Yellowing of leaves has three main causes: iron deficiency, nematodes and root rot. The source lists chemical treatments for bud worm, blossom midge, red spider mite, nematodes, root rot and Alternaria leaf spot. It also lists Pseudomonas fluorescens: 25 g/m² to the soil and a 5 g/l foliar spray monthly after planting. Choose any chemical only with your local Horticulture or Agriculture Officer.
Follow the instructions on the product label. Consult your local Agriculture Officer before use.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Malligai – Plant protection, pp. 250–251
