| Popis: |
The tomato (Solanum lycopersicum L.) is a fruit vegetable that is widely consumed in Ivory Coast. However, its production is severely limited by Blossom-end rot, one of the most constraining abiotic diseases of tomato cultivation in some production areas of the country. The present work was initiated to evaluate the effectiveness of the physio-activator "Folical", based on algae extract (Ascophyllum nodosum), which is composed of GA 14 and 202.5 g/L of calcium oxide, in the treatment of Blossom-end rot of tomatoes. To achieve this objective, a trial was carried out on soil potentially deficient in calcium and magnesium. The optimal dose of Folical for efficient reduction of Blossom-end rot incidence was determined. The efficacy of this dose was compared with that of two reference products. The doses of Folical 4 L/ha, 5 L/ha and 6 L/ha as well as the recommended doses (0.25 L/ha and 109.4 Kg/ha) and tap water (product-free controls) were applied by foliar spraying in a completely randomized Fisher block system with three replicates. The doses of Folical had significant effects on reducing the rate of attacked plants and Blossom-end rot fruits. The rates of 5 L/ha and 6 L/ha, which gave the lowest rates of attacked plants, 29.36% and 37.42% respectively, also resulted in a reduction in the incidence of Blossom-end rot fruits in treated plants, which were 4.85% and 5.47% respectively, compared to the reference products; Codamin (8.4%) and Calcium Nitrate (13.78%), and the untreated control (27.48%). The 5 L/ha dose of Folical recorded the lowest fruit growth rate of 6.42% and the average weight of the highest fruit was 94.8 g.The doses of 5 L/ha and 6 L/ha of bio activator were the most effective in the treatment of tomato Blossom-end rot. |
