Prevention and control measures of mango dew spots

Mango in the growth period will appear a dew spot disease, its disease characteristics in the fruit surface when showing "dew"-like spots, and dew in the morning gathered in the spots is extremely obvious. So how to prevent mango dew spots? Let's take a look at it together with Xiaobian.

I. Symptoms

The disease mainly occurs in fruit harvest period, and water-stained spots appear on fruit surface at the initial stage of disease, and the size of the spots is irregular. Green mold layer will appear on the spots when the field humidity is high. The disease has little effect on the fruit quality, but it will affect the appearance quality of the fruit. When it is serious, the whole fruit surface will be covered with dark brown stains, which greatly reduces the commodity value of the fruit and brings great economic losses to farmers.

II. Control methods

1. Select varieties with strong disease resistance

To combine the local climate characteristics, select varieties with strong disease resistance according to local conditions, plant disease-free seedlings, and try not to mix varieties of different climatic periods.

2. Pruning

Mango after picking only new shoots before pumping should be timely and reasonable pruning, after pruning should be coated with anti-corrosion film, promote wound healing, so as not to take advantage of germs. Pruning and pruning at the same time, pruning all over-dense branches, cross branches and diseased branches, thinning flowers and fruits at the same time, retaining appropriate fruit bearing amount of plants and enhancing orchard permeability.

3. Qingyuan

Before mango blossoms, the diseased branches and dead branches should be thoroughly cleaned and burned or buried. The miscellaneous fruits and residual flowers should be removed in time to keep the orchard clean.

4. Bagging

Bagging in time can reduce the infection probability of diseases. Bagging is generally carried out at the second physiological drop of fruits. The folding of bag mouth should be ensured to facilitate diversion, and the binding should be tight to prevent rainwater from entering the bag.

5. Strengthen fertilizer and water management

As far as possible to achieve formula fertilization, uniform tree nutrition, improve disease resistance, promote the shoot and flowering orderly, in order to unify management. One is to do a good job of orchard irrigation and drainage facilities, timely drainage in rainy season, so as to avoid accumulated water to rot roots; the second is to increase the application of organic fertilizer to promote tree health, so as to improve its stress resistance and immunity; the third is to pay attention to the application of trace fertilizer to promote fruit powdering and reduce the probability of direct contact between water droplets and pericarp.

6. Chemical control

It can be used to spray sulfur mixture or bordeaux mixture before pruning or flowering to prevent disease improvement, or spray carbendazim, chlorothalonil and other systemic fungicides at the early stage of fruit hanging for protection.

The above is the mango dew spot control measures introduced, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.