Why is it forbidden to use insecticides in litchi flowering period?
Experimental research and production practice have proved that the pollination of litchi at flowering stage is the guarantee of high yield of litchi, and the honey brewed by bees collecting pollen is also a natural health food for human beings. In order to prevent bee poisoning and honey contamination, ensure that there are enough workers to collect nectar, improve the effect of pollination and protect human health, litchi is prohibited from spraying insecticides before flowering and before the colony is evacuated. The spraying of litchi during flowering, especially organophosphorus and organochlorine pesticides, is absorbed into plant tissues, part of which is decomposed at the end of flowering and then secreted with honey, and bees are poisoned in the process of sucking honey containing pesticide residues. The results showed that the honey secreted 27 days after spraying omethoate in litchi flowering could still poison the bees. In addition, after the low-toxic nectar is collected and brewed by bees, the toxic content increases, and people's health can not be guaranteed when they eat the honey containing pesticide residues. Therefore, spraying insecticides should be prohibited before litchi blossoms (depending on the residual period of pesticides) and before bees leave the orchard. In addition, there are often more flies in the litchi orchard during flowering. These flies can also help pollinate, but spraying pesticides during flowering will also kill them.
- Prev
Common pesticides and pesticides in pollution-free vegetables
Biological pesticide: BT, the Chinese name is Bacillus thuringiensis, is a bacterial insecticide. This variety has been fully used in the main vegetable areas of our country and achieved good economic benefits. But at present, there are many BT manufacturers with different quality, so we must choose the variety with good quality when using it. Note: BT is aged at a slightly higher temperature.
- Next
Talk about the use of BT insecticide on vegetables
It is reported in the newspaper that BT insecticide is used to kill pests. Many vegetable farmers called, some asked how to use BT pesticides, and some talked to reporters about the experience of using BT pesticides in vegetable production. The reporter sorted out the experience of the vegetable farmers who called. BT insecticide, that is, Bacillus thuringiensis.
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi