Leaf curl moths mainly include triangular neo-curl moths, gray-white striped curl moths, rounded horn curl moths, citrus long roll moths, citrus brown band roll moths, small yellow curl moths, post-yellow curl moths, citrus yellow curl moths, all of which belong to lepidoptera.
Leaf curl moths are distributed in fruit tree producing areas such as citrus, lychee and longan in China. Leaf curl moths are mainly harmful to young leaves and flower ears, the larvae spit silk will be young leaves, flower utensils into clumps, and hide in them to feed as a pest, when the damage is serious, the young leaves are mutilated and broken, the flower organs are mutilated and dead and fall off.
How to effectively prevent it?
First of all, strengthen the cultivation management work, in each new shoot stage of the fruit tree, adhere to the rational fertilization, promote the new shoots to be neat and robust, shorten the suitable leaf curl moth adult egg laying, reproduction required age period, in order to reduce the harm.
Secondly, pay attention to clearing the garden in winter, prune the branches and leaves of diseases and insect pests, sweep away the dead branches and leaves on the ground of the tree tray, eliminate some insect sources, and combine the cultivation of weeds to eradicate the weeds in the orchard and reduce the base number of overwintering insect populations. In the new shoot stage, flower ear extraction stage and young fruit stage, when inspecting the orchard or combining the thinning of flowers and fruits, it is found that there are leaf curl buds, flower spikes, weak dense shoots and young fruits that are damaged, and they are hunted and killed.
Finally, in addition to emphasizing the scientific use of chemical pesticides to protect natural enemies and exert the natural control role of natural enemies, in the early stage of the occurrence of a large number of pests, orchards with large insect population density, do a good job of insect situation investigation in the new shoots, flower spike extraction period and in the flowering to young fruit stage, grasp the initial incubation of larvae to the incubation period, and spray the drug 1 to 2 times in time.
In the bud stage, the less toxic biologics are generally selected, such as 800 times the solution of B.t biological preparations, or 600 times of the wettable powder of compound insect mite treatment; before flowering, the new shoot stage and the young fruit stage, one of the following agents can be selected to spray: 50% Bataan wettable powder 1500-2000 times liquid, or 5% high-efficiency decanter emulsion, or 30% double emulsion 2000 to 2500 times liquid, or other perigylin insecticide mixed with biological insecticide.