What are the control methods for pear scab?
1. Strengthen orchard management. Pear trees that grow weakly are easily infected by the pathogen. Therefore, applying more fertilizer, especially organic fertilizer, can strengthen the tree vigor and improve disease resistance. 2. Chemical control. Spray once just before the pear trees approach flowering and once when about 70% of the flowers have fallen, to protect the inflorescences, young shoots and new leaves. After that, according to rainfall conditions...
The text cut off here. The full text is as follows: The text cut off here. The full text is as follows: The text cut off here. The full text is as follows: The text cut off here. The full text is as follows: 1. Strengthen orchard management. Pear trees that grow weakly are easily infected by the pathogen. Therefore, applying more fertilizer, especially organic fertilizer, can strengthen the tree vigor and improve disease resistance.
2. Chemical control. Spray once just before the pear trees approach flowering and once when about 70% of the flowers have fallen, to protect the inflorescences, young shoots and new leaves. After that, according to rainfall conditions, spray once every 15-20 days, for a total of 4 sprays. Generally, the first spray is in mid-May (after the sepals of white pear fall and when diseased shoots first appear), the second in mid-June, the third from late June to early July, and the fourth in early August. For the chemicals, 12.5% tebuconazole or diniconazole wettable powder at 2000-2500 times dilution, or 40% Fuxing at 8000 times dilution, generally give good control.