In recent years, thrips have become one of the most important pests threatening the industrial cultivation of mangoes, which has been seriously affected
The quality and yield of mangoes reduce the yield of farmers. This article introduces the danger of mango thrips
Pest characteristics and prevention methods are for the reference of fruit growers.
<h1 class="pgc-h-arrow-right" > first recognize the symptoms of thrips harming mangoes:</h1>
1. The thrips in the shoot stage are timely leaf juice on the back of the young, and when it is severe, it can make the leaf back appear a brown and lose
Glossy, later leaf edges curled, wavy, can not unfold, can even dry the leaves.
2. Thrips cause the top buds of the new shoots to be affected, the growth is hindered, and the branches and leaves are overgrown or atrophied, causing the development of young branches.
3. When the thrips endanger the flower spikes and young fruits, it will cause a large number of flowers and fruits, and the surface of the affected young fruits will appear black and brown.
Rusty brown dots can even lead to fruit deformity and tissue thrombosis.
4. Thrips will also harm the petioles, young stems and old leaves of fruit trees, seriously affecting the growth of mangoes, and can also spread efficiently
Plant viruses that seriously affect mango yield and quality.
Knowing the harm of thrips, you may say that it is controlled by insecticides, but fruit farmers use a lot of medicines
However, it does not help, so let's understand why thrips are difficult to prevent?
1, the dry season is easy to occur: climate drought is an important premise for the occurrence of thrips, thrips like warm,
In dry weather, the temperature is 23 °C-28 °C, and the air humidity is 40%-70%.
2, closed, water-scarce orchards suffer heavily: orchards are poorly ventilated and light-transmitting, which creates a suitable shade ring for thrips
environment, and inconvenient to spray, thrips occur seriously. Orchards without irrigation conditions, the soil is dry and water-scarce, favorable
In thrips pupate, feathering, occur in large quantities.
3. Thrips occur all year round, spring, summer and autumn mainly occur in the open field, and female adults are mainly carried out
Parthenogenesis (unlimited reproduction without mating), occasional reproduction of both sexes, and it is extremely difficult to see males. The eggs are scattered in the leaves
Within the meat tissue, 22-35 eggs are laid per female. Female adults live 8-10 days. The egg stage is 6-7 days in May-June.
Thrips reproduce extremely quickly and can cause devastating damage to crops if not controlled in time.
4, thrips resistance is getting stronger and stronger, because thrips breed fast, plus many fruit farmers continue to use the same species
Chemical drugs lead to stronger resistance to thrips, which is also the root cause of the difficulty of thrips to control.
So how to effectively control thrips? What must be followed is "prevention first, comprehensive."
Prevention and control" as the core, the use of physical and chemical methods of comprehensive prevention and control, to see the specific prevention and control plan.
<h1 class = "pgc-h-arrow-right" >1, strengthen the protection of natural enemies in the park</h1>
There are many species of natural enemies of mango orchards, such as broad-bellied mantises, medium-yellow hunting bugs, and li bugs
Leafhopper and Lepidoptera larvae reduce the number of insect mouths.
<h1 class = "pgc-h-arrow-right" >2, scientific and reasonable field management</h1>
Strengthen the management of mango fields, thoroughly clear the garden, remove weeds and dead branches and leaves in the field, and dry them when conditions permit
Reduce the insect population base; Reasonable pruning, appropriate pruning of some branches in the shape of closed trees, enhance ventilation
Phototrophic; According to the phototropism and chemotaxis of insects, black light lamps, yellow/blue plates, sweet and sour liquid, etc. are used to induce
kill.
<h1 class = "pgc-h-arrow-right" >3, chemical control</h1>
In sensitive periods such as the young shoot stage, early flowering and young fruit stage of mango, as well as the thrips prone period, use liangguoan
300 times + 600 times Wofon hormone + 1500 times spray of Ao man net matrine to promote leaf aging and reduce thrips
Food sources. When thrips are endangered, it is controlled with a spray spray of Aoman net matrine 1000 times + garlic oil 1000 times.
The same applies to other pests.
It should be noted that thrips are afraid of strong light, and the field migration spreads quickly, so you should choose 3 p.m. (light
When strong, it should be delayed until 4 o'clock) after spraying prevention, and the cycle of spraying and spraying in the morning is too long, and the prevention effect is poor.
<h1 class="pgc-h-arrow-right" > author of this article [Aofeng Chengcheng] More knowledge of plant protection, please pay attention to my headline number, or Baidu search for Aofeng manufacturer Chengcheng or private message to me, click the blue font below 'Learn more'</h1>