How to prevent pear black spot
Occurrence
It usually begins in late April and young leaves are vulnerable. In case of rain in autumn, it is more popular. Poor terrain, partial application of chemical fertilizers or insufficient fertilizer, unreasonable pruning, debilitating tree vigor, and harmful factors such as pear net larvae and aphid mites can aggravate the epidemic hazards of the disease.
Control methods
Strengthen orchard cultivation and management Rational fertilization, reuse of basal fertilizer, multi-application of high quality organic fertilizer, increase of phosphorus and potassium fertilizers, timely addition of trace element fertilizers, increase tree vigor, and increase disease resistance. The trees are properly loaded; the orchards are drained in time during the rainy season.
Remove the winter fungus during winter pruning to cut off diseased branches, and clear the leaves in the park, fruit drop, bring out the orchard together burned and buried deep.
Chemicals prevention and control implement the principle of "prevention as the main, comprehensive prevention and control" and reasonably select pharmaceuticals. After the winter cut, spray the Bami 3 to 5 degree lime sulfur solution to clear the garden. During the growing period: 50% available acetaminophen wettable powder 1000 to 1500 times, 75% chlorothalonil wettable powder 1000 times, 50% carbendazim wettable powder 800 to 1000 times, 70% methyltoluene Bujin WP can be used alternately with agents ranging from 1000 to 1500 times.
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