Spotted diving flies, also known as "ghost drawing symbols", mainly have American spotted diving flies, South American spotted diving flies and trilobite spotted flying flies, which occur more commonly in China.
Spotted flies often occur in cucumbers, tomatoes, peppers, cowpeas, soybeans, celery, melons, watermelons, winter melons, and other melons.
First, spotted fly hazards
Its adults and larvae can be pests, female adults fly to stab plant leaves, feed and lay eggs, larvae sneak into the leaves and petioles as pests, producing irregular snake-shaped white worm paths, chlorophyll is destroyed, photosynthesis is reduced, and leaf function is reduced or lost.
The activity of the insect body can also spread the virus, and when the plant is seriously damaged, the leaves will wither and fall off, and even the whole bead will die.
At the beginning of the occurrence, the worm road is irregularly linearly stretched, and the terminal of the worm road is often significantly widened. The badly damaged leaves dry up quickly. The mothing rate of the affected plots is 30% to 100%, the yield is reduced by 30% to 40%, and the harvest is severely cut off.
Second, why is it more and more difficult to fight
1. Adult characteristics of spotted diving flies
Adults of spotted flies fly back and forth. Today's medicine, the spotted fly in the shed died very clean, tomorrow or the day after tomorrow, the vegetables in the next shed were sold, the spotted fly in the next field flew around, and the new spotted fly in the shed would be harmed.
Today's call of spotted fly drug, the next day after the bite of the adult spotted fly, the adult will not die, or die very little, which highlights the spotted fly is particularly difficult to fight.
In addition, if there is chicken manure in the field, or there is a sweet taste of fertilization, it will also attract adult spotted fly, resulting in a situation where the adult worms are full of adults without spraying.
2. Strong reproductive ability, overlapping generations
Spotted fly has strong reproductive ability, generally occurs in the south of China, and there is no overwintering phenomenon. Short generations and strong reproductive ability.
3. The single resistance of medication is large
Due to the country's increasingly strict investigation of high toxicity and prohibited, and the drugs used for spotted flies are so many drugs, avermectin, pyridoxine, thuringiensis, high-efficiency cypermethrin, etc., the reduction of drug toxicity, coupled with the single use of drugs, causes spotted flies to easily produce resistance, and the effect is getting worse and worse.
In view of the high level of drug resistance of spotted fly, comprehensive control must be carried out.
1. Agricultural prevention and control
Clean the countryside and burn or bury the uprooted plants that are seriously damaged, the removed insect leaves and the leaves that have fallen in a concentrated manner. After harvesting, the countryside is thoroughly cleaned up to eliminate the source of insects.
2. Trap and kill adult insects
Taking advantage of the yellowing of adult insects, adult insects are trapped and killed using yellow plates that are evenly coated with sticky matter such as oil, and the yellow plates are suspended at the top of the plant.
3. Scientific drug use
In recent years, spotted flies on vegetables, melons, fruits and other crops are difficult to prevent, difficult to treat, and short effectiveness. Longshida technicians have undergone more than ten formula debugging, more than 60 tests and demonstrations in 8 provinces, and especially recommend the special agent "Latent Win" - Spotted Fly Speed Net
1. The latest compound formula, especially with imported additives, for high resistance spotted fly (ghost painting) special effect products, super touch killing and gastric toxicity, and strong systemic conductivity, good quick-activity, long effectiveness.
2. Double killing of insects and eggs, which has special effects on eggs, larvae, pupae and adult insects.
3. Strong safety, strong mixing, no resistance to continuous medication.
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