Where did you get so many fruit flies?

First of all, I would like to express my cordial condolences and deep condolences to the landlord for eating insects. People with bad personalities should eat less fruit, especially those who gather wisdom and strength. This is just a small lesson. Let me briefly introduce this Bactrocera dorsalis, a second-class quarantine pest in China, commonly known as golden fly, needle bee and oriental fruit fly. Flies are similar in appearance to flies, but smaller in size, golden yellow with black stripes, fast in reproduction, explosive and dangerous. Adults lay eggs in the peel, and larvae feed on the pulp, which leads to the decay and fruit drop of fruits such as annona, guava, banana, mango, papaya, carambola, citrus, honey pomelo and oil, which seriously affects the quality and yield, and is known as the "number one killer" of fruits.

In order to ensure high quality and high yield of fruits, comprehensive measures including physical control, agricultural control, sexual attraction and chemical control must be taken. 1, the evil consequences planted by human beings themselves!

2. In the process of natural evolution, different species exist for the rationality of that link in their biological chain. For example, the larvae and adults of Drosophila melanogaster eat some thin fruits at different stages of growth, and at the same time pollinate fruit trees, which are interdependent and benign evolution.

3. However, the artificial mutation of genes, the artificial breeding of seeds and the wanton use of chemical fertilizers and pesticides have artificially distorted all this. Planes and various modern means of transportation take plants and animals where they can't and shouldn't go. The result is that the natural attributes of the biological chain are artificially destroyed, making the world unnatural!

4. In the process of unnatural biological evolution, all weird situations will appear, but they are completely reasonable. Just like fruit flies, peaches, plums, apricots, oranges and apples have also mutated into ubiquitous demons for their own reproduction and immortality!

So, if one day flies, mosquitoes and cockroaches that can't be killed by pesticides appear, don't be surprised: the law of evolution is the law of the jungle, and the brave survive!

The appearance of SARS has sounded a deafening alarm to the people of China. Landlord, you stand tall and see far, and your keen observation is also a wake-up call to mankind! I. Physical prevention and control

1, fruit bagging. Bagging protection is a good physical control measure, which can not only protect the fruit quality, but also prevent the harm of Bactrocera dorsalis. The fruit can be bagged from the young fruit stage, and the mouth of the bag must be tightly tied, and the bottom of the bag should be perforated and ventilated.

2, yellow board traps. Using the habit that Bactrocera dorsalis adults like to lay eggs on yellow fruits that are about to mature, yellow stick insect can be used to trap adults.

Second, agricultural prevention and control

1, clean the orchard. Clean up the site where Bactrocera dorsalis harms, especially the orchard mixed with fruits and vegetables. The measures include: ① cleaning the fallen fruit. Remove the fallen fruit once a week at the beginning, once a day from the peak to the end, then pour the fallen fruit into the pool and soak it for more than a week, or bury it in a pit, cover it with soil for more than half a meter and tamp it. ② Foundation treatment. After cleaning the fallen fruit, spray 800- 1200 times diluted with 50-75 ml of 50% phoxim EC on the ground in time once a week for 2-3 times continuously to kill mature larvae and pupae.

2. Destroy the wintering place. In winter and spring, the larvae, pupae and pupae in the soil in winter can be reduced and killed by ploughing the orchard and its nearby soil once, or irrigating it for 2 ~ 3 times in winter, or sprinkling some quicklime powder.

3, timely harvesting. Fruits entering the harvest period can be harvested one week earlier than normal to avoid the peak of damage.

Third, sex lures males.

Using methyl eugenol as sex attractant to trap and kill male insects reduces the number of insect sources in orchards. 5 per mu in peak period, and 2 ~ 3 per mu in other months. Each trap uses 2 ml of sexual attractant on one side of the core, changes the dressing every 15 days, and adds 2 drops of malathion on the other side. The attractant cage should be hung on leafy branches, and the trap should not be exposed to direct sunlight, so as to avoid the attractant evaporating too quickly and failing. The suitable suspension height is 1.5m above the ground.

Fourth, chemical control.

The control effect of chemicals on Bactrocera dorsalis is not good, but the emerging adults and buried larvae are sensitive to organophosphorus pesticides. At different stages, 50% phoxim 800 ~ 1000 times solution or 95% trichlorfon 500 times solution plus 3% sweet and sour solution can be sprayed, and the control effect can reach more than 80%.

Fruit flies are very small, much smaller than ordinary flies.

You can find a fruit, preferably an apple, or eat it Put it in a plastic bag and leave it for a period of time (several days).

In recent years, fruits and melons in China are seriously damaged by fruit flies, and have been initially controlled by taking relevant technical measures, among which trapping male insects is a major control measure. In order to find a better attractant, in 2007, our station introduced the male and female double-killing attractant "Stable Sticking" produced in Taiwan Province Province for field test. The test results are reported as follows.

1 materials and methods

1. 1 sample

Taiwan Province Jianong Enterprise Co., Ltd. products "stable adhesion" type physical attractant for male and female pesticides; Fly attractant (sex attractant, trapping and killing male insects), product of Guangdong Insect Research Institute. The experiment was carried out in 4-year-old Yangtaoyuan, Huaize Management Area, Xia Lian Town, Chenghai District, Shantou City, Guangdong Province, covering an area of 4002 m2.

1.2 test settings

Comparative test of "stable adhesion" and flying ether effect. Set two treatments: a. Set four sticky traps every 667 m2, and spray 6 ~ 7ml sticky traps on the surface of colorless mineral water bottle (350 ml); B) Set four fly catching bottles every 667 m2, and add 2 ml fly catching bottle and 2 ml dichlorvos to each bottle. The booby trap is hung under the canopy of 1.5 m above the ground, and the distance between each bottle is10 m. During the test, the weather was fine and the temperature was 20 ~ 28℃.

2 Results and analysis

The experimental results show that the physical attractant of "stable armyworm" is better than the sexual attractant fly-lure ether. Within five days, the average number of Drosophila trapped per bottle was 107.25, which was 8.25 times that of fly trap ether. According to the ratio of male to female, stable armyworm can trap and kill male flies.