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What are the control methods for the white-spotted flower chafer?
The white-spotted flower chafer sporadically mainly damages corn, grapes, tomatoes and apples. I. Morphological characteristics and living habits of the white-spotted flower chafer. The adult is 17-24 mm long and 9-12 mm wide, oval-shaped, with a bronze luster, and its body surface is scattered with numerous irregular white downy spots. Only 1 generation occurs each year. It overwinters as larvae in soil or in compost made from rotted straw. It starts activity in March of the following year. In late April and early to mid-May it damages corn seeds and seedlings, adults appear in May, and June-August is the peak occurrence period. Adult white
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The Harm of Rotifers to Adult Fish and Control Methods
In recent years, while providing technical services, the author has found that rotifers are overrunning adult fish ponds in some areas, causing many problems for farmers. This phenomenon is especially serious in some long-established aquaculture areas or places using sewage for aquaculture, and it deserves sufficient attention. The harm of rotifers to adult fish The harm of rotifers to adult fish is mainly as follows: rotifers have an extremely strong reproductive rate and will form a dominant population in a short time, eating most of the algae, reducing photosynthesis and weakening oxygen production capacity. At the same time, they also consume a large amount of oxygen, and the result is very likely to cause fish oxygen
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What are the prevention and control methods for soft-shelled turtle red plastron disease?
Cause: Caused by Aeromonas punctata infection. Symptoms: Sick turtles respond slowly to external stimuli. The most obvious sign of the disease is that the entire plastron becomes red and swollen or appears in a red patch pattern, accompanied by ulceration and edema. Some turtles bleed from the mouth and nose. Necropsy shows severe liver lesions; some are black; some are mottled. The intestines show localized or entire-segment congestion and inflammation; some have fluid accumulation in the abdominal cavity. Prevention and control: 1) Control stocking density; 2) Improve the pond bottom substrate, and thoroughly clear the pond at the end of production;
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What are the prevention and control methods for swine epidemic encephalitis B
Swine epidemic encephalitis B is a zoonotic infectious disease caused by the Japanese encephalitis B virus. Mosquitoes are the long-term host and main transmitter of the virus, so the disease has an obvious seasonal pattern, occurring more frequently in summer and autumn when mosquitoes are active. The disease can infect pigs of different ages, sexes and breeds, at around 6 months after birth. It generally occurs sporadically, with many inapparent infections, but regardless of whether symptoms are present, infected pigs are contagious in the early stage of infection. After infection, pigs mostly develop sudden
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Control and Treatment Methods for Other Pig Diseases (1)
(1) Listeriosis in pigs. This disease is a zoonotic infectious disease caused by a Gram-positive Listeria bacterium that has no capsule and no spores. In pigs, it mainly presents with the characteristics of meningoencephalitis, septicemia and abortion. Symptoms: Most affected pigs (especially piglets) show septicemic symptoms, with body temperature rising to 42°C, depression, anorexia, rapid breathing, and cyanosis of the skin of the head, ears and abdomen. Gait is abnormal, with the hind legs splayed while sitting on the ground in a stargazing posture, or continuous circling, spasms, gradual paralysis of the hind legs, and after falling to the ground, paddling of the limbs, with death within 2-4 days; pregnant sows abort.
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Causes and Prevention and Control Methods of Duck Hemorrhagic Disease
Duck hemorrhagic disease is an infectious disease caused by a novel herpesvirus (Duck herpesvirus type II) that can infect ducks of all breeds and all ages. Because the feather shafts of both wings, the tip of the upper beak, and the tips of the claws and webbed feet of affected ducks often bleed and appear purplish-black, it is commonly known as duck "black feather disease," duck "black shaft disease," and duck "purple beak and black foot disease"; based on the characteristic necropsy lesions of the disease, it is also called duck hemorrhagic disease. At present, the disease occurs in several southern provinces of China, including Fujian, Guangdong, and Zhejiang, and affected duck flocks are prone to concurrent or secondary bacterial infectious diseases (such as duck infectious serositis
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Harm and Control Methods of Angelica Rust
The pathogen is Puccinia angelicae (P. angelicae). Urediniospores are oval to oblong-elliptical, yellowish-brown, (25-42) micrometers x (22-30) micrometers, with small spines on the surface and 3 germ pores. Teliospores are elliptical to club-shaped, chestnut-brown, (32-49) x (17-26) micrometers, with rounded ends and slightly constricted at the septum; the stalk is colorless and deciduous. Single-spored teliospores sometimes occur. 1. Damage symptoms: It damages leaves, and also damages petioles and fruit stalks. Uredinial pustules are scattered or clustered on the underside of leaves, exposed, brown. Telio
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How to prevent early bolting in Angelica sinensis? Detailed control methods
Angelica sinensis is native to high-cold mountain areas and is a low-temperature long-day plant. During its individual development, the transition from vegetative growth to reproductive growth requires passing through two developmental stages: the vernalization stage (requiring a low temperature of 0-5°C) and the photoperiod stage (requiring a long-day photoperiod of more than 12 hours). Therefore, artificial cultivation requires growing seedlings in the first year (raising seedlings), harvesting the roots for medicinal use in the second year, and collecting seeds from bolting, flowering and fruiting in the third year. However, in production practice, Angelica sinensis often bolts and flowers abundantly during June-July of the second year of cultivation, with the bolting rate in normal years ranging from 10-30%
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Identification and Control Methods of Diseases in the Seedling Stage of Panax notoginseng
Because Panax notoginseng grows year-round in a shaded and humid environment, diseases such as black spot, round spot, phytophthora blight, rust rot and powdery mildew occur and cause serious damage, with annual losses from various diseases reaching 30%-40%, and in severe cases over 80%. The stage of emergence and leaf growth, when the plant is tender, the root system is underdeveloped and stress resistance is poor, is an important period for initial infection by many pathogens. If spring rain comes early and frequently, the disease spreads rapidly and the damage and losses are severe. Panax notoginseng generally takes 60-75 days from sowing to emergence; strengthening
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What are the effective control methods for mushroom fungus maggots
There are many kinds of maggot-like larvae that damage mushroom fruiting bodies and mycelium, collectively known as "fungus maggots." The four more common ones are mushroom gnats, gall midges, mushroom flies, and dung flies. Their larvae--maggots--look roughly similar in morphology to the naked eye, and among the adults only the gnats and flies show obvious differences. The morphology and even the living habits of gall midges, mushroom flies, and dung flies are very similar, so they are often mistaken for just one species, all called "fungus flies." Fungus maggots (larvae) bore into and eat the fruiting bodies, turning the mushrooms into waste products, and some damage the mycelium. Bored into and eaten by fungus maggots
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