Citrus rust ticks, is a well-deserved citrus "face value killer", caused by it citrus black peel fruit, will seriously affect the price, do not be careless!
This year's temperature is abnormal, especially pay attention to rust ticks, may focus on inspection, pay attention, "prevention" is much more important than "treatment"!
Rust ticks harm the fruit
<h1>Meet the rusty ticks</h1>
Rust ticks, also known as citrus rust mites, citrus rust mites, rust spiders, commonly known as copper disease. The rusty spider is small, invisible to the naked eye, requires a magnifying glass to see, and is shaped like a carrot.
There is a folk saying called "one year copper three years poor", which accurately describes the harm of rusty ticks. Rust ticks occur in various citrus producing areas in our country, and the damage rate is as high as 50%. From May to November, of which July-September is the peak period.
When is the best time to prevent it? It is important to remember that early to mid-May is the best time for the first medication.
Rust ticks into mites
<h1>Harmful symptoms</h1>
Citrus rust ticks harm the back and fruit of citrus leaves, mainly under the canopy and inside the inner chamber. After the leaf is damaged, a dark brown reticulated pattern appears on the back, which can cause a large number of leaves to fall.
Rust ticks harm the leaves
After the fruit is damaged, the surface is black or cork-colored, the fruit is small and stiff, the skin is thick, the taste is sour, and the fruit is also commonly known as "black peel fruit" after the fruit is killed.
<h1>Regularity of occurrence</h1>
In order to effectively control rusty spiders, we must first understand the growth and harmful habits of rusty spiders.
Rust ticks belong to the mites, and the single life cycle passes through three insect stages of egg stage, mite stage and adult mite, and occurs in about 18-22 generations in China.
Rust ticks occur regularly
Rust ticks can be spread by wind, insects, seedlings and agricultural tools, and typhoons and rains have a significant scouring effect on rust ticks.
<h1>Prevention and control methods</h1>
1. Biological control
The natural enemies of the protection and utilization of rust ticks are mainly Thompson polychaetes, mite-eating ladybirds, predatory mites, mite-eating thrips and grasshoppers. Among them, polychaetes are the most effective inhibition of natural enemies of rust ticks, and when rust ticks are in full bloom, the use of fungicides should be avoided to protect polychaetes, therefore, it is not appropriate to use copper preparation fungicides such as Bordeaux to prevent diseases and insect pests.
2. Regular pruning
Regular and reasonable pruning, so that the canopy ventilation and light, reduce the occurrence of insect pests, but also conducive to pesticide coverage.
3. Clear the garden in winter
In winter, the orangery leaves are removed and the lime sulfur mixture, acaricide and malathion are sprayed.
4. Chemical control
Carefully do a good job of monitoring, from May onwards, often check, on the leaves or on the fruit per field of view (10 times handheld magnifying glass for 1 field of view) there are 2 to 3 heads of insects, in the spring of the year when the back of the leaf appears to be harmed, orchard found in a fruit is damaged when the prevention and control.
For chemical control methods, it is recommended not to use broad-spectrum insecticides as much as possible, and not to use insecticides with the same type of insecticidal mechanism for a long time.
<h1>Prevention and control programme reference</h1>
1.8% avermectin 1500 times + 5% lice mite urea 1500 times
1.8% avermectin 1500 times + 15% zoloftamide 1500 times
Mineral oil 200 times + 22% avie spirostin 2000 times
Avi Triazoltin 1000 times (no shoots July-October)
So when to take the drug? Rust ticks occur between May and October, and prevention can be carried out in a planned manner from early May.
Rust ticks occur all over the harmful period
It begins to occur from the end of May to the beginning of June, preferably in mid-to-late May to start the first comprehensive control of rust ticks;
June to August is a high incidence period, and it is also necessary to focus on prevention and treatment;
From September to October, rust ticks begin to shift to the autumn shoots to harm the leaves, to observe in time, actively use medicine, it is best to fight with the red spider and miscellaneous insects.
Spraying site: give priority to spraying the inside and lower parts of the canopy, and then spray the outer and upper parts of the canopy (focusing on the back of the leaves and the shady side of the fruit); spraying time: before 10 a.m. or after 5 p.m.; spraying standard: be careful and thorough, be sure to spray until the leaves and fruits are wet, generally spray 2-3 times, each interval of 7-10 days.
What else do you want to know about citrus rust ticks?
<h1>Click "Learn More" to watch the video for free! </h1>
<h1>Click to follow, every day there is a new harvest Oh! </h1>