The current citrus trees are safe through the fruit fall period into the stable fruit period, then the small fruit carries the future of all farmers, farmers are careful to take care of the fruit to grow up, afraid that it will receive a little damage, aphid thrips as long as they see a ding must immediately hit the air defense, but there is a pest, you can not see the naked eye is difficult to control according to the number, can only be controlled according to the season and phenological period, it is - rust tick (rust spider)
(Add little sister WeChat to learn more about planting knowledge Oh WeChat yqs638)
Rusty spider can be described as a citrus beauty killer!
In the orchards where rusty spiders are harmed, the fruits are not only not selling well, but also the fruits are small and stiff, and there is basically no commodity value. Therefore, if the prevention and control management of citrus cultivation and production is improper, it will cause a large number of black peel fruits, which will seriously affect the income of fruit farmers.
Let's take a look at the calendar of common citrus pests
From the above table, it is known that the rust spider began to appear in May, entered the peak period at the end of June, and by July and August, there were already black leaves and peel fruits.
Harmful features of rusty spiders
Leaf lesion characteristics: initially yellow-brown, later black-brown, severe leaves are small, deformed, brittle; those who do not know may think that I am lipid spot macular disease
Fruit damage characteristics: the peel is rough and dull, brown or cork-colored, covered with cracked net-like fine lines, too small and stiff, thick skin, sour taste, poor quality. Yes, the fruits that the rusty spider has harmed have become "luo han guo".
Rust spiders are actually as capable of growing as red spiders, as long as the temperature reaches 15 ° C can reproduce, the most suitable temperature for growth is about 28 ° C, according to statistics, rust spiders can breed 18-24 generations a year, in the tropical citrus region of South Asia, even 24 to 30 generations a year can occur! At an average temperature of 30 °C, it takes only about 9.9 days to complete the first generation...
If it rains, if the rain stops, take medicine, otherwise it is too late.
High temperature and drought are conducive to the breeding of rust ticks, but high temperature is not conducive to the development of its natural enemy polyfacio, therefore, the harm in summer and autumn is more serious, and it is necessary to spray when the medicine is applied.
How to prevent and control it in place?
For the red spider is already so hard to fight,
Rusty spiders are a trickier pest and love to eat fruit!
Being a fruit grower is really sad, anxious and headache!
Actually aimed at rusty spiders
The method and timing of the spray is very important!
one
Note spraying to the fruit and the back of the leaves
Chemical control begins in June, when the black peel fruit appears,
It's about to start, and the spraying is going to be done first in the canopy of the tree,
Around the posterior canopy, pay special attention to the dark side of the fruit and leaf back.
two
The choice of medication is diverse
Like the red spider, rusting spiders also need to be used alternately.
Or mixed medication in severe cases
To fight rusty spiders, you can choose a potion to control red spiders
Such as tetrapyridoxine + avermectin, or spirosome + dimethylamide, or tetrapyridoxine + biformin.
Choose two acaricides (for eggs and adults, respectively) to control together. In addition, Budweiser butythul has been banned at present, and farmers should choose carefully. In addition to the above drugs, you can also choose lice mite urea for prevention and control.
Rest assured that agricultural materials are recommended
Here to recommend the application of pesticides, if friends in the local more difficult to buy, or do not rest assured that the agricultural store choice, you can contact us money small sister procurement, big brand quality manufacturers direct supply, sweep the two-dimensional code on the right side of the product, you can enter the mall to buy, free shipping to home!
Avermectin, the most common and versatile but the market price is different, good raw material avermectin adult insect effect is very outstanding, even if it is not a red rust spider, the effect on leaf-diving moths aphid moths is also very outstanding.
Dimethyl amidine, the new star of insect mites, it is the same as avermectin, insect mites can fight, but also with the shortcomings of avermectin, red rust spider outbreak period and egg stage can not be singled, and for resistance, for the already resistant, the effect of dimethyl amidine will also be reduced. Played with the drug with the effect of egg killing, the effect is to carry the drip, and the snail full of fat with the effect period of more than twenty days is no problem.
Compound drugs of tetramethazine and pyridoxine are new, efficient, broad-spectrum, strong to the touch, fast in effect, and have a long period of effectiveness, which is toxic to the entire stage of mites (eggs, young mites, mites, adult mites).
Snail full of fat, is also a long-term market of acaricides, for high temperature periods are also safe to use, its amaranthic range is wide, and low toxicity and low residue, the effect on eggs is very good, for the outbreak period, and biformin or avermectin mixed to play the effect of carrying drops!
A penny for a penny is always an eternal theorem, the vast majority of inferior products and counterfeit products on the market are flooded, don't use your hard-earned money in exchange for inferior products!
If you want to buy direct supply from big-name manufacturers, welcome to find money little sisters, rest assured that agricultural materials are shipped home!