Control of scab in pear trees
1. Strengthen the management of orchards. The growth of pear trees is weak and is easy to be infected by bacteria. Therefore, the application of fertilizer, especially organic fertilizer, can enhance the tree potential and improve the disease resistance. two。 Chemical control. About 70% of pear trees should be sprayed before flowering and about 70% of falling flowers to protect inflorescences, shoots and new leaves. After that, according to the rainfall, the spray was sprayed every 15 to 20 days, for a total of 4 times. Generally, the first spray was in mid-May (after the pear sepals fell off, the diseased shoot first appeared), the second time was in mid-June, the third time was from late June to early July, and the fourth time was in early August. Generally, 12.5% terprazole or diniconazole wettable powder 2000-2500 times liquid and 40% Fuxing 8000 times solution have better control effect.
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How to control pear scab
At the beginning of fruit infection, pale yellow spots were produced, and the spots were slightly depressed after expansion, with black mold. Later, the spots became cork and cracked. Its control measures: pear scab damage fruit early, spraying chemicals are 1:2:200 Bordeaux mixture;70% methyl topril WP 800~1000 times solution;50% carbendazim WP...
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Improved trunk shape and simplified pruning of pear trees
The pear tree is an improved trunk with a height of 60-70 cm and a height of 3.5 m. There are 4-5 large main branches in the middle and lower part of the central leader's trunk. The distance between the main branches is about 20 cm. The base angle of the main branch is 60 degrees. The waist angle is 30-50 degrees. The tip angle is erect; the main branch extends uniaxially. It bears small and medium-sized fruiting branches or groups of branches; the ratio of main branches to trunk is controlled.
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