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What are the control methods for the soybean root miner fly?
The soybean root miner fly belongs to the order Diptera, family Agromyzidae. Also known as the soybean root maggot, soybean root miner fly, etc., this insect is a monophagous pest that only damages soybean and wild soybean. It is distributed in Heilongjiang, Liaoning, Inner Mongolia, Shandong and Hebei, among other places. Damaged plants can suffer yield losses of more than 40% per plant compared with healthy plants. 1. Morphological characteristics (1) The adult is about 3 mm long, glossy black, with wings that are light purple with a metallic sheen. The compound eyes are bright red. (2) The egg is about 0.015 mm long and about 0.04 mm wide, kidney-shaped, white and translucent.
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Symptoms, Identification, and Control Methods of Pinellia ternata Root Rot
It mostly occurs in hot and humid seasons; the underground tubers rot, and the above-ground parts turn yellow, wilt, fall over, and die. Control methods: (1) Pay attention to drainage after rain. (2) In the early stage of the disease, drench the planting holes with 5% lime milk. (3) Control underground pests.
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Comprehensive control methods for soybean root-knot nematode disease
Soybean root-knot nematode disease, also known as "Fire Dragon Seedling," is a whole-plant disease caused by nematodes attacking soybean roots, leading to bacterial infection and disease. Affected plants grow slowly, with short, small, and yellowing stems and leaves, delayed flowering, few and small pods, and shriveled seeds; in severe cases, no pods form, or even the entire plant dies. Soybean root-knot nematode disease spreads rapidly, and the pathogenic nematodes can survive in the soil for a long time. Once the disease occurs, it is very difficult to eradicate completely, so comprehensive control measures must be adopted: 1. Select and sow disease-resistant varieties; 2. Control the source of infection
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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
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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
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Why soybean root cutting and pinching can increase yield
1. High-yield cultivation method for soybean by root cutting and pinching: Direct sow soybeans with a row spacing of 50 cm. On the 8th to 9th day after sowing, carry out pinching; on the 10th to 11th day, carry out root cutting. When cutting roots, use a thin iron shovel to cut the main root at a depth of about 5 cm below the soybean seedling. Insert the shovel at an angle and pull it out from the same position to avoid displacing the soybean seedling and damaging the lateral roots. The root cutting position should be controlled at about 2.5 cm below the soybean seedling stem. Too deep or too shallow will fail to achieve the expected purpose and may even cause seedling death. 2. Several issues to note 1. Density: Soybean density should be determined according to the variety and cultivation conditions,
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Introduction to the Root Characteristics and Structure of Soybean
The root system of soybean is a taproot system. It is divided into a main root and lateral roots, and both the main root and the lateral roots are densely covered with root hairs. The main part of the root lies 5-20 cm deep in the soil, and the whole root system is roughly bell-shaped. On soybean roots, rhizobia live in symbiosis with the soybean. When the soybean germinates, the rhizobia invade the root, and when the soybean grows its first compound leaf, root nodules have formed on the soybean roots, first on the main root and then gradually spreading to the lateral roots. The root nodules are produced through the action of rod-shaped rhizobia that have 1-2 flagella at one end. They are aerobic bacteria, mainly growing on the root system near the soil surface
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Symptoms, Identification, and Control Methods of Root Rot in Dianthus
Identification points: Dianthus root rot mainly affects the root system. After the plant is infected, its growth becomes weak, there are very few fibrous roots on the diseased plant, and the leaves wilt. In severe cases, the root system turns entirely brown, rots, and the root cortex peels off easily, and the whole plant withers. Occurrence characteristics: The pathogen belongs to the Pythium group. This fungus survives on plant residues in the soil and is an important soil-borne fungus that can harm many kinds of plants, causing Pythium root rot. The disease is severe when the soil or growing medium is slightly alkaline and humidity is high. Under conditions such as being placed too densely, excessive watering, and poor ventilation, it is also prone to
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How are potato roots distributed? Understand it in one article
The roots of potatoes grown from tubers are fibrous roots, with no taproot; potatoes grown from seed have a primary root and lateral roots, and here we mainly discuss the fibrous root system. Potatoes are a shallow-rooted crop, with most of the root system distributed within 40 cm below the soil surface, generally not exceeding 70 cm, and in sandy soil the roots can reach more than 1 m deep. The root system of early-maturing varieties is generally less developed than that of late-maturing varieties, and early-maturing varieties have a shallower root distribution, while late-maturing varieties have a wide and deep distribution.
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Occurrence and Control Methods of Root Rot in the Medicinal Plant Licorice
Symptoms The disease mainly affects the rhizome and roots. After infection, the stems and leaves of the aboveground part gradually turn yellow and wither, and the rhizome becomes yellow-brown to dark brown, sunken and rotten. The pathogen Fusarium sp. is a species of Fusarium, belonging to the Deuteromycotina fungi. For the morphological characteristics of the pathogen, transmission routes, disease conditions, and control methods, see Astragalus Root Rot.
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