The Synergistic Effects of Using Plant Extracts and Salicylic Acid on Yield and Fruit Quality of Keitte Mango Trees

摘要

During 2012 and 2013 seasons, Keitte mango trees subjected to foliar application of some plant extracts namely oils of onion and garlic and extracts of green tea and turmeric each at 0.1% and / or salicylic acid at 100 ppm. The study focused on the impact of plant extract and salicylic acid treatments on growth, percentages of healthy and malformed inflorescences, length and six ratio of these inflorescences , plant pigments, N, P, and K in the leaves, fruit setting %, yield and fruit quality. Single and combined applications of onion and garlic oils as well as extracts of green tea and turmeric each at 0.1% and/ or salicylic acid at 100 ppm was very effective in stimulating growth , healthy inflorescences % , plant pigments , nutrients, fruit setting%, yield and fruit quality relatively to the control treatment. Using all plant extracts was favourable than using salicylic acid in this respect. Application of onion oil, garlic oil, green tea extract and turmeric extract, in ascending order had an announced effect on fruiting of the trees. Using each plant extract plus salicylic acid was superior than using each alone in this respect. The best results with regard to yield and fruit quality of Keitte mango trees were obtained due to spraying the trees three times with turmeric extract at 0.1% plus salicylic acid at 100 ppm.