"Eating melon masses" is originally an Internet phrase used to express a state of not caring about oneself, not expressing opinions and only watching. However, in the process of agricultural production, there is really a kind of "melon-eating masses", that is, melon flies. Melon fruit fly is an important melon and fruit pest, widely distributed in China, mainly in the southern region, is an important quarantine pest, mainly harmful to bitter melon, winter melon, pumpkin, cucumber, loofah and other melon and fruit crops, especially in the bitter melon occurs extremely seriously, once the control is improper, it is likely to lead to harvest failure.
<h1 class="pgc-h-center-line" style="text-align: center" >what harm does the melon fly cause to the melon fruit? </h1>
The main harm of the melon fly is the fruit of the crop, which is divided into two kinds of hazards, namely the adult egg laying hazard and the larval moth damage. Adult melon flies, also known as needle bees, will stab the egg layer into the epidermis of the melon fruit during the spawning period to lay eggs, and secrete a white gelatinous substance to seal the wound. The eggs will hatch into larvae, and the larvae, also called maggots, will nibble on the fruits of the melon. When the melon fruit is damaged, the injured part first turns yellow, and then it will produce deformity, and the wound will sink with glue, and the peel will become hard and can no longer be eaten. It will also be complicated by a variety of bacterial and fungal diseases, making the whole melon and fruit rot and deteriorate, smell and fall off.
<h1 class="pgc-h-center-line" style="text-align: center" how does the > melon fly happen? </h1>
Source of the melon fly: Since the melon fly is an important quarantine pest, it means that it is an invasive alien species. According to the survey, the guaracea fly first originated in India and is now mainly distributed in the southern region of China, spreading with eggs and larvae with the operation of the host. With the continuous expansion of the planting area of melons and fruits in China, the incidence of insect pests has also increased significantly, and there is a trend of aggravation year by year.
The main characteristics of insect infestation: melon fruit fly is a kind of temperature-loving pest, generally in the summer high temperature conditions activities, the reproductive speed is very fast, a lifetime can produce 300 ~ 500 eggs, in the southern region can occur 4 to 8 generations a year, generations overlap, the number of generations affected by temperature. Generally, the activity begins in April when the temperature rises, which is the first generation, the second generation occurs in May to July, and the third generation occurs in August and September, which is the most harmful to crops. In mid-to-late November, it overwinters in weeds and dead trees as adults or eggs.
The melon fly is very regular in activity, preferring to move at 9 to 11 a.m. and 5 to 7 p.m., which is both the peak of the hazard and the main spawning and mating period. On rainy days, the ability to move is reduced, and it hides in leaves and grass, even during high noon temperatures.
How to spread and spread melon flies: Melon flies have a strong ability to fly, can fly to different crops for egg laying, and after the eggs hatch and mature, they will burrow into the soil to feather adults, and then continue to lay eggs, produce generations, and then circulate and spread in turn.
<h1 class="pgc-h-center-line" style="text-align: center" > melon fruit fly occurs algebraically, the control is difficult, want to control melon fruit fly, you must do a good job in field management, to prevent the main, and combined with physical and chemical control</h1>
Do a good job of cleaning the countryside and eliminating the source of residual insects: As mentioned above, the melon fly will overwinter in mid-to-late November, and the weeds, stumps and soil of the garden are the places where the melon fly overwinters. Therefore, after the harvest of crops, the field should be thoroughly cleaned, the dead branches and weeds should be cleaned up, and the overwintering insect sources in the soil should be eliminated by watering and ploughing the soil. This will effectively reduce the incidence of insect pests in the coming year.
Bagging to protect fruits and avoid the harm of melon flies: Now not only apples, pears and other fruits have bagging technology, melon and fruit crops can also be bagged. Melon and fruit bagging can be said to be the most effective physical measure to protect the fruit from the fruit fly. Tip: The bagging time of melons and fruits is generally carried out when the melons and fruits have just flowered and the petals have shrunk.
Use adult insects to booby trap the tendency of sweet and sour: Adult melon fly have a certain tendency to sugar, vinegar and wine, so they can make sweet and sour liquid for booby traps. Preparation method: The ratio of sugar, vinegar, wine and water is: 3:4:1:2, of which 90% of the insect crystals are added to 0.5 parts. Or directly with sweet sweet potatoes, pumpkins, etc. with water to mix into a paste, and then mix the enemy insects, hanging in the melon shed or on the melon rack. One acre of land can put 15 to 20,
Use sexual booby-traps to kill adults: Make traps and use the attraction of male fly adults to trap adults to trap adults. Production method: open a few small openings of 1 to 3cm in the middle of a large plastic bottle, fill the bottle with 1/3 of the water plus an appropriate amount of permethrin pesticides, and add a sexual attractant to trap male insects (or hang a cotton cloth in the bottle, and the cotton cloth is dripped with sexual attractants and pesticides) to reduce mating and reproduction. A one-time lures are given every month, and the pesticide is dropped once every 5 to 10 days. Hang 4 to 10 traps per acre.
Hanging sticky fly board in the field: Melon fly also has a certain degree of yellowing, so you can hang a sticky fly board every 14 to 20 meters in the field, and replace the sticky fly board according to the number of sticky pests on the sticky fly board.
Find bad melons, concentrate on cleaning and destroying: If you find that there are harmful melons in the field, you must remove the melons in time and bring them out of the melon fields to kill and bury them deeply. The antiseptic agent can choose to use 50% octyl thiophos 1500 times liquid or 90% dimethods 1000 times liquid, and bury it half a meter deep underground after treatment.
Field chemical treatment: When using chemicals for prevention and control, it is generally selected to spray around 8 to 10 o'clock in the morning or 4 to 6 pm on sunny days. This time is the main activity time of the pest, and the temperature is not high, and it is not easy to produce drug damage. Commonly used agents for the control of melon flies are: 21% killing emulsion 4000 ~ 5000 times liquid, 2.5% cypermethrin 3000 times liquid, 90% enemy insect 1000 times liquid, 80% dichlorvos 1000 times liquid or 2.5% enemy killing 2000 ~ 3000 times liquid, etc., sprayed every 3 to 5 days, continuously sprayed 2 to 3 times, the agent can be used alternately to avoid the resistance of melon flies. It is also possible to water the ground of melon fields with 800 times of 50% octyl thiophos when spraying, which can kill adult insects that have just been feathered.
Summary: As a real "melon eating masses", melon flies are very harmful to melon and fruit crops, especially in the high temperature period from June to September, which is a high incidence period of pests, once the prevention and control is not timely, it will lead to a large number of melon flies, the degree of harm will rise sharply, which may lead to a harvest failure, so it is necessary to observe the prevention and control of melon fields in time. Only relying on simple chemicals for prevention and control can only cure the symptoms, can not cure the root cause, so we melon farmers usually have to do other prevention and control measures, comprehensive prevention, early prevention, fundamentally reduce the harm of melon flies to crops.