After harvesting the grapes, the main work is to protect the leaves. At this time, the most common pests and diseases are: downy mildew, black pox, brown spot, tiger beetle, and spider mites.

 

1. Downy mildew: Before the grape is harvested, the pesticide is not used for a long time. When there is more rain, it is easy to cause a large incidence of downy mildew. If more serious downy mildew appears in the harvest period, shall, after the grape harvest, 50% immediately HE Mary 2 to 3 times (imported metalaxyl + mancozeb) suspending agent, about 7 days 1 after use Bordeaux mixture, 30% higher green (mancozeb suspension), 80% Jinna Hai (thiram imported water dispersible granules) and other economic and effective protective fungicides.

 

2 , brown spot disease: If the grape grows in the middle of the rain, there will be a large number of brown spot disease bacteria breeding and accumulation, creating conditions for the later large occurrence. If the control is weak in the later stage (when there is more rain), it will cause serious damage and lead to early defoliation. Therefore, to prevent brown spot disease, first pay attention to the prevention and treatment of the medium term (before and after the sealing); secondly, use the effective agent for brown spot in the rainy season, such as 70% Lizhi (original imported thiophanate-methyl) wettable powder, 25 % Jin Lux (original imported propiconazole) emulsifiable concentrate. After harvest leaf spot occurs more serious, it should first be used once to make a 10% solid (unique original domestic import controlling grape white rot efficient fungicide - penconazole) EC 3000 to 4000 times, and then with 30 % 高生( 代森锰锌 ) suspension agent 600 times, 80% Jinnahai (original imported Fumi two-water dispersible granules) 1500 times liquid and other chemicals, and then use one copper preparation (such as Bordeaux mixture, etc.).

 

3 , black pox disease: strong breeds, such as the red earth, there are many new shoots in the fall, after the autumn grape harvest, it is prone to black pox disease. If black pox infection occurs in autumn shoots or young leaves, you can first use 10% of the emulsifiable concentrate 4000 times, or 70% of the WP 1000 times, or 25% of the Jinlix emulsifier 4000 times + 80% Jinna seawater. Dispersing granules 1500 times. The copper formulation (such as Bordeaux mixture) is then used for protection.

 

4, grape pests: beetles tiger hazardous areas, must be used in the grape harvest a strong absorption, efficient, low-residue pesticides, such as cotton, Ann Principal; leafhopper infested areas, 25% Insect Killed emulsifiable 2000 times liquid.

 

5 , other management

 

( 1 ) Do a good job in clearing the garden. After the harvest of the grapes, the branches trimmed in the garden, the dead leaves, the diseased leaves, the remaining diseased fruit, the tendrils, the damaged bagging, and the weeds in the garden should be removed. Clear out of the park and carry out a deep or burnt. In this way, it is beneficial to reduce the density of pests and diseases in the garden and reduce the incidence of pests and diseases in the next year.

 

( 2 ) Deep ploughing of loose soil. After a year of growth, the grapes are often stepped on during the growing season to make the soil more compact. It is necessary to loosen the soil in time. To improve soil permeability and promote root growth. The depth of the deep ploughed loose soil after harvesting is generally about 15 to 20 centimeters.