What about persimmon worms?

Persimmon is a common fruit tree in rural areas. Basically, many farmers will plant one or two persimmon trees on their doorstep. The persimmon fruit is sweet and delicious and is loved by farmers, but some insects often grow on persimmon trees. What about persimmon worms?

1. Persimmon scale

Persimmon scale is a very serious pest that often occurs in persimmon trees. Persimmon scale is a kind of scale insect, which is very difficult to kill. Persimmon scale is a white scale shell with white sticky hair. It is a very disgusting and annoying insect. Scale insects are very difficult to destroy once they occur, and there is wax on the surface of scale insects, which is highly resistant to insecticides.

The method of prevention and control: use the fast scale to effectively spray the pest area, and then it is critical to find it in time, and then if persimmon scale appears in the fruit stage, you can choose to spray chlorpromazine for effective control.

2. Persimmon stalk worm

It is mainly harmful to the fruit, making the fruit red, soft and shedding in the early stage, which is called persimmon baking. It mainly harms the fruit with larvae, and mostly enters the fruit from the stalk of persimmon. There are feces in the wormhole and wound with silk, the young fruit dries up in the early stage after being eaten, and the big fruit turns yellow, soft and shedding in the early stage, resulting in a reduction in yield. The insect has two generations a year in the Yangtze River valley, overwintering as mature larvae in the thick skin gaps of the branches. In summer, eggs are laid between the stalk and the pedicel, and are eaten into the fruit by the base of the pedicel. The larvae have the habit of turning to fruit.

Control methods: ① winter or early spring scraping bark to eliminate overwintering adults. ② picked the dried persimmon stalks from the trees in late autumn to eliminate the larvae in the persimmon stalks. The insect fruit, dried persimmon or yellow-faced persimmon were removed in time from June to August by ③, and the larvae or pupae were eliminated. ④ drug prevention and treatment. In the peak period of adult occurrence and spawning of the first and second generations in mid-July and mid-August, 1500-2000 times of 50000IU/ mg of Bacillus thuringiensis wettable powder was sprayed every 10 to 15 days.