Why do newly grown loofahs and bitter gourds give birth to maggots, and how to prevent them?

You can only fight the relevant pesticides.

In fact, this is going to involve the alien species of fruit flies, which are mainly harmful to crops, such as melon fruit flies, orange fruit flies, fruit flies, etc., which not only harm melon fruits, but also important pests of fruit trees such as lychee, dragon fruit, guava, etc.

Alien species, with almost no natural predators, are like entering a no-man's land.

The melon fruit fly, orange fruit fly and fruit fly are alien species and have almost no natural enemies in China, so they are developing so fast that many farmers have given up planting melons, citrus and other crops.

To our surprise, in some mountainous areas, there are also species such as orange fruit fly and melon fruit fly, and once these fruit flies appear, many fruits and vegetables are not spared.

Spraying is often not effective.

Many farmers report that once the orange fruit fly and melon fruit fly occur, it will happen every year, and the spraying effect of pesticides is not good, and the melon fruit fly, orange fruit fly, fruit fly, etc. are indeed difficult to be killed by insecticides, because their adult activity is very strong, and they will not stay on the fruit or leaves for a long time, and will fly away after laying eggs on the fruit, and the eggs and larvae of the fruit fly are difficult to prevent.

How to prevent it?

Spraying? You need to hit the right time, hit the right place.

It is recommended to spray the orchard floor with dichlorvos or chlorpyrifos before using adult emergences (spring), and it is recommended to spray 2-3 times, about once a week, so as to reduce the emergence of adult worms.

Pesticides can be applied at the fruiting stage, either to prevent larvae from entering the ground and pupate, or to use organophosphorus pesticides such as chlorpyrifos.

Bagging is costly.

The cost of bagging is a bit high, for some fruits, the gains outweigh the losses, and the bagging will also affect the quality and flavor of some fruits, but the control of orange flies, etc., the bagging effect is not bad.

Use a tracking attractant.

Yellow plates are used, but through our tests, the efficiency of yellow plates is not high, and the cost is not low because the suspension is relatively dense.

The main diseases in the field of loofah are downy mildew, blight, and bacterial horn spot. Downy mildew can be sprayed with Rui Poison Mold, Alum Poison, and Redomir Spray. Blight can be put in the bed of the diseased plant with lime or chlorothalonil wettable powder, and then sprayed with Ruixin.

Bacterial keratoleosis can be treated with a killable spray. Diseases are prevented by spraying pesticides before heavy rain, and the prevention and control effect is better.

The main insect pests of loofah are yellow gourd, black gourd, and melon silk borer. Yellow gourd and black gourd can be sprayed with Lesben or trichlorfon, and lime powder can be sprinkled on the foliar surface of the plant at the seedling stage. The melon silk borer can be sprayed with sharp and special and great miracles; In the larval occurrence stage, the leaf curls can be manually removed and treated intensively. After the melons and fruits are harvested, the dead vines and fallen leaves are collected and buried or burned to reduce the density of overwintering insects.

The main ones that harm crops are melon fruit flies, orange fruit flies, and fruit flies. It is indeed difficult to be killed by insecticides, because their adults are very active, and they will not stay on the fruit or leaves for a long time, and they will fly away after laying eggs on the fruit, and the eggs and larvae of the fruit fly are difficult to control.

Just after the flowers, you're the grocery bag or the red plastic bag you bought your groceries. Wrap it up. Set it up. But the strap must be a little longer. Just make sure you have a loofah bitter gourd to eat, and that's how I made it.

Wrap the loofah and bitter gourd in a bag, so that mosquitoes, butterflies, etc. cannot touch the bitterness of the loofah.

1. Seed selection and seed disinfection. Seeds should be selected from disease-free fruits to reduce seeds. Soak the seeds in 52 to 56 warm water for 25 to 30 minutes before planting to get a better sterilization effect.

2. Pay attention to the choice of ground, high ditch and deep ditch. High temperature and humidity are favorable conditions for the occurrence of anthracnose, and higher soil should be selected for cultivating bitter gourd. The ditch should be high and deep, pay attention to drainage, proper dense planting, dredging old leaves and diseased leaves, make ventilation and ventilation, change the field microclimate, and reduce field humidity.

