How to control leaf spot of Euonymus tomentosa?
Prevention and control of leaf spot of Populus tomentosa: first, thoroughly remove the diseased leaves in winter, burn them or bury them deeply, and reduce the source of the disease. Second, select strong seedlings to build Gracilaria or make yellow poplar balls. Third, spray 1% Bordeaux solution, or 50% benzoate wettable powder 1000 to 1500 times, or 50% carbendazim, or 75% chlorothalonil, once every 10 to 15 days, 2 to 3 times in a row. Or spraying with 200 times non-toxic high-fat membrane for 4 times is also effective.
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Rapid breeding technique of Populus tomentosa
Pearl boxwood has bright green leaves and small and round leaves, which can be used as hedges and individual trees in landscaping. The technology of rapid propagation of softwood cuttings is introduced as follows. 1. Cutters should be located in greenhouses or greenhouses. After the ground is leveled and thoroughly disinfected, bricks are used to form a border-shaped slotting machine with a width of 100 cm and a length of 6 to 8 m (depending on the conditions) and a depth of 30 cm. Bed bottom cushion 12 to 15 cm thick cinder, gravel or coarse sand as seepage layer, 15 to 20 cm thick fine sand as cutting substrate. Spray water on the seedling bed before cutting to make the water-holding capacity reach four.
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How to control anthracnose of Euonymus tomentosa?
The methods to control anthracnose of Euonymus tomentosa are as follows: first, collect diseased branches and leaves in autumn and winter and burn them centrally to reduce the source of the disease. Second, in the early stage of the disease, 75% chlorothalonil wettable powder 500 times, or 50% anthrax Fumi wettable powder 500 times, or 1: 1: 160 Bordeaux, or 50% carbendazim wettable powder 800 times.
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