-
What are the control methods for the soybean yellow-bellied tiger moth?
The larvae of the yellow-bellied tiger moth, called caterpillars or leaf caterpillars, are a major seedling-stage pest of soybeans. At the same time, this pest can also damage corn, foxtail millet, sunflowers, vegetables, weeds and fruit trees. 1. Morphological characteristics: The adult yellow-bellied tiger moth is white, with many black spots scattered on the forewings. The abdomen and back are both yellow, with one black spot in the center of each segment and two black spots on each side; the legs have black stripes, and the femora are yellow. The eggs are hemispherical, creamy white when first laid, later turning grayish yellow; the larvae are earth-yellow on the back and ventral surface
-
Key Points of Soybean Chemical Control Technology and Detailed Usage Methods
Chemical control cultivation is an emerging technology in agricultural production. When applied to soybean cultivation, chemical control can regulate plant growth and development, help increase flowers and preserve pods, and raise yields. Application of rare earth: rare earth is also called rare earth micro-fertilizer or rare earth nitrate, with the trade name Changle Yizhisu. It is a new type of rare earth element fertilizer first developed in China and a key promoted product; at the soybean seedling stage and initial flowering stage, spray once each with rare earth solutions at concentrations of 0.03%-0.04% and 0.08% respectively, which can increase grain protein content by 5.
-
How to control soybean root maggots? All the control methods are here
Soybean root maggot, also called soybean root miner fly. It only harms soybean and wild soybean. The larvae bite and feed on the roots of soybean seedlings, forming maggot tunnels and excreting frass, causing root rot and stunted soybean plants; severely affected seedlings wither and die. This pest has only one generation per year. It overwinters as pupae in root bark tumors of soybean or in soil cracks; in mid-to-late May of the following year, it emerges as adults, lays eggs at the soybean roots, and hatches larvae that damage the soybean seedling roots. Control method: use seed dressing with chemicals to prevent larvae; dress seeds with 40% dimethoate emulsifiable concentrate at 0.7% of the seed weight, mix with water and spray, stirring while spraying. If dressing
-
What are the effective control methods for the soybean root miner fly
The soybean root miner fly Ophiomyia shibatsuji (kato), also known as the bean root snake miner fly, belongs to the order Diptera, family Agromyzidae. It is commonly called the soybean root maggot, bean root snake fly, root miner fly, etc. I. Distribution and damage. The soybean root miner fly is mainly distributed in the main soybean producing areas; in China it is found in the three northeastern provinces, Inner Mongolia, Hebei, Shandong and Shanxi, among which Heilongjiang, Jilin and Inner Mongolia are the most prominent. The soybean root miner fly mainly causes damage during the soybean seedling stage; its feeding habit is monophagous, attacking only soybean and wild soybean. The larvae bore into the soybean
-
Introduction to Prevention and Control Methods and Technical Key Points for Chicken Mites
Chicken mites are a common external parasite of chickens. Prevention and control: (1) Thoroughly disinfect the chicken coop. (2) Soak the affected chicken's feet in warm soapy water to soften the scabs, then remove the scabs, apply 20% sulfur ointment or 10% dimecron ointment or 2% carbolic acid ointment, and apply again after an interval of several days. Using 0.1% trichlorfon solution, first soak the affected chicken's feet in the solution for 4-5 minutes, scrape off the scabs, then scrub the affected area with a small brush.
-
What are the prevention and control methods for fascioliasis in cattle and sheep?
Fascioliasis in cattle and sheep is a relatively serious parasitic disease caused by Fasciola hepatica of the family Fasciolidae, genus Fasciola, parasitizing the liver bile ducts of cattle and sheep. This disease can cause acute and chronic hepatitis and cholangitis in cattle and sheep, accompanied by systemic poisoning and nutritional disturbances, leading to decreased production performance in cattle and sheep. In young livestock, it can cause mass death, bringing huge economic losses to the livestock industry. The development of Fasciola hepatica requires freshwater snails as intermediate hosts, so the disease mostly occurs in regional epidemics, with more severe epidemics in rainy seasons and flood-affected areas. I. Main symptoms
-
Prevention and Control Methods and Technical Key Points for Goose Influenza
This disease is a widespread acute, respiratory and septicemic infectious disease, occurring mainly in winter and spring. Goslings weighing around 500 g are most susceptible (adult geese are less commonly affected), and in severe cases the morbidity and mortality rates reach 80-90%. Sudden climate changes, excessive temperature differences in the goose house, long-distance transport and poor feeding management can all lead to the occurrence of this disease. The disease is transmitted mainly through the respiratory tract, and contaminated feed and drinking water can also spread it. 1. Symptoms The main feature of sick geese is difficulty breathing, with large amounts of serous discharge flowing from the nostrils
-
Rice Major Pests and Diseases in Gejiu City: Occurrence and Control Methods
I. Rice Planthoppers 1. Damage characteristics: Rice planthoppers, also known as white gnats, are migratory pests with the characteristics of long-distance migration and outbreak damage. The common species include the smaller brown planthopper and the white-backed planthopper. They occur in all rice-growing areas of the city, mainly damaging rice, followed by wheat and corn, and also parasitize grasses such as Chinese sprangletop and other gramineous weeds. Adults and nymphs gather in clusters at the base of rice clumps and on leaves to suck sap. The damaged parts show elongated brown spots, and in severe cases the lower stems turn black and the entire plant dies.
-
Occurrence Patterns and Control Methods of Potato Blackleg in Heilongjiang Province
Blackleg occurs to varying degrees in all potato-growing areas. The plant infection rate ranges from 2%-5% in mild cases to 40%-50% in severe cases, often causing missing plants, broken rows, and seed potato rot in the field. In recent years, the damage caused by this disease in our province has shown a trend of increasing year by year, greatly reducing the quality, yield, and marketable potato rate of potatoes. To effectively prevent this disease, it is necessary to accurately identify its symptoms, clearly understand the occurrence patterns, and master integrated control techniques. 1 Symptom Identification 1.1 Disease Symptoms Blackleg can occur throughout the entire growth period, mainly affecting stems and tubers.
-
Potato Disease Prevention and Control Methods and Key Technical Points
Disease is one of the important factors affecting the yield and seed quality of winter potatoes. The main diseases of winter potatoes in Yunnan Province and their prevention and control methods are introduced as follows: Virus disease prevention and control methods: select virus-resistant varieties and virus-free seed potatoes; pull out diseased plants in the field; control aphids in a timely manner. Fungal diseases: first, late blight. Prevention and control methods: select disease-resistant varieties and disease-free seed potatoes; promptly pull out central diseased plants and carry out intertillage and weeding; chemical control. Second, early blight. Prevention and control methods: select disease-resistant varieties; chemical control. Bacterial diseases: ring rot prevention and control methods: select
条件筛选