Recently, some growers have reported that the leaves of the fruit tree have a strange disease (curly leaves), and the medicine is not effective; through visiting the orchard (peach, plum, apricot, etc.), it is found that the strange disease is not a disease, but an insect pest called apple leaf curling moth.
Apple leaf curl moth belongs to the Lepidoptera leaf curl moth family, also known as apple leaf curl moth, cotton brown band roll moth, slippery skin worm, licking worm, in many places in China, of which the Yellow River, the Yangtze River Basin occurs heavily, can be harmful peach, plum, apricot, apple and other fruit trees, is one of the most harmful pests in the north.
<h1 class="pgc-h-arrow-right" data-track="5" > first, the symptoms of pests of apple leaf curl moth</h1>
Apple leaf curl moths use larvae to infest leaves and fruits. The larvae not only spit silk on the leaves, sneak in the leaves to nibble for harm, resulting in leaf lack of carving or mesh, more importantly, the larvae paste the leaves on the fruit surface to nibble on the peel and flesh, and chew out a lot of scars on the fruit, and even glue, causing residual fruit, so it is called "licking skin worm".
Apple leaf curl moth is harmful to plum leaves
Apple leaf curl moth is harmful to peach leaves
Apple leaf curl moth is harmful to apricot leaves
Apple leaf curl moth harms plum fruit, causing flowing gum and potholes in the peel
<h1 class="pgc-h-arrow-right" data-track="88" > second, the law of occurrence</h1>
The apple leaf curl moth occurs for 3 to 4 generations in a year, the average temperature in spring reaches more than 7 °C, the larvae begin to sting, and the temperature is 12 to 13 °C when the wintering larvae are at peak. The stinging larvae are first harmful to young shoots, flower buds and young leaves, slightly larger and then curl leaves, there is a phenomenon of turning leaves into pests, and the larvae mature in the curly leaves cocoon pupae.
Adults emerge diurnally and nocturnally, have phototropism and chemotaxis, often lay eggs on the back of the leaves, the eggs are arranged in a fish scale-like arrangement, and the larvae immediately spit silk after hatching and spread the leaves to harm, and can nibble on the peel.
<h1 class="pgc-h-arrow-right" data-track="89" >3</h1>
1. Combined with other agricultural activities, agricultural control and control timely cut off the leaf curl buds, eliminate the larvae in the buds, and have the conditions to bagge the fruit to prevent the larvae from nibbling on the fruit.
2. During the adult occurrence period, set up sweet and sour solution, insect attractant lamp, sexual attractant and other traps in the orchard to kill adult insects.
3. Chemical control can be used before the germination of fruit trees in early spring to kill overwintering eggs. After the fruit trees are flowered, they begin to rotate and use poison arrows, three kills, Bo kills and other agents, once every 15-20 days, which can effectively prevent and control the occurrence of insect pests.
4. Biological control in the growing season, can release red-eyed bees in peach orchards, can eliminate insect eggs, in addition, should also pay attention to the protection of natural enemies such as bees, swollen leg bees, velvet cocoon bees and other natural enemy insects.