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Metamorphosis of metasequoia: Immediately after the end of the rainy season, spray 1% of Bordeaux mixture on the canopy 4-5 times, every 10-15 days, to control the disease.
The color roller moth: The initial stage of the larvae outbreak (in the middle and early April) is the best period for prevention and treatment. 50% can be used to kill pine, 40% dimethoate, 80% dichlorvos, and pyrethroids; during the dry season (seven, August) In the event of an outbreak, the larvae (with bags) can be manually removed and burned, or the larvae can be killed by killing 1000 times of the pine.
Black-winged termites: The most effective method for controlling termites is to spray mirex-inducing ants from May to June, and also use 3% carbofuran (United States), applying l0 to l5g per plant, to prevent rainwater during application. And sun exposure, in order to maintain long-term efficacy.
Bacterial damping-off (bructural blight): The leaves should be removed and treated in time after falling leaves in autumn, and then spray 3~5Be lime sulfur mixture to the ground.