The main period and prevention of grape pests and diseases

1, nodules: 7-8 generations a year, the first generation of eggs in early May, from the middle of May to the end of June and the beginning of September to the end of September, the two most occurred. After the arrival of the rainy season in July, the thick roots of the victims began to rot, and the locusts moved along the roots and soil gaps to the topsoil of the fibrous roots to feed on the roots, resulting in the formation of a large number of rhombic root nodules.
Prevention: In the spring and autumn, the soil within 15-20 cm of the rhizome is dug to a depth of about 10-16 cm, exposing most of the roots. Each of the plants is mixed with fine soil 1 kg of phoxim and then soiled.
2. Feathery moths: one generation per year, emergence from early June to early July, ovulation 1–2 days after adult emergence, and larvae occurring 10 days after the egg stage.
Prevention: In June and July, the victim was cut off and sprayed with 15% moth alfalfa to prevent and treat 1500 times liquid. When the harm occurred on thick stems, 50% dichlorvos could be injected in the wormhole 1000 times.
3. Tiger moths: two generations a year. In early May, the overwintering adults begin to emerge. In the middle and late June, the first generation larvae begin to injure the leaves. The first generation of adults appears from mid-July to mid-August, and to the middle of August. In the middle of the month, the second-generation larvae have been damaged.
Prevention: In the middle and late June and mid-August to mid-September, 21% of the larvae will be sprayed with chlorinated EC 3000-4000 times or 2.5% Uranus 3000 times.
4. Two-spotted leafhoppers: Three generations occur in one year, and adults in the winter overwhelm begin in early April. In the second half of June, the second generation of adults emerged. The third generation occurred between September and October.
Prevention: The first generation of nymphs is the key period of prevention and control, and it should be sprayed with 20% swop-resistance emulsifiable concentrate 2000 times for prevention and cure.
5, ten stars leaf A: One year, in late May the nymph began to harm. Adults emerged in early July.
Prevention: In late May, spray 50% dichlorvos 1000-1500 times or 21% efficiency chrysanthemum EC 2000-4000 times, spray 50% phoxim 3000 times early July to prevent and treat.
6, Red spider: more than six generations a year, after spring sprouting, in late April, overwintering females go out of larvae, harm young shoot shoots, in June a large number of damage to the leaf blade, in July a large number of damage to the ear, in October the petiole And Ye Ye.
Prevention: Field observation should be strengthened. After the occurrence of spider mites, 1.8% of kenco-emulsifiable concentrate 2000 times or 73% of chlorpheniramine 1000 times, 25% of chlorfenone WP 1000-1500 times, 20% of Liuyang 1000 times, 1000 times, 20% dying net 2000-3000 times liquid prevention, spray once every 10 to 14 days, and even spray 2-3 times.
7, Tiger Tianniu: One year, 5,6 month activities harm, with larvae larvae damage.
Prevention: Strengthen observation in the field, cut pests at any time, and inject 50% of dichlorvos 1000 times for prevention and control.
8. Curl Leaf Weevil: One year old, the adult is harmed from late May to June, gnawing the petiole.
Prevention: In the adult spawning period, spray 2.5% enemy to kill and 4000 times liquid to prevent and control, and shake off the collected dead adults and timely remove the affected leaves.
9, black pox disease: in April-May conidia, spread to the new shoots and leaves by the wind and rain on the invasion.
Control: Spray 0.5-1% sodium pentachlorophenol plus 5 degrees lime sulfur or 10% ammonium sulfate solution during the bud enlargement period to eradicate germs. Before flowering, each flower was sprayed with 1:0.7:200-240 times Bordeaux mixture or 50% chlorothalonil wettable powder 500-800 times.
10, anthrax: mostly from the middle and late June onset of disease, July-August is the invasive period.
Prevention: From the young fruit, spray once every 15 days once the special wettable powder 800-1000 times or 50% wettable chlorothalonil powder 500-800 times liquid.
11, powdery mildew: June-July is the peak period of onset.
Control: First spraying in mid-June, second spraying at the end of June, then depending on the disease condition, once every half-time spraying, the company used 50% of the special WP wettable powder 1000 times, 500-700 times the liquid Fujimi double , 30% Teflon WP 2500-3000 times liquid spray alternately.
12. Downy mildew: In the spring of January-February, oospores germinated, and they started to infect at the beginning. In spring and autumn, when there is little wind and fog, the damage is serious.
Prevention: The main drug protection, available Dasheng M-45 spray once every 10 days, and even spray 3-4 times, should be as much as possible before the rain medication. After the occurrence of the disease, 25% Rhodoxypera WP can be used 400-800 times, spray once every 7-10 days, and spray 2-3 times, which can control the hazard.
13, brown spots: late spring to early summer began to harm.
Control: 70% Dasheng M-45 800 times and 70% thiophanate-methyl, 50% carbendazim 600 times alternately spraying.
14. Virus disease: In the month after the leaf was spread, the bacteria invaded.
Prevention: In May-June spray 1:0.7:200 times Bordeaux mixture 1-2 times.

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