Why does flusilazole inhibit crop growth?

Flusilazole generally does not inhibit crop growth; if the concentration used is too high, it has a noticeable inhibitory effect on crop growth. It is currently a specific-effective fungicide for controlling pear scab, but crispy pear varieties are sensitive to this fungicide at the young fruit stage and should be used with caution.

I. What fungi can flusilazole kill?

Flusilazole belongs to the triazole systemic fungicides; it destroys and blocks the biosynthesis of ergosterol, causing the cell membrane to fail to form and killing the pathogen. It is effective against diseases caused by ascomycetes, basidiomycetes and deuteromycetes, and is ineffective against oomycetes. It can control scab of pear, apple, navel orange, jujube, cucumber, etc., apple ring rot fruit disease, tobacco brown spot, vegetable powdery mildew, barley leaf spot, wheat rust, powdery mildew, glume blight, and powdery mildew of chrysanthemum, mint, plantain, field bindweed, dandelion, etc. Among these, flusilazole is currently a specific-effective fungicide for controlling pear scab.

II. How does flusilazole control pear scab?

1. After the pear tree finishes flowering, when diseased buds are first seen, begin spraying 40% flusilazole emulsifiable concentrate at 8000-10000 times dilution, then according to rainfall conditions spray once every 15-20 days, for a total of 5-7 sprays, or use alternately with other fungicides.

2. Crispy pear varieties are sensitive to this fungicide at the young fruit stage and should be used with caution, otherwise it easily causes phytotoxicity. To avoid the pathogen developing resistance to flusilazole, the number of uses within one growing season should not exceed 4 times, and it should be used alternately with other protective fungicides.

3. When preparing the spray solution and applying the fungicide, wear protective clothing and trousers. Women in early pregnancy should not spray and should avoid contact with or direct exposure to the spray mist. Used empty bottles should be deeply buried or handled according to relevant regulations, and must not be discarded anywhere.