The major fungal onion deseases and their control in Uzbekistan
Authors: Avazov S.
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In this article presents disease of smut in onion plants. Two types of fungi were identified: Urocystis allii Schellenb. and U. cepulae Frost. and the signs of their manifestation are given.
Proceeding from the biology of the pathogens, the inoculants of onion’s were used as control measures: Bahor 60% (1,0 and 2,0 kg/t according to the recommended flow rates), Pergado F (0,4 and 0,5 l/t), Vitavax 200 75% of the f. p. (3,0 and 4,0 kg/t) and Topsin–M 70% of the f. p. (1,0–1,5 kg/t) and Fundazol 50% of the f. p. (2,0 kg/t).
On the 10 th day after spray of fungiciedes, the biological efficiency indicators showed: Vitavax 22,75% f. p. in the rate of flow of 4.0 kg/t — 92,3%, then goes Fundazol 50% of the f. p. (2.0 kg/t) — 90.8%, Topsin–M 70% of the f. p. (1,5 kg/t) — 90,7%, Pergado F (0,5 l/t) — 90,1% and Bahor 60% of the f. p. (2,0 kg/t) — 90,0%.