At the time of this pest control, how to prevent it?

The leaf miner has three high-incidence periods in a year, the most serious of which is from late August to early September. At this time, the insect population is terrible. We must do a good job of prevention in advance.

The hazard symptoms of the leaf miner are very obvious. The newly hatched larva bites the bottom of the egg shell, breaks into the epidermis, and excretes while eating. It forms a curved and curved worm. The leaves can not grow normally and curl, and when the damage is serious, all The new leaves are curled into a tube. However, because the citrus leaf miner is small and difficult to find, it can be determined after the occurrence of the harmful symptoms, and it is easy to miss the critical period of prevention and control, resulting in poor control. This hospitable leaf miner often brings along his good brother, red spider and rust tick. The leaf curl caused by the leaf miner can provide wintering and shelter for red spiders and rust tick. At present, most of the acaricides are contact-killing, and the spider mites and rust tick are hidden in the leaf, making the drug difficult to reach and the control effect is not satisfactory.

This is not enough. The leaf miner will also bring a small gift - ulcer disease. The leaf miner causes a large number of wounds on the citrus, which facilitates the invasion of the ulcer pathogen, which is often one of the causes of ulcer disease.

Canker caused by leaf miner

Leaf miner wound infection ulcer

Control method

1. Control the zero-slung tip and promote uniformity. When the shoot grows to 1 to 2 cm, the whole plant is wiped out with a new sporadic hair, once every 5 days, even several times, and the hair is lifted neatly; 2. The law of occurrence occurs, and the choice is low in adults. The peak period is unified and shoot; 3, seize the key period to spray the tip. When the autumn shoots sprout a lot and the shoots grow to about 1 cm, they should be sprayed immediately to protect the adults. At night, spray the drugs to prevent adult larvae. Spray the larvae on a sunny afternoon. 4. Pay attention to the coverage time of the medicines and make up the medicines every 5 to 7 times. Spray once a day, even spray 2~3 times, avoiding the gap period and being harmed; 5. Use pesticides with systemic drugs in the prosperous period, or use long-lasting dosage forms; 6. Recommended agents: Chlorofluorothiathiazide, chlorofluorothiabinide, carbaryl adicarbase + thiamethoxam, fenprofen + pyridinium imidacloprid, bromine cyanide thiacloprid + silicone