Today passing by a peach tree garden, I found that the leaves on some branches of a peach tree only have petioles or stems, and when I walked in, some of them even did not exist at the petiole. Some of its leaves are mutilated, and many small green larvae are attached to the edges of the leaves to nibble on the leaves. Needless to say, the mutilated leaves are also the result of these larval infestations.
Take a closer look, although the number is not much, but the speed of nibbling on the leaves is very fast, to eat at this speed, in a few days, the leaves of this peach tree will be eaten away. From the picture, do you know what kind of worm this is? I think that if you are not an expert in this area, you should not be able to subdivide such insects carefully.
Unfortunately, I am not an insect expert, and I have not broken down what kind of insect it is, only that this is called a leaf bee larvae. Why don't you know, because Ye Feng has more than 9,000 kinds, not an insect expert, and indeed can't be subdivided. But although it cannot be subdivided, it is also known about leaf bees. In general, adult leaf bees feather in spring or early summer and have a short lifespan and are longer in the wild. Some adults do not feed, while others feed on water, nectar, pollen, leaves, and other insect secretions.
Leaf bees often lay their eggs on leaves, stems, twigs, shoots or cones, mostly in plant tissues and a few on leaf surfaces. The larvae feed on the leaf surface, or on latent leaves, galls, curled leaves, moth stems, moths, moths, moth petioles, and borers. Some leaf bee larvae only feed on old leaves and not on young leaves. The larvae feed for varying lengths, usually about 3-4 weeks. The larvae of many species of leafy bees initially cluster in groups in specific formations to feed, and later disperse to feed. Mature larvae form cocoons under dead branches and leaves, in the soil or in the host xylem, stem or plant fruit.
Most leaf bees occur once a year, the adults feather in late spring and early summer, live for about 10-30 days, die shortly after spawning, and are completely separated from the larval stage. Most of the larvae are scattered and hidden, and after old maturity, they enter the soil for more summer and winter, and pupate in the soil in the spring of the following year, and the pupal period is very short, generally feathering after 5-10 days. Some leaf wasps are two or more generations a year, and many of the multi-generation species pupate in some parts above the plant ground, while others still pupate in the soil.
Many plants are harmed by leaf bee larvae, whether vegetables, flowers, fruit trees, or other herbaceous plants, are the target of leaf bee larvae. Usually, the leaf bees that harm fruit trees mainly include pear simple vein stem bees, pear fruit leaf bees, plum fruit bees, peach leaf bees, hawthorn strong hammer horn leaf bees and so on. The hatching larvae of leaf bees will line up and nibble on the leaf flesh from the edge of the leaves of the fruit tree. With the increase of insect age, the amount of food increases, the harm gradually increases, and the feeding leaves show large irregular absences.
When the amount of insects is very large, more than a dozen larvae are often clustered on each leaf, and the leaves and young shoots of the whole garden are eaten within 2 to 3 days, and only the main veins and branches of the leaves remain. After eating the leaves in its place, and then transferred to other nearby plants to continue to nibble, a large area of orchard leaves are eaten, it will directly affect the growth of fruit trees, so that the fruit quality of fruit trees is affected, and when serious, it will lead to the death of the entire plant.
Therefore, when we find that a small number of leaf bee larvae harm fruit trees, we must take measures to strengthen control. If it is found late and a large area has already occurred, it is necessary to unify prevention and rule in order to effectively control the occurrence and harm of leaf bees in the entire region. In general, the main measures to control leaf bees as harmful to fruit trees are usually the following:
A complete clearance of the garden. According to the relatively fixed habits of the leaf bees in the wintering place, in early spring and late autumn, the orchard leaves, weeds, dead branches, diseased and insect zombie fruits are removed, the coarse, old, upturned and diseased bark is scraped, and the deep burial or burning is concentrated; and the orchard row is deeply overturned, and the shallow hoe tree tray is destroyed to destroy the pest overwintering place and reduce the source of insects.
B Tie booby traps. According to the overwintering habit of the leaf peak larvae under the tree, after fruit picking, a circle of straw, wheat grass, sack pieces or special insect belts for fruit trees are tied in the middle and upper part of the main trunk of the fruit tree to induce the larvae of the lower tree to hide. In winter, when the garden is cleared, the bindings are untied and burned or buried deeply to eliminate the overwintering larvae.
C catch adults. Using the time when leaf bees are mating and crawling on the young shoot branches during the peak of spawning, the adult insects are artificially captured, and the capture of one female bee is equivalent to the elimination of 50-60 larvae. It is also possible to squeeze the hatched larvae to death by squeezing the spawning site with your fingers while the larvae are hatching. If the larvae have hatched and the damage area is not large, and the fruit tree is not too tall, it can be eliminated by manual hunting.
D Chemical Control. Chemical control uses green environmental protection pesticides for prevention and control, but if it is the expansion period of fruit, it is best to take agricultural control or biological control. However, if the area is too large, it is necessary to take chemical control, both in the field of larvae and spray control on the tree, but also in the autumn leaf bee in large numbers, combined with the tree under the tree at the same time to kill the larva attached to the ground and weeds. Chemical control can be sprayed with 40% Oxylego 1000 times liquid or cypermethrin 2000 times liquid spray.
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