In addition, plants should be fertilized properly so that plants can thrive and become more resistant to disease.

3. Drug control. Bitter gourd is susceptible to disease in the young fruit stage and in high temperature and rainy weather, to prevent continuous spraying, spray once for 7 to 10 days 50% carbendazim 500 times and 500 times liquid, or 75% chlorothalonil wettable powder 600 times 800 times liquid, or with 1:15:

150 Bordeaux liquid for prevention and control.

Pathogenesis] Anthracnose is a fungal disease that grows from seedling stage to late stage, especially in the hot and rainy June to September. The leaves, vines, and fruits of bitter gourd can become infected.

Symptoms] Leaf spot disease is yellowish-white, round or irregular shape, turning into brown or black dry lesions, often with concentric circle particles, easy to dry and open the lesion after the increase of leaf wilting.

The spots on the vine are long, rounded, slightly concave, pale yellowish-brown and then dark brown. If the disease continues to spread for a week, it will wither.

After the fruit is infected, it first appears on a white round concave surface, such as the size of a pinhead, then expands to a dark brown color, and finally turns dark brown and small black. The point of disease does not penetrate deep into the flesh, the center is often dehisced, and in case of humidity it secretes pink cream. Young fruits are less diseased, their pathogenicity increases with fruit growth, and ripe fruits are more susceptible to disease.

Integrated prevention and control technology.

1. Artificial prevention and control (pastoral cleaning method): remove the fallen fruit of the damaged orchard (vegetable garden) in time, and carry out centralized treatment, and the treatment method can be deep burial, water immersion, incineration, scalding, etc. to kill the larvae in the fruit.

2. Trapping and killing male insects: the use of special attractants and traps to trap and kill male adults can trap and kill a large number of male adults and reduce the number of eggs laid by male and female mating, and timely suppress the source of insects. Traps (it is recommended to use special traps produced by Ruifeng Biology) are evenly placed 5 per mu, and sexual attractants are put into each trap to trap males, and sexual attractants (Ruifeng Bio long-acting sexual attractants are recommended) are added every 20-25 days.

3. Chemical control: orchards with a large amount of adult worms can choose to spray evenly with 80% dichlorvos emulsifiable concentrate 1000 times, 90% crystal trichlorfon 800 times or cypermethrin 1500 times.

4. Fruit bagging: bagging protection is a better physical control measure, and this method is used for conditional bagging orchards, which can not only reduce various pests and diseases, but also improve fruit quality and commodity value.

The fruit fly has a tail needle on its tail, which is the ovipositor. The adult worm lays eggs and pierces the melon fruit, and the hatched larvae eat the melon pulp, causing the melon and fruit to turn yellow locally, and then the whole melon (fruit) rots and smells, resulting in a large number of falling melons (fruits), even if it does not rot, the sting wound is condensed with flow gum, deformed and sagging, the melon (fruit) skin is hard, and the melon (fruit) taste is bitter and astringent, which seriously affects the quality and yield of the melon (fruit). It harms more than 200 kinds of melons, fruits and vegetables such as star fruit, guava, citrus, green dates, loquats, yellow peels, mangoes, papayas, peaches, plums, pears, bitter gourds, loofahs, melons, melons, longans, lychees, etc.

Fruit flies, this kind of pests fly flexibly, the body shape is like a bee, so it is called "needle bee", also known as fruit borer, orange small fruit fly, orange big fruit fly, yellow fly, melon maggot, etc., the reproductive ability is very strong, and there is migration, chemical control is difficult to achieve the ideal effect. Because its eggs are laid in the skin of the hanging gourd through the tail needle, the egg masses are difficult to detect with the naked eye.

Use some systemic biopesticides.

1. Seed selection and seed disinfection. Seeds should be disease-free to reduce seeds. Before sowing, soak the seeds in 52 56 warm water for 25 to 30 minutes for better sterilization.

