In order to screen the current fungicides with obvious control effect on grape gray mold, the researchers of Shandong Fruit Research Institute used the mycelial growth rate method and the hanging drop method to determine the indoor poisoning of 13 fungicides against Botrytis cinerea. Force, and conducted field research experiments.
The results showed that boscalid, prochloraz, and fludioxon had the strongest inhibitory effect on spore germination, and their EC50 values ​​were 0.1204, 0.1396, and 0.1838 μg/mL, respectively; cyprodinil, boscalid, and pyridine Oxazole and fludioxonil have the strongest inhibitory effect on mycelial growth, and their EC50 values ​​are 0.2017, 0.3266, 0.4592, and 0.5585 μg/mL, respectively. Field control test results show that 50% cyprodinil water dispersible granules, 50% boscalid water dispersible granules, 50% prochloraz manganese salt wettable powder, 50% flavonoid wettable powder control effect It is best to use the bactericidal agent that is suitable for the prevention and control of grape gray mold in the range of test concentration.
By the end of 2017, cyprodinil, boscalid, and fludioxon have been approved for the control of grape gray mold in China; although prochloraz has been registered on grapes, the control targets are anthracnose and black pox. And white rot, not including gray mold.
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