Do not use pesticides after the grape harvest
Error point after grape harvest, pest control overlooked or not considered necessary.
After the cause of grape harvest, grape leaves must ensure that the majority of health, so as to ensure the grapes fully mature branches, and vines and roots need to accumulate nutrients, these need to have enough healthy leaves; pest control after the grape harvest, will Reducing the overwintering base number of pests and diseases lays the foundation for the prevention and control of pests and diseases in the second year and is an important period for prevention and control. If the defoliation caused by disease epidemics after grape harvesting will not only affect the second year's grape production (yield and quality), it may take several years to recover.
The right approach General vineyards must use pesticides, and adjust the measures according to the specific circumstances.
Longer-growing varieties (late-maturing varieties) immediately after defoliation were harvested and no measures were taken.
There is no time for measures to be taken after the late-maturing variety has been harvested at the wrong point. The reasons for the first two months of deciduous growth are the rapid growth period of the grape root system. The growth of grape roots during this period is not only the basis for preventing freezing damage, but also the conditions for the healthy growth of grapes in the second year. After harvesting, it is an important period to reduce overwintering bacterium source and insect source. Measures should be taken according to the specific conditions of the orchard.
Correct practice 1 Reduced yield (reasonable load): At the late growth stage of the grape, especially at maturity, the leaves have enough nutrients to not only ensure the normal ripening of the grapes, but also have enough nutrients for mature shoots, flower bud differentiation, and root systems. Growth, accumulation of root nutrition, etc. 2 According to the climate, pests and diseases, when the grapes begin to mature, take corresponding control measures to ensure the safety of the later leaves. 3 Immediately after harvesting the grapes, use a copper preparation (such as 1:0.7:100 Bordeaux mixture) to protect the leaves and use it as a measure to reduce the number of pathogenic bacteria in winter.
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