Alias ​​soybean leafworm belongs to Lepidoptera noctuidae.
Heliothis viriplaca Hufnagel
Damage crops such as beets, peas, soybeans, alfalfa, tomatoes, potatoes, flax, cotton, corn, peanuts, sunflowers and safflowers.
Pests identify younger larvae that damage leaves or eat leaf mesols on the leaf surface. When they grow up, they no longer roll leaves, and encroach on the leaves along the edges of the leaves.
Adults are 13-16 mm in length and 30-38 mm in wingspan, gray-brown. The head and feet are gray. The forewings are grayish brown and greenish blue. The inside horizontal line is not obvious, and the horizontal line and the external horizontal line are green brown or tan broadband. The outer edge is brown and has seven black spots. Ring-shaped brown, surrounded by a central point and 3 small dots. The hind wings are light brown and the mid-horizontal line is a short broad band. The outer horizontal line is dark brown outside, and there are two light brown to white spots near the middle of the outer edge. The eggs are hemispherical, with a chrysanthemum pattern on the egg's top, and longitudinal ridges on the surface of the eggs, varying in length and length. White to yellow-green. The mature larvae are 31-40 mm long. The head is pale brown and there are many black spots. Body color changeable, yellow-green to dark brown, but more light green. The top and back lines are dark brown and the valve lines are yellow-green. Prosthodontic and hip panels yellow. Chest and stomach-foot yellow-green. The connection of the two lateral hairs in front of the chest valve and the lower edge of the valve are not in alignment. The dragonfly is 13-20 mm long, yellow-brown. There is a black milky protrusion on the top of the head, and a pair of long curved spines at the end of the abdomen.
Living habits occur two generations in a year, and they spend the winter in the earth. The adult period appeared in June and August. Adults have a tendency toward molasses and black light. Eggs are scattered on the back of the leaves and can produce 600-700 eggs a lifetime. The newly hatched larvae have the habit of turning the top leaves of the coils and feed them. Or eat leaf meal on leaf surface. When it grows up, it will not curl and leaves a large amount of leaves. It can also harm pods and beans when it is harmed on bean crops. The young larvae fled after being frightened, and the older larvae were suspended and suspended to death. After the larvae matured in the soil, the peaks of the larvae were observed in July and September, respectively. Prevention and control measures (1) Black light and molasses were used to seduce adult worms during the adult period. (2) Controlling the larvae before 3rd instar, 90% trichlorfon crystals, 50% phoxim EC, 50% malathion EC 1000x, or 1% 7051 Insecticidal EC 2000-2500 times , Or 2.5% Dichloramphenicol, 2.5% Kung Fu EC, 10% insecticidal Royal Emulsion, 20% Fenvalerate EC 2000-3000 spray. (3) In the larval rolling stage, the larvae are pinched by the leaf roll.
Heliothis viriplaca Hufnagel
Damage crops such as beets, peas, soybeans, alfalfa, tomatoes, potatoes, flax, cotton, corn, peanuts, sunflowers and safflowers.
Pests identify younger larvae that damage leaves or eat leaf mesols on the leaf surface. When they grow up, they no longer roll leaves, and encroach on the leaves along the edges of the leaves.
Adults are 13-16 mm in length and 30-38 mm in wingspan, gray-brown. The head and feet are gray. The forewings are grayish brown and greenish blue. The inside horizontal line is not obvious, and the horizontal line and the external horizontal line are green brown or tan broadband. The outer edge is brown and has seven black spots. Ring-shaped brown, surrounded by a central point and 3 small dots. The hind wings are light brown and the mid-horizontal line is a short broad band. The outer horizontal line is dark brown outside, and there are two light brown to white spots near the middle of the outer edge. The eggs are hemispherical, with a chrysanthemum pattern on the egg's top, and longitudinal ridges on the surface of the eggs, varying in length and length. White to yellow-green. The mature larvae are 31-40 mm long. The head is pale brown and there are many black spots. Body color changeable, yellow-green to dark brown, but more light green. The top and back lines are dark brown and the valve lines are yellow-green. Prosthodontic and hip panels yellow. Chest and stomach-foot yellow-green. The connection of the two lateral hairs in front of the chest valve and the lower edge of the valve are not in alignment. The dragonfly is 13-20 mm long, yellow-brown. There is a black milky protrusion on the top of the head, and a pair of long curved spines at the end of the abdomen.
Living habits occur two generations in a year, and they spend the winter in the earth. The adult period appeared in June and August. Adults have a tendency toward molasses and black light. Eggs are scattered on the back of the leaves and can produce 600-700 eggs a lifetime. The newly hatched larvae have the habit of turning the top leaves of the coils and feed them. Or eat leaf meal on leaf surface. When it grows up, it will not curl and leaves a large amount of leaves. It can also harm pods and beans when it is harmed on bean crops. The young larvae fled after being frightened, and the older larvae were suspended and suspended to death. After the larvae matured in the soil, the peaks of the larvae were observed in July and September, respectively. Prevention and control measures (1) Black light and molasses were used to seduce adult worms during the adult period. (2) Controlling the larvae before 3rd instar, 90% trichlorfon crystals, 50% phoxim EC, 50% malathion EC 1000x, or 1% 7051 Insecticidal EC 2000-2500 times , Or 2.5% Dichloramphenicol, 2.5% Kung Fu EC, 10% insecticidal Royal Emulsion, 20% Fenvalerate EC 2000-3000 spray. (3) In the larval rolling stage, the larvae are pinched by the leaf roll.
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