1.1. Corn budworm, Heliotropha leucostigmalavis (Butler), also known as the corn worm, is a Lepidoptera, Noctuidae. A year after generation, the larvae are usually in the seedling stage, which harms crops such as corn, millet and sorghum, and can also harm wild weeds such as goosegrass, alfalfa and so on. In the 1970s, the genus Corydalis had a heavier occurrence in Changchun and Tonghua areas of our province. In recent years, it occurred sporadically in all parts of the province. It is a secondary pest of corn fields, and the damage degree is below the economic loss threshold.
1.1.1 Morphological characteristics The adult body is 18-20mm long and has a wingspan of 30-40mm. The fore wing is yellow-brown to dark brown, with an elliptical pale yellow spot on the top of the wing, a dark brown kidney-shaped spot in the middle, and a black fox-shaped pattern on the leading edge. Egg: yellowish white, oblate, 0.5mm long. Larva: yellow-gray, body length 26-40 mm, black and brown hairs on the abdomen, dark brown on the hips, bulging on the trailing edge, five upward claw-like protrusions on the top, and the largest protrusion in the center.蛹: reddish brown, 17-23mm long.
1.1.2 Occurrence and Harmfulness The corn budworm has been in the province for one generation a year, and the eggs are overwintered on weeds. In the middle of May of the next year, the hatching will be carried out. The hatching larvae will feed on the weeds that have returned to the green. In early June, the plants will be damaged to the corn. The first-instar larvae will start to harm, and the damage before and after the seedlings will be high. The larvae mostly invade from the underground part of the stems of corn seedlings. The larvae after intrusion feed upwards, sometimes from the roots of the corn, and the damaged corn seedlings are dry, and very few cut the young stems of the corn. There are harmful habits of transgenic plants. Generally, the low-lying area is serious, and the larva damage period is about one month. At the end of June, it is phlegm at 5 to 15 cm below the victim plant. In early July, it is the peak of the phlegm. From July to August, the adult worms fly to the weeds. Spawning, each female moth can lay more than 200 eggs, with eggs overwintering. Adults have phototaxis, and larvae have a habit of killing each other, usually only one larva. In May, the rain was coordinated, the climate was humid, and it happened. Corn fields are close to grass wasteland or continuous cropping.
1.1.3 Control measures Agricultural control Eliminate weeds in the field and reduce the source of overwintering insects. Chemical control Use 90% crystal trichlorfon 1000 times, 80% dichlorvos EC 1000 times, root irrigation, 200 kg per acre. Use 1 kg of 92.5% trichlorfon powder, mix 20 kg of fine soil, and sprinkle around the corn roots.
1.2. Spirulina sinensis [Apophylis flavovirens (Fairmaire)] is commonly known as corn mites, belonging to the order Coleoptera, Lepidoptera. It is mainly distributed in Northeast China, North China, East China and South China. It mainly harms corn and also harms sorghum and millet. Adults also like to eat certain weeds. The corn worm was found in the northern part of China in the 1950s. In recent years, the damage occurred in Siping and Liaoyuan in our province.
1.2.1 Morphological characteristics Adults: 5-6 mm in length, all densely covered with yellow fine hair. The head is dark brown and the compound eyes are black. The front chest is yellow, the width is longer than the long, the middle and the two are measured with depressions, no edge is measured, the chest and the coleoptera are covered with small engraving points, and the coleoptera is emerald green and shiny. Yellow foot. Egg: Oval, milky yellow at the time of birth, gradual yellow to brown, about 0.6mm long. Old mature larvae are 8-10mm in length. The head is brown, the abdomen is ginger, and the front chest plate is reddish brown. There are reddish-brown flakes in each section from the middle chest to the end of the abdomen. There are 4 on each side of the middle and back chest, and 5 on each side of the abdomen 1-8.蛹: Yellow nude, 6mm long.
1.2.2 Occurrence and Harmfulness A generation occurs in one year, mainly harming corn, and also damaging sorghum and millet. Adults live during the day and inhabit the plants at night. Once they are touched, there are suspended animations. Adults lay eggs in the loose corn field. Each female can lay more than 10 eggs, forming a group, and more than 20 to 30. The larva breaks into the base of the corn seedlings. The larvae are lurking near the rhizosphere of the corn. The young larvae are from the rhizome, drilled into the stem from the near surface, and the larvae then return from the pupil, drilled into the ground, and the brown hole at the pupil. The larvae have multiple plants at the seedling stage, and the seedlings grow to nearly 30 centimeters. They rarely change the plant damage. The light holes appear on the leaves of the leaves, the leaves are thick, the heavy ones are wilting, and the leaves are often formed. Heart seedlings, heavy ones are more scorpion, plants are subsoiled, commonly known as "Junzi Lan Miao", can not be normally formed. The old book larvae are used as soil chambers in the depths of 2cm-3cm near the rhizosphere.
