After entering the winter, after a year of growth and fruiting of the citrus tree, it is transferred to a relatively dormant state. Various diseases and insect pests that endanger the citrus, such as Tianniu, Giardinella, flower buds, ticks and resinous diseases, anthrax, etc. . In this period, the management of orange groves in winter and the timely treatment of diseases and pests to reduce the number of overwintering pests and diseases is an important measure to seize the harvest of citrus in the following year.
Clear garden in winter. Grab the winter to thoroughly clear the garden, concentrate and pile it up and burn it, or pile it up at high temperatures in a place far away from the orangery. This will eliminate many pathogens and pests that have caught winters in these places. For example, leafminers are overwintering with old insects or cockroaches at the curling edge of the victim leaf; aphids and scale insects winter over leaf or weeds with cockroaches or eggs; and larvae are on larvae or trunks Winter in the winter. Various germs often hide in diseased plants or litter. Therefore, before sprouting, it is necessary to combine the winter shears, cut pests and branches, remove dead trees, and eradicate weeds. At the same time, remove mosses and lichens on the trunk to eliminate overwintering pests and their places on the trees.
Rilled soil. Insects such as flower buds and beetles generally live in larvae in winter, and fruit flies and ulnars gnaw over winter in the soil. Therefore, during the winter, the larvae and larvae of insect pests, such as fruit flies and flower buds, can be plunged deep. Causes mechanical damage, or death due to environmental discomfort, effectively reducing the number of insect populations in the Orangery in the coming year.
White seal hole. 0.5 kg of lime, 0.5 kg of sulfur powder, 200 g of rosin, 50 g of salt, and 20-25 kg of water are used to reconcile the slurry. When dry, branches that need to be painted are brushed and then painted. If the cracks on the trunk are large, or there are tree holes in the trees, wormholes are to be used for cement, or fine river sand, or fresh cow dung, hair, lime, and yellow mud mixture plug the wormhole, 80% of the cotton wool can also be used. Dichlorvos emulsion or 40% dimethoate emulsified 5 to 10 times into the wormhole to block, and the effect of removing insects is better.
Scratch injury. For the orange tree bark tissue that has died of infection with resinous disease, the diseased area is to be scraped. The wound is sterilized with 75% alcohol, and the drug is applied. The agent contains 75% carbendazim WP 100 times, or 1% antibacterial agent 402, etc. It can also scrape off the lichens and mosses that the main stem grows, scrape off the foot rot lesions and split and dead skin of citrus trees. Apply protective agent.
Spray control. In combination with Qingyuan, 80- to 100-times fluid oil sprays are used. It is advisable to add smash killers such as smash killers, which can kill overwhelming scale insects, rust mites, red spiders and other pests, and can also control lichens. Moss and sooty. It is also possible to spray the canopy with a lime-sulfur cocktail solution of 0.6-0.8 Baume in 1 to 2 times in winter. Scale insects in the orangery are sprayed with 10 times the pine resin mixture. Note that the pine resin mixture and lime sulfur should be used more than 15 days apart to prevent phytotoxicity. Apply 5% to 10% of tea dry water or lime water. Kill the larvae of various pests that winter in the topsoil or earth seams.
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