Lemon is a popular type of citrus that is popular among consumers and is rich in vitamins, which is good for human health. However, lemon pests and diseases seriously affect the quality value of lemons, and timely pesticide control to reduce economic losses. The following is a detailed explanation of the specific methods to prevent pests and diseases by the China Pesticide Network Xiaobian:
Pest control: The comprehensive methods of agricultural control, biological control and chemical control are used to control the source and source of insects to the lowest level.
1. Agricultural control: increase the application of farmyard manure, enhance the resistance of the tree body, diligently remove the weeds to clean the garden, eliminate the pests and hosts, and pruning the dead branches, diseased branches and insect branches to prevent the spread of pests and diseases.
2. Biological control: Chickens, ducks and bees in the orchard have certain control effects.
3, pesticide control: to prevent the main, with the treatment as a supplement, to understand the disease, master the insect situation, look at the period, the right medicine. All major areas should be unified in spraying and pesticides should be rotated.
(1) Diseases:
Scab disease: damage to young leaves, twigs and young fruit, the lesions on the leaves are initially water-stained, and then waxy yellow wood plugs, conical protrusions, causing distortion and deformity of the leaves in severe cases; Protrusion, small disease, deformity, easy to drop fruit.
Control methods: (1) Strengthen the cultivation management, combine the winter pruning to remove the diseased leaves, and concentrate on burning. (2) New shoot spray protection, spray the young fruit when spraying 2/3, can use 50% carbendazim 1000 times solution, Dafusheng 800 ~ 1000 times liquid spray.
(2) Pests:
1, mites (red, yellow spiders, rust mites): harm the leaves, make the leaves tarnish, grayish white, causing leaves, dead ends. Yellow spiders harm the leaves in a deformed twist. Rust damage is yellowish brown or rust brown on the back of the leaf, and the damaged fruit is dark brown.
Control methods: (1) Spray once in the spring or apply the stone sulfur mixture on the main rod. (2) 73% Kloster 2000 ~ 3000 times liquid; love Hedgehog 1000 ~ 1500 times liquid spray. To control the red spider, we must first master the "control center of the main strain, supplemented by large-scale control."
2. Latent moth: The larvae sneak into the tender shoots of the young leaves and feed under the epidermis of the fruit to form a white insect tract, which makes the leaves curl and become brittle and fall off, and the fruit is easily rotted after being damaged.
Control method:
(1) Control the summer shoots and autumn shoots, remove premature, late and extra young shoots, and cut off the food chain of the leaf miner.
(2) In the summer shoots vigorously and autumn shoots, the key prevention and control measures are adopted, and there are many pesticides available for use. Alternate use can obtain good drug effects, spray tips, pesticide manufacturers recommend, and the shoot rate is up to 20 When spraying more than %, the first medicine can be used, 20% of the anti-sweeping, enemy killing, high-efficiency cypermethrin 1500 ~ 2000 times liquid.
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