How to prevent and control Christmas tree pests and diseases
Under normal conditions, the average annual growth of the tree height in 10 years is more than 1 meter, and the average annual growth of the diameter is more than 1 cm. Strongly positive tree species, the canopy is phototaxis, and sufficient light is needed at the young age.
1. Anthracnose: generally occurs in June to September. In the early stage, needle-sized brown spots appeared on the stem of the seedlings, and later the diseased spots expanded and the whole plant died. Control methods: ① Burn diseased plants. ②Spray 65% senzine 600 times solution or senizium, carbendazim and other liquid medicines for prevention and treatment when the hair is in full bloom.
2. Blight: The diseased spot surrounds the base of the seedling and causes death. It can be sprayed with 1% Bordeaux liquid or 50% Diabetic 1000 times liquid.
3. Black grasshoppers, chafers, butterflies and moths, leaf beetles, pests feed on branches and leaves; black grasshoppers lay their eggs in the branches, causing the branches to die. Control methods: ①Prune the burnt and burnt black grasshopper spawning branches. ② Spray with 90% trichlorfon 800 times solution.
4. Glue disease: Glue caused by injury. Prevention and control methods: do a good job in the prevention and control of pests and diseases, and keep short piles when tending and pruning the woodland to reduce mechanical damage.
