The use of insect nets can not only control the spread of various pests and prevent the harm of virus disease transmission, but also create a suitable small environment for crop growth, greatly reducing the use of chemical pesticides in vegetable fields, and providing a basic guarantee for the production of high-quality agricultural products.
But sometimes even if the insect net is covered, the effect is minimal. What is the reason for this? Below is a brief explanation for everyone, hoping to be helpful to friends who cover insect nets.
1. Inadequate coverage
In vegetable production, some farmers do not pay attention to maintaining and inspecting the tightness of the insect prevention net, causing some pests to take advantage of the situation and bring harm to the vegetables.
Improvement measures: The insect proof net should be directly covered on the greenhouse frame, tightly compacted with soil or bricks around, and the roof pressure line should be tightened to prevent strong winds from lifting. At the same time, it is necessary to regularly inspect the insect proof net for any tears or cracks. Once found, it should be repaired in a timely manner to ensure that there is no invasion of pests inside the net. Pay attention to closing the door casually when entering and exiting to prevent butterfly moths from flying into the shed and laying eggs. At the same time, avoid vegetable leaves tightly attached to insect nets, and prevent pests such as yellow striped fleas from feeding on the leaves and laying their eggs on them outside the net, which can breed pests in the shed.
2. Neglecting full growth period coverage
Some vegetable farmers only start covering insect nets in spring after the climate warms up, believing that it is not necessary to cover insect nets when pests are not visible during low temperature seasons, which often leads to the breeding of indoor pests.
Improvement measures: Insect control nets should cover the entire process to prevent pests from invading, and the effectiveness of pest control will be greatly improved.
3. Lack of comprehensive supporting measures
Most vegetable farmers do not pay attention to the use of comprehensive supporting measures, only adding insect nets to reduce the invasion of pests, and the quality of vegetables cannot be greatly improved.
Improvement measures: In the cultivation of insect net coverage, heat-resistant and disease resistant vegetable varieties can be selected, and decomposed and pollution-free organic fertilizers can be applied. At the same time, combined with micro spraying technology, biological pesticides can be selected, and pollution-free water sources can be used for irrigation. The application of these supporting measures can achieve pollution-free standards for vegetables, greatly improve their quality and taste, and correspondingly increase the income of vegetable farmers.