2. Pay attention to the selection of ground, high ditch and deep ditch. High temperature and high humidity are favorable conditions for the occurrence of anthracnose, and the soil with high terrain should be selected for the cultivation of bitter gourd. The ditch should be high and deep, pay attention to drainage, properly dense planting, and dredge old leaves and diseased leaves, so as to facilitate ventilation, change the field microclimate, and reduce the field humidity.

In addition, plants should be fertilized properly so that they can thrive and increase their resistance to disease.

3. Drug control. Bitter gourd is prone to disease in the young fruiting stage and in hot and rainy weather. To prevent continuous spraying, spray 50% carbendazim 500 times 500 times solution once, for 7 10 days, or 75% chlorothalonil wettable powder 600 times 800 times solution, or with 1:

15:150 Bordeaux liquid control.

As people's attention to health increases, more and more people are beginning to pay attention to food safety issues. As a common vegetable, bitter gourd is rich in nutritional value, but if it is not handled properly, it will lead to maggots in bitter gourd. Here are some effective ways to prevent maggots from growing in bitter gourd.

First, choose fresh bitter gourd. When choosing a branch to buy, you need to pay attention to whether there are obvious damage and flaws on the appearance, and try to choose a bitter gourd with smooth surface, bright green color and elastic shell. At the same time, the tendons and seeds of bitter gourd should be dry and crack-free.

Second, be careful when storing bitter gourd. Bitter gourd storage should generally be placed in a cool, ventilated place to avoid rotting and causing insect pests. At the same time, when storing bitter gourd, you can sprinkle some disturbing salt or white vinegar on the bitter gourd, which can prevent the hatching of parasitic eggs in the bitter gourd.

Thirdly, cooking processing is necessary. Before eating bitter gourd, you can cut open the bitter gourd to observe whether there are pests inside, and if you find insects inside, you can pick out the worms. In addition, you can also add some vinegar when processing bitter gourd, which can effectively sterilize, remove residual pesticides and reduce the possibility of maggots in bitter gourd.

In short, bitter gourd, as a nutritious vegetable, as long as we master some scientific preservation, storage and cooking methods, we can ensure that the bitter gourd we eat is healthy and safe.

Bitter gourd maggots can be used dichlorvos EC, cypermethrin, crystal trichlorfon and other drugs, just apply them according to the instructions, and the effect is more significant.

Traps can also be used to trap male insects, which can avoid breeding and mating and reduce the number of eggs. In addition, artificial prevention can also be made.

Dispose of the fallen leaves, branches, melons and fruits of the orchard during cultivation so that the larvae can be killed and avoid this situation in the later stage.

Bitter melon is one of the favorite melons of fruit flies, and it needs to be bagged and protected after pollination.

Introduction to insect pests. According to a report by the Department of Insects at the Natural History Museum in the United Kingdom, there are more than 10 million species of insects in existence, and the number is increasing at a rate of 7,000 per year, with about 90% being described. Insects are closely related to human beings, the species and number of plant-eating insects are very considerable, there are about 300 kinds of insects that can eat rice in China, and there are more than 300 kinds of cotton-eating insects.

After harvesting, agricultural products are also subject to stored grain pests in the process of storage and transportation. The economic losses caused by pests to plant damage are quite serious. The damage of insects and mites to plants is also manifested in the spread of plant diseases.

Such as aphids, planthoppers, leafhoppers, gall mites, etc. can transmit plant viruses. The loss of insects and mites is much greater than their direct harm, so the control of vector insects is one of the important measures to prevent and control many plant diseases. There are also many species of insects that are beneficial to humans, such as silkworms, bees, ash worms, etc.

Bitter melon is one of the favorite melons of fruit flies, and it needs to be bagged and protected after pollination.

@10$ No, it's really a long experience, and you have to pay attention to this in the future, I only know that there are many worms in guavas over the years, and bitter gourd also has them? Aren't these goods afraid of hardship?

My winter jujube tree has also been infested by fruit flies, how to get rid of fruit flies?

Last year, my pumpkin was the same, I don't know how to prevent it, there are too many melons in the bag.