1.2.3 Control measures Mainly carry out reasonable rotation to avoid flail planting to reduce the hazard. Chemical control, 25% of carbaryl (carbaryl) can be applied powder, 1-1.5 kg per mu, mix 20 kg of fine soil, stir evenly, in the early stage of larval damage (corn seedling stage) sloping in the corn Around the roots, killing larvae that are harmful to the transfer. Use 1000% crystal trichlorfon 1000 times; 80% dichlorvos 1500 times spray, spray 60-75 kg per acre.
1.3 Mongolian gray weevil Mongolian gray elephant weevil Xylinophorus mongolicus Faust Common name to the nose, small cattle, gray old. Is a coleoptera, like a family. In China, it is mainly distributed in the northeast, north China, Inner Mongolia and other provinces, and is a corn seedling pest. The main insects harm soybeans, corn, sunflower, peanuts, sugar beets and other seedlings, young leaves, heart leaves, when the damage is heavy, the leaves can be light, bite off the top of the stem, resulting in lack of seedlings and ridges, heavy damage in dry years. Our province is mainly harmful in Baicheng, Songyuan and Shuangliao.
1.3.1 Morphological characteristics Adult worms are 4.7-5.8 mm long, dark gray or earthy, with brown and white scales. The head is slender, the female in the front chest plate is short and wide, the male is narrow and long, and the hind wings are not obvious. The tentacles are rod-shaped. The upper part of the coleoptera is black with two yellowish spots, and the front of the two spots is smaller. The lower half of the coleoptera is yellow. The chest is black on the belly, the belly is yellowish brown, and the body is grayish white. Larva: Body length 6-9mm, milky white, slightly curved, followed by a pentagonal brown shift. The carcass is 5-6mm long, oval, milky white.
1.3.2 Occurrence rules and living habits The province has a generation every two years (some individuals need 3 years), and the adults and larvae overwinter in the soil. In the first year, the larvae overwintered. From the second half of June to the middle of July of the second year, they still lived in the soil after emergence, and the adults became unearthed in the third year. Adults have a group of inhabitants. When they are cold, they are lurking in the clods around the seedlings. After the temperature rises, they climb out of the activity. They like to eat the young shoots and stems, which often cause large areas of seedlings and ridges. The females are in early May. Spawn on the ground. When spawning, first use the foot to level the ground and then divide it into the ground. New larvae hatch in late May. The larvae feed on humus and plant roots. In September, the larvae make the soil room overwinter. Continue feeding after winter.
1.3.3 Control measures Apply high-efficiency systemic pesticide dressing to treat other seedling pests. (1) g as EC borer 300-400 mL / ha. (2) 5% methamidophos EC, spray dilution 500-1000 times. (3) chemical control with 50% new EC parathion, omethoate 40% EC and 50% EC malathion, phosalone 35% EC, 50% fenitrothion EC, or 50% phosmet EC spray 800 times, 50 to 50 kilograms per acre.
1.4 Red-brown gray moth, Polia illoba (Noctuidae) belongs to the order Lepidoptera, Noctuidae, and distributed in Northeast China, North China, East China and other places. The insects are heterozygous, mainly harmful to soybeans, still harmful to corn, alfalfa, beet, mulberry, cotton, peas, onions, carrots and other larvae damage maize leaf biting into a notch, corn pest hazards since 2000, in Gongzhuling, Jilin, Changchun, first discovered hazards and hazardous raw trend goes to endanger rate 10-20%.
1.4.1 Morphological characteristics Adult body length 16mm, wingspan 38-41 mm, head chest reddish brown, belly brown, front wing reddish brown, ring and kidney pattern oval, not obvious; lateral horizontal line brown, zigzag; The line is dark brown, compared to the group. The hind wings are brown and the base is shallow. Oval, yellowish white at birth, darker gradient. The larvae are 39-43mm in length and have a brown head. The body color is green to yellowish brown. The valve lines on both sides are yellow or white, wide and obvious, and the sub-back line and the valve line are composed of small black and brown circles. The carcass is about 20mm long, spindle-shaped, reddish-brown, with a thin tail and a pair of hip thorns.
1.4.2 Living habits Two generations occur in our province in one year. Overwintering in the soil, the adult period occurs from late April to early September, and the mid-late to late June and mid-June to mid-September are the larval hazards, from late June to mid-July. In the first half of October, during the pupation period, adults lay eggs on the leaves of plants, and each egg has about 150 eggs.
