The living habits of the brown edged green thorn moth, how many leaves a brown edged green thorn mot

The brown-edged green thorn moth belongs to the order Lepidoptera, the spiny moth family, also known as the brown edge green thorn moth, the green thorn moth, the green thorn moth, and the four-point thorn moth, which are distributed all over the country.

1) Morphological characteristics of adults. The body length is about 16 mm, the wingspan is 36 to 40 mm, the head and thorax are green, the antennae are brown, the base of the forewings is brown, the middle is green, the outer margin is yellowish-brown, there are brown stripes at the margins, the margins are brown, and the hindwings and abdomen are light brown.

Ovum. Oblate-oval, about millimeters long, light yellow.

Larvae. It is about 25 mm long, yellow at the time of first hatching, green at 6 instars, yellow-green on the dorsal line, light reddish-brown on the dorsal line, yellowish-brown with black hairs on the spines, and 4 clusters of black bulbs on the ventral end.

Cocoon. Oval, tan about 17 mm long.

Chrysalis. oval, yellowish-brown, encased in a cocoon (Fig. 23).

Fig.23 Brown-edged green thorn moth.

2) A brief history of life, the life of the brown-edged green thorn moth is similar to that of the yellow thorn moth, with one generation occurring in one year in most parts of the north and two or three generations occurring in one year in the south of the Yangtze River, and the adult emergences and eggs are laid from late May to early June, and the larval occurs in July and August. The first generation of pupation occurs in early to mid-June in one year, and the adult emerges and lays eggs from late June to early July, with the peak larval occurrence period from July to August, and the mature larvae form cocoons at the base of the trunk, branch scars, rough bark cracks and branches from late August to late September. For control methods, please refer to the relevant section of the yellow thorn moth.

Adults are nocturnal and nocturnal, have phototaxis, can mate and lay eggs after feathering, and the eggs are mostly laid on the back of the leaves in pieces, and each piece has 10 eggs for fish scales. The young larvae are clustered and slightly more dispersed.

A brown-edged green thorn moth will eat catties of leaves in its lifetime. Because the brown-edged green thorn moth will eat about one or two leaves a day, and will eat about 365 two leaves a year, which is about equal to catties, the lifespan of the brown-edged green thorn moth is about five years, so its lifetime limbs will probably eat catty leaves.

1.Manual control: artificial killing during the pest period when larval swarms are infested; 2.

Black light control: use black light to trap and kill adult insects; 3.Biological control:

In autumn and winter, insect cocoons are picked and put into sarongs to protect and drain parasitic bees; Beauveria bassiana powder containing 10 billion spores per g was used to control l 2nd instar larvae under rain and wet conditions; Purple wasps, parasitic flies 4Pesticide control: spray 90% crystal trichlorfon or 80% dichlorvos EC, 50% malathion EC, 25% imithion EC, 50% pine borer EC, 30% acemethamidophos EC, 90% Bataan wettable powder and other 900 1000 times liquid in time during the larval occurrence period.

In addition, you can also choose 50% phosphine EC 1400 times liquid or 10% Uranus EC 5000 times liquid, rotenone 300 400 times liquid, Nongdile EC 1500 2000 times liquid.

2.Agricultural control: combined with pruning, pruning, weeding, winter garden clearing, soil loosening, etc., remove the overwintering insect body on the branches and weeds, and destroy the underground pupal cocoons to reduce the source of insects in the next generation.

3.Physical control: the use of adult moths with phototaxis habits, can be combined with the control of other pests, in June to August in the moth stage, set up insect trap lamps to trap and kill adults.

4.Pesticide control: For orchards with large insect density, in the incubation period of each generation of larvae, 90% crystal trichlorfon or 80% dichlorvos 800-1000 times liquid can be sprayed, or combined with the prevention and control of other leaf-eating pests, and the implementation of concurrent treatment can be done.

In Guangxi, 2-3 generations occur in a year, and the mature larvae form cocoons in the trunks, branches and leaves or in the soil crevices of the topsoil layer to overwinter, and pupate and emerge into adults in April and May of the following year. The first generation of larvae appeared from mid-June to mid-July, and the second generation from mid-August to late September. The first generation of larvae appeared from early June to late July, and the second generation from August to early to mid-September.

