Poor growth of grapes when resisting axial blight
In the process of grape growing, it is often jeopardized by Axial Blight. When we went to the countryside to carry out technical services recently, we saw that some farmers’ grapes had been infested by Axis blight. Axle blight, also known as house blight or grain blight, may occur in ordinary vineyards. There are fewer diseases in plastic sheds or shade nets or bags, and more open-field cultivation occurs.
Axle blight mainly damages the stem, cobs, and fruit granules, and also damages the leaves in severe cases. The occurrence and spread of axis blight is mainly caused by wintering of conidial or ascostic shells on diseased fruits and diseased leaves, and conidiospore and coccenospore are transmitted through wind and rain during the warmer months of May and June. Temperatures around 25°C The most appropriate disease. In early July of this year, it was during the coloring of some fruits that they suffered from high temperatures and high humidity, which contributed to the occurrence of the disease. The more severe the diseases were in the near maturity, the more severe the tree vigor, the higher the density, and the worse the drainage was in the worst vineyards. .
In order to reduce the damage caused by Axial Blight on grapes, it is necessary to start with prevention, control the spread, and conduct comprehensive prevention and treatment as soon as possible.
From the perspective of agricultural control, the first is when grapes enter the fruiting period, and for the vigorously growing plant groups, excessive branches and leaves must be cut off, and 0.2%~0.3% of potassium dihydrogen phosphate and 0.01% of sudan boron should be sprayed to enhance the tree. Potential, improve disease resistance; Second, when the initial stage of disease, it should immediately remove the disease, disease ear, reduce bacteria carrier, prevent disease-free ear re-invasion; the third is the combination of pruning in late autumn to remove diseased leaves, disease ear, clear the floor The diseased tissue was brought to the park and burned or buried deep to reduce the number of pathogenic bacteria.
From the perspective of chemical control, in the fruit and fruit expansion period, one can spray 80% mancozeb WP to 600 to 1000 times; 2 can spray 75% chlorothalonil wettable powder 600 to 800 times the liquid 3 can be sprayed with 70% thiophanate-methyl WP 800 to 1000 times; three can be sprayed with treprolasic mold 800 to 1000 times or 800 grams of Ruixin Mn 800 to 1000 times. For the old vineyards, which are often susceptible to disease, the Baume 3 to 5 degrees lime sulfur and 200 times the half Bordeaux mixture are sprayed every year during the grape growing season.
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