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What are the effective control methods for the black scarab beetle?
The black scarab beetle is known locally as "tiewoyang" (iron nest seedling). In Wuhe Township, Tengchong County, it is one of the main pests harming crops, with particularly severe damage to sugarcane and dry-raised rice seedlings. It mainly bites the stem base of sugarcane seedlings and rice seedlings, causing the entire plant to die and having a huge impact on sugarcane and rice. The insect's living habits are: during the day it burrows into the soil to rest, and in the evening and at night it comes out to be active, mostly causing clustered damage with a fierce onset, and the harm to sugarcane and dry-raised seedlings is quite serious. For control, the first method is to use irrigation water to make the scarab beetles float to the surface of the water for manual
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What to Do About Continuous Garlic Cropping? Detailed Explanation of Prevention and Control Methods
Question: Because garlic has been planted for many years, the garlic in the field now gets sick every year, and the bulbs get smaller year after year. Changing the seed garlic does not help. Is it a problem with the soil? What should be done? Answer: When garlic is continuously cropped for many years, various soil-borne diseases and root maggots worsen year by year, which can easily lead to garlic disease and poor growth. For the above fields, it is best to practice paddy-upland rotation of garlic with rice, or rotate garlic with non-garlic upland crops for more than 3 years.
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Analysis of Garlic Diseases in Jinxiang and Detailed Explanation of Prevention and Control Methods
Editor's Note: Jinxiang in Shandong is the most important garlic-producing area in China, and in recent years several diseases have been plaguing garlic farmers. Although some newspapers have also reported analyses by many people, many of them are ambiguous and leave readers confused. Recently, this newspaper specially invited Mr. Song Yuanlin, a vegetable expert from the Shandong Academy of Agricultural Sciences, to conduct a survey and gather information among garlic farmers. The findings and preliminary conclusions are now made public as follows. Secondary growth of garlic and the hollow garlic phenomenon: In spring, when garlic grows to a certain stage, the scale buds begin to differentiate, the leaves degenerate
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What are the control methods for the pear bicolor aphid pest?
This insect, commonly known as the pear aphid, is a major pest of pear trees and is found in all pear-growing regions. After pear trees are infested, large numbers of leaves curl up, causing early defoliation, weakening of tree vigor, and impaired fruit development, seriously affecting yield and quality. [Occurrence pattern] About 10 or more generations occur per year. Overwintering eggs generally hatch in March and late March when pear buds swell and open. After the young aphids grow, they continuously give live birth to new young aphids. By late April, winged aphids begin to appear. During May, winged aphids form in large numbers and migrate to weeds to reproduce and cause damage. In October, winged aphids migrate back to pear trees
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What are the control methods for lily blight?
Symptoms: The entire plant (including flowers, leaves, stems, stem base, bulbs, and roots) can be affected. Infected flowers wither and fade, with white mold growing on them; leaves initially show water-soaked spots, then wither; stem and stem base tissues initially show water-soaked spots, then turn brown, necrose, and constrict, with all parts above the infected area completely withering. Bulbs turn brown and necrose. Roots turn brown and rot. Pathogen: The pathogen is Phytophthora parasitica Dast, a fungus of the genus Phytophthora in the phylum Mastigomycotina.
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Symptom Identification and Control Methods of Lily Blight
Blight is an important disease of lilies, widely distributed, occurring mostly in the south, with occasional outbreaks in protected cultivation in the north. Usually 5%-10% of plants are diseased, affecting lily production to a certain extent; in severe cases it can reach over 30%, causing plants to die in patches and significantly affecting lily yield and quality. Symptoms: This disease can infect all parts of the lily. When the stem is infected, it initially shows water-soaked light brown to greenish-brown rot, gradually spreading upward and downward, causing the plant to wither and die or topple. When leaves are infected, small water-soaked spots initially appear, later developing into grayish-green to dark green large spots, ultimately causing
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Lily Leaf Blight: Control Methods and Key Technical Points
Symptoms: Circular or oval lesions form on the leaves, varying in size, with a length of 2 to 10 mm or more. They range from pale yellow to light brown. In some varieties, the spots are light brown, surrounded by a distinct reddish-purple margin, and under humid conditions the spots quickly become covered with a layer of gray mold. When dry, the lesions become thin, easily crumble, are transparent, and generally appear grayish-white. In severe cases, the entire leaf dies. When the stem is infected, it rots and breaks at the point of infection, and the buds turn brown and rot. Spots on the flowers are brown and, when moist, quickly become a sticky mass covered with a gray
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Occurrence Patterns and Control Methods of Lily Leaf Blight
Lilies originate from the eastern and central regions of China. They are relatively cold-tolerant, prefer strong light, and do not tolerate shade. Insufficient light will affect growth and flowering. A well-drained sandy loam rich in organic matter is suitable. Their disease resistance is poor, and they are susceptible to disease under high temperature and high humidity conditions. Lily plants are upright and elegant, with large, brightly colored flowers and many varieties. They are suitable for planting in patches or clumps at the edges of lawns or for forming flower borders, creating a quiet and harmonious effect. Lilies are also treasures for potted flowers and cut flowers. Lily leaf blight, also known as lily gray mold, affects the plant's photosynthesis, hinders growth, and reduces ornamental value. When the disease occurs severely,
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What are the control methods for lily aphids?
They appear in early summer, sucking the sap of tender stems and leaves, causing the plants to wither at the top, affecting growth, and spreading diseases. Control methods: ① Eliminate overwintering sources of the insects, clear away nearby weeds, and carry out thorough field cleaning. ② Spray with a 40% dimethoate 1000-fold solution to kill them.
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Symptoms and Control Methods of Bacterial Leaf Spot in Lilies
Bacterial leaf spot is an important disease of lilies, occurring and distributed in certain regions, and can develop both under protected cultivation and in open fields. Typically 5%-10% of plants are affected, impacting yield and quality to some extent. In severely affected plots, the field incidence rate can reach over 20%, significantly affecting lily production. [Symptoms] This disease can affect all parts of the lily, with symptoms mostly appearing on above-ground parts. Initially, densely packed water-soaked greenish-brown nearly oval small spots appear on the leaves, which later develop into nearly spindle-shaped yellowish-brown to dark brown necrotic lesions, slightly sunken, with water-soaked edges
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