The first generation of larvae of the brown thorn moth appears from mid-June to mid-July, and the second generation from late August to mid-to-late September. Due to the different temperatures in different places, in some areas, the second generation of mature larvae form cocoons earlier, and they can also pupate and emerge in the same year, and produce the third generation of larvae. Adults appear in spring and summer and live in low- and medium-altitude mountainous areas.

Adults are nocturnal and phototaxis;During the day, it lurks among foliage, grass or other shade. In addition, the eggs of the other two species are mostly scattered on the back of the leaves. After hatching, the larvae are clustered in the early instar stage, and only bite the mesophyll, leaving a membranous epidermisOlder larvae gradually disperse and bite from the edge of the leaf to a nick or even eat up the whole leafMature larvae migrate to the base of the trunk, the branches of the branches, and the weeds on the ground or in the soil to pupate.

Latoia consocia walker, alias: green thorn moth, brown edge green thorn moth, four-spotted thorn moth, curved green thorn moth, spicy spicy seed. It belongs to the genus Lepidoptera, the genus of green thorny moths in the family Thorny Moth.

It is placed in large-leaved boxwood, yueji, begonia, osmanthus, peony, peony, apple, pear, peach, plum, apricot, plum, cherry, jujube, persimmon, walnut, coral, chestnut, hawthorn and other fruit trees and poplar, willow, plane tree, elm and other forest trees. The larvae feed on the leaves, the young larvae feed on the mesophyll, leaving only the epidermis, and the leaves are eaten into holes or missing carvings when they are old, sometimes only leaving the petioles, which seriously affects the tree's potential.

Morphological characteristics of the brown-edged green thorn moth: (1) Adult: body length 15 16 mm, body green, compound eyes red.

Antennae filamentous. forewings green, with brown stripes at the base, yellowish-white to brownish-yellow on the outer margins, brown stripes on the margins, dark brown wavy bands and ** stripes on the inner side; The reverse side of the wing is grayish-green. The ventral surface of the body is yellow.

2) Egg: oval, flattened, long diameter mm, milky white at the beginning of laying, and then gradually turn yellow-green to pale yellow.

3) Larvae: 25 mm in length, yellow-green to green. The head is reddish-brown, and the prothorax and dorsal plate are black.

There are 4 nodules from the middle thoracic to the eighth abdominal segment, and there are clumps of yellow prickly hairs on the hair nodules, 3 6 red prickly hairs on each pair of hair nodules on the back of the first abdominal segment, and blue-black prickly hairs on the 4 nodules at the end of the abdomen.

4) Pupa: 13 mm long, oval, milky white to pale yellow at first, and then yellowish-brown. The cocoon is 15 mm long, oval, dark brown.

In the south of the Yangtze River, 2 to 3 generations occur a year, and the larvae form cocoons for the winter. It pupates from late April to early May of the following year. Adults emerge and lay eggs from late May to June, and the first generation of larvae are active from June to late July.

After mid-July, the first generation of larvae mature and pupate one after another, the first generation of adults emerge and lay eggs in early August, the second generation of larvae from mid-August to September are pest-ineffected, and after mid-September, they mature and cocoon for winter.

One generation occurs in Beijing every year, with mature larvae forming cocoons in the soil for winter, pupating and feathering in the following year, adults begin to emerge at the end of early June at the earliest, and adults are at the peak of adult emergence from late June to early July. Mid to late July is the peak of oviposition, the egg period is 3 5 days, the late instar larvae appear in large numbers in mid-August, and then successively go down to the tree into the soil to form cocoons for winter.

Adults lay eggs on the back of leaves, dozens of eggs are arranged in a fish scale-like pattern, and the egg stage is 5 to 7 days. The hatching larvae first feed on the egg shell, then the mesophyll, and the instar larvae gradually eat through the leaf epidermis, and then eat the leaves inward from the leaf edge after the 6th instar. The pre-3 instar larvae had a swarm feeding habit, and the 4th instar larvae began to disperse and feed.

The larval stage is about 30 days, and one larva feeds on 167 170 square centimeters of leaves. Mature larvae crawl down the tree tray and form cocoons in the soil for the winter. Cocoons are mostly formed in a 3 6 cm deep soil layer in the soft soil of the tree disk, or in the grass soil.

In the second year, the pupal stage is 5 46 days, and the adult life span is 3 8 days. Adults are phototaxis.