Citrus Huanglongbing
As we all know, psyllid is the chief culprit in spreading Huanglongbing. The reason why Huanglongbing spreads rapidly is because of psyllid as a medium. Wood lice occur all year round. Adults began to lay eggs on young leaves from February to March, and a small peak appeared in summer shoots from May to June. July to August, that is, autumn shooting, is the peak of psyllid breeding activities.
Secretly numb citrus psylla
Citrus psyllid is on the back of the leaf.
In order to prevent and control psyllid, chemicals are widely used. In fact, psyllids are relatively easy to eliminate, but they are afraid of being missed. Generally speaking, people use these chemicals for prevention and control.
First, chemical control.
The main means to control psyllid is spraying drugs, so it is suggested to choose efficient and quick-acting drugs, and pyrethroids are the first choice.
Effective agents: thiamethoxam, Kung Fu, imidacloprid, cyanogen chloride? Keywords profenofos, emamectin benzoate, high chlorine? Acetamiprid, etc.
Second, the prevention and treatment of internal absorption
This prevention and treatment is mainly carried out by using systemic drugs, mainly thiamethoxam and thiamethoxam, also known as drug fertilizer. At present, sugar cane uses medicine and fertilizer, mainly pesticides and chemical fertilizers. Pesticides can be absorbed into sugar cane to control some pests such as sugarcane borers.
So at present, some people want to use chemical fertilizer to control citrus psylla, but because citrus trees are still relatively large, I don't know if the dosage is enough. This is also a good control idea, but it is still in the experimental stage.
Third, biological control.
The method of releasing parasitic bees, which lay eggs in the eggs of psyllid, leads to the death of psyllid, but this method is too controllable. A large number of parasitic bees need to be released, and there is no guarantee that all parasitic bees can eliminate psyllids.
Fourth, lure prevention and control.
This kind of control is mainly to hang yellow boards or insecticidal lamps to attract psyllids to fly and stick to the yellow boards. Or some pheromones, so that psyllids can be lured and then concentrated and eliminated.
These are all green methods, but the effect is not ideal at present. Are there any improvement measures?
Of course, Han Qunxin, Li Hao and Liu Xinzhou of Zhong Kai Agricultural Engineering University invented such a device to control citrus psyllid and applied for a utility model patent.
At first glance, it looks like a tender tip, with branches and tender tips.
Oviposition characteristics of citrus psyllid;
The female psyllid lays eggs on the buds of citrus, and the rate of laying eggs on buds larger than 0 and smaller than 5mm is the highest, followed by buds larger than 5mm and smaller than10 mm. When there are buds and new leaves at the same time, citrus psylla will lay eggs on citrus buds, especially on buds larger than 0 and smaller than10 mm.
Therefore, the length of the carrier of the utility model is more than 0 and less than 10mm, and the structure is similar to that of citrus flower buds. After various carriers are distributed in the citrus forest, they can replace the citrus flower buds to become the spawning ground of citrus psyllid, thus reducing the number of citrus psyllid laying eggs on citrus trees, effectively preventing and controlling citrus psyllid and improving citrus yield.
How do you think this patent attracts psyllids to lay eggs by simulating citrus buds, and then destroys these eggs in one fell swoop to achieve the purpose of prevention and control? Welcome to leave a comment.