Triazoles are widely used in fruit trees, such as white powder, spotted leaf disease, brown spot, and black spot disease.
Triazole bactericides have the effect of inhibiting crop growth, transform vegetative growth into reproductive growth, and these drugs are generally used in accordance with standard concentrations. If the concentration is too high, growth may be inhibited, so it is best not to use it during flowering and young fruit. If used, don't touch flowers and young fruit.
Propiconazole and fluorosiliconazole inhibited the most obvious growth, tebuconazole was intermediate, and difenoconazole and hexaconazole were relatively safe.
It is best not to use tebuconazole and hexaconazole for the first two drugs after flowering, because the poor concentration control will make the apple handle short and affect fruit enlargement. Difenoconazole is safer and can have effects on white powder black stars.
All three of the last drugs before bagging can be used, and the young fruit is then sterilized and then bagged. Propiconazole is not used as much as possible in northern orchards, and safety is poor.
Within one month after Xiehua, apples are added with at least one azole drug to control white powder, spotted deciduous leaf, brown spot and other diseases within the first three times of bagging, usually at the recommended concentration, for example, 43 % tebuconazole is generally used 5000 times or more, and 10% of phenyl ether is used 5000 times or more, which is relatively safe.
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