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What are the control methods for the tea white scale (Pseudaulacaspis pentagona)?
The tea white scale belongs to the order Homoptera, family Diaspididae. It is distributed in most tea-producing provinces across the country and is an important tea tree pest in East China and Southwest China. Besides damaging tea, it also harms various plants such as citrus, pear, and apple. It damages tea trees by nymphs and female adults parasitizing on branches and trunks and sucking sap. Affected tea trees sprout sparsely, decline in vigor, age prematurely, and in severe cases shed a large number of leaves or even die. Morphological characteristics: the female's scale cover is grayish-white, about 1.5 mm long, narrow and slightly curved like a bent eggplant, slightly wider at the rear end and with a brown scale point at the front end.
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How to control the citrus black scale in orange orchards? The pure yellow aphelinid wasp comes to the rescue
[Morphological characteristics] Female wasp body length 0.92-1.18 mm, yellow, without color spots. The posterior margin of the scutellum has dark brown stripes. The base of the forewing has short black stripes; the ventral side of the antennal scape is dark brown, and the remaining segments are deep fuscous. Legs yellow. Compound eyes with fine hairs. Thoracic hairs thick and black; the scutellum bears 4 hairs; the forewing is 2.25 times as long as wide; the ovipositor is 1.9-2.01 times the length of the middle tibia. Male wasp body length 0.71-0.92 mm; the forewing is wider than that of the female, 2.2-2.33 times as long as wide. Important differences from Aphytis chrysomphali: the pure yellow aphelinid wasp of the citrus black scale is a bisexual species, and the propodeum is shorter, 0.75-0.8 times the length of the scutellum. The fan-shaped projections are large and elongated. Strongly overlapping; the thorax and venter of the mature pupa are dark brown, with only the abdominal tip lighter in color. Aphytis chrysomphali is a unisexual species, with males rarely seen in nature; the propodeum is longer, equal to or slightly longer than the scutellum. The posterior margin is broadly arched; the fan-shaped projections are small, rounded, and not overlapping. The mature pupa is yellow, with only a single black longitudinal line on the mesothoracic ventrite.
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What are the control methods for the peach globular scale?
In recent years, the peach globular scale has occurred severely in the nectarine orchards of our town. In mild cases, tree vigor weakened and yields declined; in severe cases, there was total crop loss and even tree death. To address this, we carried out two consecutive years of pesticide screening and control, with very good results. We summarize them as follows: 1. Strengthen comprehensive fertilizer and water management measures, keep the trees vigorous, ensure ventilation and light penetration, and pay attention to protecting natural enemies. 2. Before bud break, in early to mid-March, when overwintering nymphs emerge from dormancy, their body surface wax is still sparse, so timely control can achieve good results. Choose 5-degree lime sulfur
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Detailed Explanation of Large-Scale Cultivation Techniques for Belgian Azaleas
Although the Belgian azalea was introduced from Europe, it has a strong Chinese "bloodline." From 1838 to 1939, Robert Fortune and other British and American botanists came to our country several times, bringing early-flowering azalea varieties such as the Jiangnan azalea into Europe, where they were crossed with East Asian azaleas, peony azaleas, hairy white azaleas and other varieties, producing many excellent cultivar groups. Because the breeding center at that time was located in Ghent, Belgium, this azalea group is customarily called "Belgian azalea." After being introduced into our country
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How to control the San Jose scale? Control methods and technical key points
(1) Quarantine control. Inspect nursery stock, scions and fruit to prevent spread. (2) Manual and agricultural cultivation control. In combination with scraping bark in winter and spring, brush off and destroy the overwintering generation on branches; also carry out comprehensive control in nearby apple, pear and other orchards to prevent spread by wind and large insects, and pay attention to pruning out infested branches. (3) Protect and make good use of natural enemy resources. Where conditions permit, jujube orchards can rear and release natural enemies artificially. The main natural enemies include: Chilocorus rubidus, Chilocorus kuwanae, encyrtid wasps and birds.