1.4.3 50% new sulphur phosphorus emulsifiable concentrate, 40% omethoate EC, 50% malathion EC, 35% phorbol emulsifiable concentrate, 50% chlorpyrifos EC, or 50% imipenem Emulsified 800 times liquid spray, 50-50 kg per mu.
From: Jilin Province Agricultural Technology Extension Station
1.1.1 Morphological characteristics The adult body is 18-20mm long and has a wingspan of 30-40mm. The fore wing is yellow-brown to dark brown, with an elliptical pale yellow spot on the top of the wing, a dark brown kidney-shaped spot in the middle, and a black fox-shaped pattern on the leading edge. Egg: yellowish white, oblate, 0.5mm long. Larva: yellow-gray, body length 26-40 mm, black and brown hairs on the abdomen, dark brown on the hips, bulging on the trailing edge, five upward claw-like protrusions on the top, and the largest protrusion in the center.蛹: reddish brown, 17-23mm long.
1.1.2 Occurrence and Harmfulness The corn budworm has been in the province for one generation a year, and the eggs are overwintered on weeds. In the middle of May of the next year, the hatching will be carried out. The hatching larvae will feed on the weeds that have returned to the green. In early June, the plants will be damaged to the corn. The first-instar larvae will start to harm, and the damage before and after the seedlings will be high. The larvae mostly invade from the underground part of the stems of corn seedlings. The larvae after intrusion feed upwards, sometimes from the roots of the corn, and the damaged corn seedlings are dry, and very few cut the young stems of the corn. There are harmful habits of transgenic plants. Generally, the low-lying area is serious, and the larva damage period is about one month. At the end of June, it is phlegm at 5 to 15 cm below the victim plant. In early July, it is the peak of the phlegm. From July to August, the adult worms fly to the weeds. Spawning, each female moth can lay more than 200 eggs, with eggs overwintering. Adults have phototaxis, and larvae have a habit of killing each other, usually only one larva. In May, the rain was coordinated, the climate was humid, and it happened. Corn fields are close to grass wasteland or continuous cropping.
1.1.3 Control measures Agricultural control Eliminate weeds in the field and reduce the source of overwintering insects. Chemical control Use 90% crystal trichlorfon 1000 times, 80% dichlorvos EC 1000 times, root irrigation, 200 kg per acre. Use 1 kg of 92.5% trichlorfon powder, mix 20 kg of fine soil, and sprinkle around the corn roots.
1.2. Spirulina sinensis [Apophylis flavovirens (Fairmaire)] is commonly known as corn mites, belonging to the order Coleoptera, Lepidoptera. It is mainly distributed in Northeast China, North China, East China and South China. It mainly harms corn and also harms sorghum and millet. Adults also like to eat certain weeds. The corn worm was found in the northern part of China in the 1950s. In recent years, the damage occurred in Siping and Liaoyuan in our province.
1.2.1 Morphological characteristics Adults: 5-6 mm in length, all densely covered with yellow fine hair. The head is dark brown and the compound eyes are black. The front chest is yellow, the width is longer than the long, the middle and the two are measured with depressions, no edge is measured, the chest and the coleoptera are covered with small engraving points, and the coleoptera is emerald green and shiny. Yellow foot. Egg: Oval, milky yellow at the time of birth, gradual yellow to brown, about 0.6mm long. Old mature larvae are 8-10mm in length. The head is brown, the abdomen is ginger, and the front chest plate is reddish brown. There are reddish-brown flakes in each section from the middle chest to the end of the abdomen. There are 4 on each side of the middle and back chest, and 5 on each side of the abdomen 1-8.蛹: Yellow nude, 6mm long.
1.2.2 Occurrence and Harmfulness A generation occurs in one year, mainly harming corn, and also damaging sorghum and millet. Adults live during the day and inhabit the plants at night. Once they are touched, there are suspended animations. Adults lay eggs in the loose corn field. Each female can lay more than 10 eggs, forming a group, and more than 20 to 30. The larva breaks into the base of the corn seedlings. The larvae are lurking near the rhizosphere of the corn. The young larvae are from the rhizome, drilled into the stem from the near surface, and the larvae then return from the pupil, drilled into the ground, and the brown hole at the pupil. The larvae have multiple plants at the seedling stage, and the seedlings grow to nearly 30 centimeters. They rarely change the plant damage. The light holes appear on the leaves of the leaves, the leaves are thick, the heavy ones are wilting, and the leaves are often formed. Heart seedlings, heavy ones are more scorpion, plants are subsoiled, commonly known as "Junzi Lan Miao", can not be normally formed. The old book larvae are used as soil chambers in the depths of 2cm-3cm near the rhizosphere.
