How to treat diseases and insects?
In the process of plant growth, it is often threatened by diseases and pests, so how to treat diseases and pests?
Diseases and pests can be solved by physical control, chemical control, biological control and so on.
I. physical prevention and control
There are black light trap, high pressure, sun exposure and other methods.
1. Black light trap
Black light is a kind of special gas discharge lamp, which emits 330-400nm ultraviolet wave. It is a kind of invisible ultraviolet light and has great lethality to agricultural pests.
2. Sunlight exposure
Sunlight has a certain bactericidal power because of its heat, drying and ultraviolet rays, and it also has a certain effect on the removal of diseases and pests.
II. Chemical control
Spray or irrigate with pesticides.
There are many kinds of pesticides, which can be divided into insecticides, acaricides, rodenticide, nematodes, molluscicides, fungicides, herbicides, plant growth regulators and so on.
The type and dosage of pesticides can be selected according to the types of crops and diseases and insect pests.
III. Biological control
The use of natural enemies insects, bacteria, viruses "attack with poison" to achieve the purpose of treating diseases and pests.
Organisms used for biological control can be divided into three categories:
① predators: including lacewings, ladybugs, pedestrians, teratophores, amblyseius mites, spiders, frogs, toads, mosquito fish, forktail fish and many insectivorous birds
② parasitic organisms: including parasitic wasps, parasitic flies, etc.
③ pathogenic microorganisms: including Bacillus thuringiensis, Beauveria bassiana and so on.
- Prev
What does rape flower use to spread its seeds?
Every March to April, rape flowers will bloom all over the hillside, very beautiful, and after the flowers thank, they will grow full seeds. So how does rapeseed spread its seeds? How should I plant it? 1. What do rape flowers rely on to spread seeds? rape fruits belong to pods, after ripening.
- Next
Is loquat deciduous or evergreen?
Loquat is a very common fruit. Ripe loquat tastes sweet and nutritious, so do you know whether loquat is deciduous or evergreen? Is loquat deciduous or evergreen? Loquat is a small evergreen tree with a terminal panicle from October to December and May to June of the following year.
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.