亚洲最大福利网站_4hu四虎永久网址_麻豆国产原创_国产成人av一区二区

Fungal ‘rust’ spreads in Indian apple orchards after continuous rain
date:Jun 25, 2019
lot of active chemical ingredients accumulating on fruits, which causes rusting.

Chemical rusting can develop either on the stem end when the calyx end bends downwards, or on the calyx end when it stands upright. Some chemicals like Tebuconazole, Sulphur, and copper oxychloride when sprayed at early stage of fruit development (usually before June 15) not only cause rusting but also prove to be phytotoxic to apple leaves.

To contain rust diseases, scientists at the KVK recommend deep pruning of

12/23 08:57