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The fine-scaled xenocypris is a small food fish with relatively high economic value.
The fine-scaled xenocypris is commonly known as shaguzi, huangpian, huangpi, huangweidiaozi, and so on. It is the largest individual in the subfamily Xenocyprinae, and is a small to medium-sized food fish widely distributed in the rivers and lakes of China. It has a high proportion of flesh, and the meat is delicious and tender. According to measurements, the viscera account for only 8%-12% of body weight, the protein content accounts for 22%, and the fat content accounts for about 2%. It is easy and simple to raise, with a wide range of food sources, mainly feeding on natural food organisms. From the perspective of human consumption, it is a green, high-quality fish species with relatively high economic value.
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What kind of fish is the scaled loach? Let's get to know this fish species
Common name: Scaled loach. Origin and season: Distributed in Thailand and the Lancang River system of China. Description: The anterior and posterior nostrils are closely adjacent. The cheeks bulge outward. The mouth opening is broad and arc-shaped. The upper and lower lips are thick, with no obvious wrinkles on the lip surface, and there is a deep notch in the center of the lower lip. The maxillary odontoid process is relatively well developed. The inner side of the first gill arch has 9-10 gill rakers. The base of the pelvic fin originates opposite to or slightly behind the origin of the dorsal fin. The sides of the body have no markings or indistinct vertical bars. A bottom-dwelling fish, living in river tributaries with gravel substrates; individuals are relatively large and it has certain economic
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What are the disease prevention and control methods for large-scale chicken farms?
Scientific management practices and a strict disease prevention system are the foundation for controlling the occurrence of various infectious diseases. In terms of management, an all-in-all-out system should be adopted, with brooding chickens, growing chickens, and laying hens raised in separate zones. Manure should be concentrated in a manure yard far from the chicken houses, with dedicated personnel, vehicles, and roads assigned. It is strictly forbidden for poultry keepers to cross-contaminate with the manure yard or manure removal personnel. Chicken manure should be removed the same day and transported out of the farm area the same day, strictly controlling pollution caused by chicken manure. At the same time, daily environmental cleaning and disinfection of the chicken farm and disinfection of chicken houses with chickens inside should be maintained. Poultry keepers and management personnel adopt
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Large-scale propagation of the new high-quality wheat variety Emai 18 succeeds in Hubei
The new wheat variety "Emai 18", which combines high quality and special purpose, high yield, multi-resistance and early maturity, has been successfully propagated on a large scale in Hubei. This variety fills the gap of the absence of medium-gluten wheat in the middle and lower reaches of the Yangtze River, and won the first prize of the Hubei Provincial Science and Technology Progress Award in 2005. According to Li Meifang, a researcher at the Hubei Academy of Agricultural Sciences who bred "Emai 18", "Emai 18" is Hubei's first wheat variety to organically combine four major target traits: high quality and special purpose (reaching the national medium-gluten standard for special-purpose wheat varieties), high yield (yield increase of 8.75%), multi-resistance (moderate resistance to stripe rust and powdery mildew), and early maturity (
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What are the new perspectives on disease prevention in large-scale rabbit farms? Worth reading
Play down treatment and optimize the rabbit herd. Traditional rabbit farming emphasizes treatment over prevention, often turning a rabbit farm into a sanatorium for sick rabbits. To change this situation, some experts have proposed the "five no-treatment" rule for sick rabbits: do not treat rabbits that cannot be cured, do not treat rabbits whose treatment cost is high, do not treat rabbits whose treatment is time-consuming and labor-intensive, do not treat rabbits whose economic value after recovery is not high, and do not treat rabbits that are highly contagious and harmful. Practice has proved that after rabbit farms implemented this system, the health status of the rabbit herd improved markedly, virulent infectious diseases were effectively controlled, and medical costs
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