1.2.3 Control measures Mainly carry out reasonable rotation to avoid flail planting to reduce the hazard. Chemical control, 25% of carbaryl (carbaryl) can be applied powder, 1-1.5 kg per mu, mix 20 kg of fine soil, stir evenly, in the early stage of larval damage (corn seedling stage) sloping in the corn Around the roots, killing larvae that are harmful to the transfer. Use 1000% crystal trichlorfon 1000 times; 80% dichlorvos 1500 times spray, spray 60-75 kg per acre.
1.3 Mongolian gray weevil Mongolian gray elephant weevil Xylinophorus mongolicus Faust Common name to the nose, small cattle, gray old. Is a coleoptera, like a family. In China, it is mainly distributed in the northeast, north China, Inner Mongolia and other provinces, and is a corn seedling pest. The main insects harm soybeans, corn, sunflower, peanuts, sugar beets and other seedlings, young leaves, heart leaves, when the damage is heavy, the leaves can be light, bite off the top of the stem, resulting in lack of seedlings and ridges, heavy damage in dry years. Our province is mainly harmful in Baicheng, Songyuan and Shuangliao.
1.3.1 Morphological characteristics Adult worms are 4.7-5.8 mm long, dark gray or earthy, with brown and white scales. The head is slender, the female in the front chest plate is short and wide, the male is narrow and long, and the hind wings are not obvious. The tentacles are rod-shaped. The upper part of the coleoptera is black with two yellowish spots, and the front of the two spots is smaller. The lower half of the coleoptera is yellow. The chest is black on the belly, the belly is yellowish brown, and the body is grayish white. Larva: Body length 6-9mm, milky white, slightly curved, followed by a pentagonal brown shift. The carcass is 5-6mm long, oval, milky white.
1.3.2 Occurrence rules and living habits The province has a generation every two years (some individuals need 3 years), and the adults and larvae overwinter in the soil. In the first year, the larvae overwintered. From the second half of June to the middle of July of the second year, they still lived in the soil after emergence, and the adults became unearthed in the third year. Adults have a group of inhabitants. When they are cold, they are lurking in the clods around the seedlings. After the temperature rises, they climb out of the activity. They like to eat the young shoots and stems, which often cause large areas of seedlings and ridges. The females are in early May. Spawn on the ground. When spawning, first use the foot to level the ground and then divide it into the ground. New larvae hatch in late May. The larvae feed on humus and plant roots. In September, the larvae make the soil room overwinter. Continue feeding after winter.
1.3.3 Control measures Apply high-efficiency systemic pesticide dressing to treat other seedling pests. (1) g as EC borer 300-400 mL / ha. (2) 5% methamidophos EC, spray dilution 500-1000 times. (3) chemical control with 50% new EC parathion, omethoate 40% EC and 50% EC malathion, phosalone 35% EC, 50% fenitrothion EC, or 50% phosmet EC spray 800 times, 50 to 50 kilograms per acre.
1.4 Red-brown gray moth, Polia illoba (Noctuidae) belongs to the order Lepidoptera, Noctuidae, and distributed in Northeast China, North China, East China and other places. The insects are heterozygous, mainly harmful to soybeans, still harmful to corn, alfalfa, beet, mulberry, cotton, peas, onions, carrots and other larvae damage maize leaf biting into a notch, corn pest hazards since 2000, in Gongzhuling, Jilin, Changchun, first discovered hazards and hazardous raw trend goes to endanger rate 10-20%.
1.4.1 Morphological characteristics Adult body length 16mm, wingspan 38-41 mm, head chest reddish brown, belly brown, front wing reddish brown, ring and kidney pattern oval, not obvious; lateral horizontal line brown, zigzag; The line is dark brown, compared to the group. The hind wings are brown and the base is shallow. Oval, yellowish white at birth, darker gradient. The larvae are 39-43mm in length and have a brown head. The body color is green to yellowish brown. The valve lines on both sides are yellow or white, wide and obvious, and the sub-back line and the valve line are composed of small black and brown circles. The carcass is about 20mm long, spindle-shaped, reddish-brown, with a thin tail and a pair of hip thorns.
1.4.2 Living habits Two generations occur in our province in one year. Overwintering in the soil, the adult period occurs from late April to early September, and the mid-late to late June and mid-June to mid-September are the larval hazards, from late June to mid-July. In the first half of October, during the pupation period, adults lay eggs on the leaves of plants, and each egg has about 150 eggs.
1.4.3 50% new sulphur phosphorus emulsifiable concentrate, 40% omethoate EC, 50% malathion EC, 35% phorbol emulsifiable concentrate, 50% chlorpyrifos EC, or 50% imipenem Emulsified 800 times liquid spray, 50-50 kg per mu.
From: Jilin Province Agricultural Technology Extension Station
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