Apple top leaf curl moth, is an important pest in apple production, distributed in China, belongs to a more serious pest. Why do you say that, look at its harmful characteristics, you will be clear.
<h1>1. Hazard characteristics</h1>
This pest only attacks the leaves, and occasionally damages the young fruits, which are the main food source and harm the young fruits just to change the taste. It likes young tissue, young shoots, young leaves, young fruits, young shoots, it will not let go. It is good at hiding, hiding in the leaves as a cocoon for wintering, hiding in the insect bag on the back of the leaves to feed, laying eggs on the back of the leaves, bringing great difficulties to prevention and control. Larvae will spit silk curl leaves, make insect bags, and hide in it, not only is it not easy to be killed, but will kill a large number of natural enemies, destroy the ecological balance, if there are peach trees, pear trees near the orchard, their presence is not pest to provide rich food and living environment, resulting in indiscriminate harm to pests.
It is worth noting that the pest rolled up the pest belt is very strong, by hand breaking, you can see the internal insect filament is very tightly wound, must be cut with a knife, they are harmful leaves, the leaves are rolled into clumps, bite off the petiole, nibble on the flower buds, after eating there is no need to eat and will be transferred to other fruit trees, affecting plant growth, affecting fruit yield and quality, if not prevented in time, it will cause significant losses.
<h1>2. Occurrence law</h1>
The apple-tipped roll moth, which can occur in 4 generations a year, overwinters mainly as larvae in the dry curly leaves at the top of the branches, but also a small number of overwinters between the lateral buds and leaf axillaries. After the apples sprout, the larvae begin to pest, and in mid-to-late April, they move to the top of the new shoots and roll up the young leaves. After the larvae mature, they also cocoon the pupae in the curly leaves, which can be harmed until October.
<h1>3. Prevention and control measures</h1>
(1) Agricultural control
Combined with winter pruning, pruning diseases and insect shoots, sweeping away fallen leaves and weeds, pruning dead branches, focusing on bringing out the orchard to burn, eliminating overwintering remnants. During the growth period, in mid-to-late April, remove the insect shoots on the tree body, roll the leaves, burn them intensively, kill the larvae in them, reduce the density of the insect population, and reduce the harm. After the leaves fall, the orchard is thoroughly cleaned, the disease residue in the garden is removed, and the population base of the overwintering insect is reduced.
(2) Physical prevention and control
Pests have weak phototropism, you can use this, with light to lure, not only to attract other pests, but also to the top of the curl moth adult.
(3) Biological control
Conditionally, the red-eyed wasp can be released during the peak of spawning, and the pest elimination effect is very good.
(4) Chemical control
Evenly spray fruit trees with methamido avermectin benzoate or carbohydrazide or highly effective cypermethrin.