Disease and Pest Control of Black Persimmon

Diseases

The main disease of this plant is angular leaf spot, which mainly occurs from July to August, but the incubation period of this disease is about one month. This disease can cause the leaves of the plant to fall off and the fruits to soften prematurely. In severe cases, they may even fall prematurely. In order to prevent and control this disease, we can spray the pesticide once at the end of May, the end of June and the end of July, paying attention to the back of the leaves. There are many options for medicines, such as 75% of thiophanate-methyl solution diluted 1,000 times, etc.

Pests

The first thing to talk about is the peach borer, a pest that can threaten more than 40 species of plants including persimmons, peaches, and apples. It mainly harms the fruit part of the plants. Around August and September, when the fruit is ripe, it will nibble on the fruit, causing the fruit drop rate to increase significantly. Even if they don't fall off, many of the fruits are hollowed out and lose their edible value. To eliminate this pest, focus your efforts on killing its third generation of larvae. We can choose to spray 90% of the 1,000-fold dichlorodiphenyltrichloroethane solution to kill the insects. You can also place some food that pests are interested in in the surrounding environment to lure and kill them. In addition, the overwintering places should be cleaned in time to kill the overwintering larvae.

The second type is called "persimmon caterpillar". The best time to deal with this bug is in late March to early April. We can spray a closed medicine ring at a height of about 1.2 to 1.5 meters on the trunk of the tree, with a width of about 15 to 20 centimeters. If there are a lot of pests, we can spray again after ten days.