First of all, we have to figure out what kind of pests and diseases will happen to apples after bagging. The expert reminded the fruit growers that don’t think that the fruit trees are bagged. It’s much safer. You don’t need to fight drugs. You think that you can be wrong. Second, the apple diseases and pests after bagging mainly include: brown spot disease, black spot disease, red dot disease, apple leaf roller moth, gold thread moth, red spider, peach borer, beetle, and jaundice.
What medicine is best for controlling brown spot?
Brown spot has three forms in its early stage: one is round, the other is magnolia, and the other is mixed type. It eventually forms deciduous, or leaves with green leaves. This is its symptom.
There are three major conditions for the occurrence of: First, high temperature and humidity, and second, the orchard closed, and then another spray is not timely or improper spraying.
Pharmaceuticals for controlling brown spot: First, Polaroid + Tianda 2116. The second is Shigao or Dasheng + Tianda 2116. The above-mentioned agents blended Tianda Silicone with 6000 times better effect, and also prevent spotted defoliation.
What is the difference between black spot disease and red dot disease symptoms and etiology?
In the early stages of the development of black spot disease, acicular black spots appeared around the fruit pods, and the diameter of the black spots gradually expanded, such as large sesame seeds, some green beans, and a small white spot on the black spots. Lesions occur only on the fruit epidermis, and do not cause flesh ulcers; red dot disease mostly occurs after apple bags are picked. In the event of rain, many needle-like red spots are formed on the sunny fruit surface.
Pink trichothecene, Fusarium infecting the fruit surface to cause black spot disease; Blackfly disease caused by blackflies against black spot disease; Calcium deficiency and boron deficiency can cause black spot disease; Emulsifiable concentrates or crude oils with poor suspension rate Wait until the bag is used to cause or aggravate black spot disease. Red spot disease: Spotted deciduous bacteria infect the fruit surface causing red spot disease.
What are the best medicines for preventing black spot disease and red spot disease?
According to the above etiology to prevent black spot disease:
The first is to spray 80% of the spray grams 800 times before the apples are bagged, and 3.0% of the polyoxin 800 times.
The second is sprayed to kill Cornell mealybugs, effective pharmaceuticals include: 20% harvested WP 1500 times, 50% Baofengling WP 2000 times, and 99.1% dying insecticide 400 times.
The third is to spray 3-4 times of fruit boron calcium or bitter pox calcium 800 times calcium and boron before apple bagging, which can effectively reduce the occurrence of black spot disease.
Prevention and control of red spot disease should be taken care of before and after picking the bag to prevent and cure the disease of the deciduous leaf disease. Effective pesticides for controlling the disease are: 3.0% Polyoxin 800 times or 10% Polaroid 1000 times or 80% Penk 800 times.
The above medicaments are mixed with Tianda 2116 fruit tree special 1000 times liquid spray, alternating effect is better, and prevent sun burning disease.
How to control the damage of red spider?
In response to the occurrence of red spiders, the first is to take the time to spray the medicine and spray it twice in five days. The second one is to choose a good medicine. The medicine can be added with 2% avermectin plus net, 2% avermectin and diflubenzuron can also be used. The above-mentioned agents are blended with Tianda silicone 6000 times, which can make The liquid quickly penetrates the red spider's waxy layer, saves time, labor, and effort, and it is no longer necessary to re-spray when it rains. Both trichlorfon and oxazole can also be selected. In the end, the fight drugs must be tight, and the outer sides of the inner chamber must be uniform.
Is there a good way to deal with insect pests such as peach borer and beetle?
After bagging, peach borer has nowhere to go. To use Peach Sinophila sex attractants, most adults can be killed. In addition, insecticidal lamps can also be used to attract most moths, including chafers. , And then kill it, there are other biological measures that can prevent pollution, improve quality, for the apple pest chafer, you can hang watermelon rind on the branches and add Wan Ling powder to seduce.
Sex attractants and insecticidal lamps are two measures that we now focus on in the prevention and control of fruit tree pests and diseases. In particular, the frequency-vibration insecticidal lamp is a method for physically controlling pests. It does not produce pollution and can also reduce pollution. The number of times we use pesticides and the amount of pesticide used is an essential technical measure for the production of pollution-free fruits.
What are the characteristics of apple yellow husk? How to prevent?
The cluster of apple scutellariae clustered on the top of host shoots and sucked on the back of the leaves. The initial surface of affected leaves showed mosaic disease, and then they bent downwards, affecting growth, flowering and ornamental.
Control methods: 1 In winter or early spring before germination, spray 5% oil emulsion or 5% diesel emulsion to kill overwintering eggs. At the beginning of 24-24 months, spraying with 3% acetamiprid 2000-2500 times or 12-15 mg/L, it can also spray 20% killing chlorinated oil 2000 times, 2.5% killing EC 3000 times the liquid, 2-3 times to control its occurrence. 3 pay attention to the protection of ladybugs, grasshoppers and other natural enemies.
The above-mentioned pharmaceutical blends are up to 6,000 times more organic silicon, which saves time and labor, and eliminates the need to re-spray when it rains.
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