disease on tomato plants were 80, 80 and 100% for TC, TB and T0 treatments respectively. Regarding fungal disease, the incidences were 20, 30 and 50% for TC, TB and T0 treatments, respectively. However, the highest healthy fruit rate (56.34%) was obtained with the TB treatment with a net yield (6.15 t/ha) statistically identical (p = 0.0230262) to that of the TC treatment (6.31 t/ha). Plant extract formulations would be an alternative in the biological management of diseases and insect pests of vegetable crops.