Citrus leafminer moth, belonging to lepidoptera, leafminer moth family, is one of the most important pests in the young shoot stage of citrus, generally in the summer and autumn shoots are more seriously affected, and the spring shoots are lightly affected.
Because the larvae will dive into the leaf flesh on young leaves, young stems and even under the surface of the fruit, leaving irregular silver-white lines, the leafminer moth is called "ghost drawing symbol" and "drawing worm" by fruit friends.
The breeding environment of leafminer moths
High temperature and rainy weather, not conducive to spraying and high humidity, leafminer moth is very easy to reproduce.
The abundance of untidy shoots is also conducive to the occurrence of leaf-based moth infestation, which is seriously harmful during the peak period of young shoots from July to August every year. It's only now the end of June, and many fruit lovers have already seen a wave of leafminer moths in their orchards, and the pest situation in July and August is terrible!
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Hazards of leafminer moths
Leafminer moths will shrink or harden the leaves, easily fall off, affect photosynthesis, and in severe cases, affect the tree potential and flowering fruit of fruit trees. What is even more abominable is that the leaf wounds caused by leafminer moths have become a breeding ground for ulcer disease, and the damaged leaves also provide a wintering place for pests such as red spiders and leaf curl moths. In this way, the leaf diving moth is really the best assist player in the citrus pest world!
Hazard leaves Daily Learning Farmer Fruit Friend @ Rookie provide pictures
Harmful to fruit
Prevention and control methods
General principles
Adopt the comprehensive prevention and control strategy of "wiping buds and controlling shoots, uniformly releasing adult shoots at low incidence periods, and spraying drugs to protect shoots in a timely manner", focusing on the protection of summer and autumn shoots.
Prevention and control means
1. Agricultural prevention and control
Strengthen the management of water and fertilizer, fertilize half a month before the release of the shoots, and irrigate water in drought, so as to promote the neat and robust pumping of summer and autumn shoots.
At the same time, Huang Wei, an expert in daily agriculture, reminded everyone that it is necessary to try to achieve unified placement, if the new shoots are sent a little bit today and a little tomorrow, the new shoots are very uneven, we cannot spray medicine every day for prevention and control, so it is best to achieve unified placement, thereby reducing the source of insects.
Therefore, be sure to erase the relatively sporadic shoots in the orchard in time, and then put the shoots uniformly, which is conducive to concentrated spraying and canopy shaping, and the effect will be very good.
2. Chemical control
Teacher Huang Wei stressed that for the prevention and control of the night moth, the injection must pay attention to the time point. This node is very important within 1 cm of each new shoot germination. This period of time must be beaten down, if you say that more than this time period of time, spray prevention and treatment is almost ineffective.
Effective agents such as avermectin, fly amine, methylaminoavermectin benzoate (abbreviation: methylvidyl salt), insect mite nitrile and the like are effective against it. You can reasonably choose the use of drugs according to the situation of the orchard and the resistance of the diseases and insect pests in the orchard.
3. Physical prevention and control
Lure lights can be installed in the orchard, which can also reduce the harm of leafminer moths.
4. Biological control
In fact, there are many natural enemies of leaf-diving moths, mainly predatory predators such as Asian and African grasshoppers, as well as parasitic wasps such as white star wasps.
Teacher Huang Wei suggested that everyone should cultivate raw grass in the orchard, and the advantage of raw grass cultivation is to increase the ecological diversity in the orchard and provide a habitat for the natural enemies of pests. This can have an inhibitory effect on pests such as leafminer moths, aphids and even red spiders.
Source of this article: Tiantianxue Agricultural Citrus No
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