Introduction to the little sister of the dish
Do you often see the curved Dao on some leaves, and it looks like that kind of "ghost drawing symbol", with a little artistic atmosphere! Take a closer look, and you'll be sad to die!
It turns out that there is a pest hidden in the Road, it only cares to eat and eat, and slowly your vegetable leaves will become full of devastation, which will not only affect the appearance, but also affect the growth of the plant! What the hell are these "ghost charms", and today we must curb their arrogance!
"Ghost Drawing" is our popular name for this pest, and it is actually a spotted fly, also called a leaf diver fly!
A brief introduction to the real body of the "Ghost Painter"
1. Real identity
American spotted fly, South American spotted fly, clover spotted fly, etc. (anyway, in the eyes of vegetable farmers are leafminer flies, these 3 species were previously introduced to China from abroad, and then spread to many provinces in the mainland)!
(Enlarged appearance of an adult zebra fly)
2. Harmful vegetable types
Tomatoes, cucumbers and other melons, cowpeas and other beans, green vegetables, etc.
(Spotted fly endangers melon leaves)
(Spotted fly endangers vegetable leaves)
(Spotted fly harms onions)
(Spotted fly harms tomatoes)
(Spotted fly endangers legumes)
(Spotted fly endangers melons)
3. Means of harm
Adults puncture the leaves, suck up the sap, and lay eggs under the epidermis, causing the leaves to yellow.
(The hazard of the spotted fly adult, image source: Huitu Network)
The larvae feed inside the underlying leaves, forming curved, irregular white worm lanes.
(Where the circle is red are the larvae of the spotted fly))
4. Seriousness of the hazard
1) The harm is great.
In particular, cucumbers, loofahs, cowpeas, tomatoes and other victims are the most serious, generally reducing production by about 25%, and serious production can be reduced by 80%, or even harvest.
2) Hidden hazards, strong reproductive ability.
Often crops receive serious harm before they think about prevention and control.
3) Serious drug resistance.
Resistance to pesticides is fast, and the difference between the north and the south is large, resulting in incomplete prevention and control.
Event Promotion
<h1>Prevention and control analysis</h1>
1. Do the most important preventive measures
⏩ At the peak of pest occurrence, remove the leaves with insects in time and incinerate them; (Don't pick them and just throw them outside the field, the larvae in the leaves can still pupate, and finally feathering becomes a source of harm!) ）
⏩ After the vegetables are harvested, the dead branches and leaves are burned in time, and the soil should be turned deep to less than 20 cm to reduce the feathering rate of pupae.
2. Use the armyworm plate to trap adult insects
⏩ The adult insects of the spotted fly are yellowish, and the field can be hung with yellow roll-type armyworm plates, generally hanging 20 to 30 cm above the top of the plant.
⏩ If cowpea, beans, cucumbers and other upright climbing crops, hang 1/2 to 2/3 of the ground. Generally, 30 to 40 pieces are hung per acre, and the specific number depends on the degree of occurrence of insects.
3. Parasitic bee control (suitable for organic farms)
⏩ Organic farms or conditions can use parasitic wasps for control.
⏩ As a natural enemy of spotted fly larvae, parasitic wasps can reach more than 50% without medication.
⏩ Parasitic wasps with better parasitic rates include Chick bees and submarine cocoon bees.
(Some kind of parasitic wasp of leafminer fly)
(Another parasitic wasp of leafminer flies)
(Parasitic wasps looking for spotted fly larvae)
4. Pay attention to medication skills and use the right medicine
Key timing
⏩ When the larvae are 1 to 2 years old, it is the most critical period for the moth, and the worm passage at this time is about 1 to 3 cm.
(As shown in the picture, the small worm road with a red circle)
Principles of spraying
⏩ When spraying, remember to be "comprehensive and thoughtful, the front of the leaf and the back of the leaf must be taken into account, and the plant should also be sprayed on the surface"
Choose the right medicine
⏩ Optional blends containing avermectin, high-efficiency cypermethrin, fly-killing amine, methylphenidate and other blends are available for use during the critical period of control.
Big Harvest Vegetable Little Sister Note:
The control of spotted fly pays attention to unified prevention and control, the same kind of pesticide should not be used repeatedly, pay attention to the alternating use of pesticides, continuous prevention and control, generally sprayed once every 7 to 10 days.
(Big Harvest Vegetable Little Sister Note: The above content is part of the source network, for reference only!) If you have better suggestions, or different insights, you are welcome to share them! ）