-
Symptom Identification and Control Methods of Carnation Rust
Rust is one of the common diseases of carnation, and susceptibility varies among cultivars. It generally occurs commonly in autumn and winter when control is neglected, and is severe in continuous cropping fields where the previous crop was heavily diseased. The whole plant can be affected, with leaves suffering the most severe damage. Reddish-brown spots appear on both the upper and lower surfaces of diseased leaves, and the epidermis around the diseased area ruptures, exposing red powdery material, which is the uredinium of the pathogen. In the later stage, the color of the diseased area deepens, and after the epidermis ruptures, dark brown to black powdery material appears, which is the telium of the pathogen. Rust can also damage the stems and sepals of carnation. Carnation rust is caused by the fungus Uromyces dianthi, and is a
-
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
-
Identification Methods and Correct Usage Techniques for Common Fish Medications
I. Antibacterial Agents (1) Furazolidone, also known as furaltadone. Yellow powder, odorless, with broad-spectrum antibacterial action and relatively low toxicity; can be administered orally or as a bath, mainly used to prevent and treat eel gill rot, enteritis, red fin disease, and red spot disease. For oral administration, mix 15-20 g of the drug per 100 kg of feed, for a course of 3-5 days; for bath treatment, scatter the drug solution over the entire pond at 2 g per cubic meter. Because the drug is poorly soluble in water, it can first be soaked and mixed with alcohol before use. (2) Chloramphenicol. White powdery drug, easily soluble in water, effective against both Gram-negative
-
Identification and Control Methods of the Russian Olive Psyllid
Scientific name Trioza magnisetosa Log. Homoptera, Psyllidae. Hosts: Russian olive (Elaeagnus angustifolia), jujube. Damage characteristics: adults and nymphs pierce and suck the sap of young buds, tender twigs and leaves; infested young buds often die, infested leaves mostly curl toward the underside, and in severe cases the twigs and shoot tips die, weakening the tree's vigor, with heavy flower and fruit drop. Morphological characteristics: adult body length 2.5-3.4 mm, dark green to yellowish brown. Compound eyes large, protruding, reddish brown. Antennae filiform, 10 segments, the terminal 2 segments black
-
Detailed Explanation of High-Yield Soybean Cultivation Technical Specifications
Soybean is a major oil crop in our province. Developing soybean production is of great significance for improving people's food composition, developing animal husbandry, and improving soil fertility through crop rotation. From the actual situation of our province, soybean production mainly relies on increasing per-unit yield to increase total output. To achieve the target of over 200 kg per mu, it is necessary to liberate soybean from corn fields, because intercropping and mixed cropping of soybean with corn is one of the reasons for the low per-unit yield of soybean in our province, so clean planting of entire fields should be promoted; second, actively promote high-yield cultivation techniques centered on equidistant sowing, with increased application of farmyard manure
-
Rice variety Huhan 15 passes national certification
Bred by the Shanghai Agrobiological Gene Center (), it recently passed certification by the National Crop Variety Approval Committee. It is an indica-type conventional upland rice. Grown as a single-season mid-season rice under upland conditions in the lower reaches of the Yangtze River, its average whole growth period is 121.1 days, 10.6 days later maturing than the control Zhonghan 3. It grows uniformly, with vigorous seedling growth, strong tillering ability, a compact plant type, erect leaves, and green culms at yellow ripeness. The effective panicle number is 200,000 panicles per mu, plant height is 103.0 cm, panicle length is 20.7 cm, total grains per panicle are 144.3, seed setting rate is 80.6%, and 1000-grain weight is
-
Detailed Introduction to the Classification and Common Varieties of Softshell Turtles
Introduction to the Classification and Common Varieties of Softshell Turtles With the improvement of people's living standards and the growth of market demand at home and abroad, softshell turtles have gradually moved from hotels, restaurants and eateries into ordinary households. As a nutritious food, softshell turtles' dietary therapy and medicinal therapy functions can meet the needs of consumers at different levels. Market demand has stimulated production, and China's softshell turtle farming industry has developed rapidly, with the scale of farming continuously expanding and output increasing accordingly. Large-scale farming urgently needs a large number of softshell turtle hatchlings. Due to the rapid development, the breeding of seedlings, the classification, distribution and basic biological research of softshell turtles, as well as hatchling cultivation, species identification and disease prevention in farming production, cannot adapt to the needs of production development. Aquaculture operators and merchants in our province have purchased many softshell turtle hatchlings through different channels from abroad, Taiwan, China and other provinces in the mainland. Because these hatchlings come from different sources, their seed stock quality is unclear and it is hard to tell the genuine from the fake. Some farmers and aquaculture operators have paid a lot of "tuition fees," causing losses of varying degrees to production. Therefore, studying the classification and common varieties of softshell turtles and breeding superior softshell turtle varieties with good germplasm are urgent issues that must be solved for the sustainable development of the softshell turtle farming industry.
-
Identification and Control Methods for Goji Berry Pests and Diseases
(1) Black fruit disease. The pathogen is a species of ascomycete fungus (scientific name Glomerella cingulata (Stonem) Sch. et Spauld). It is mainly prevalent in Hebei, Shandong, Shaanxi and other places, and mostly occurs during the rainy season. Affected fruits, flowers and buds turn black, and under humid conditions the diseased parts produce orange-red slime, which is the conidial mass of the pathogen. Control methods: ① Strengthen water and fertilizer management in winter and spring, prune lightly in autumn and winter to promote early ripening and higher yield of spring fruits; control
-
Symptom Identification and Control Methods of Hydrangea Viral Disease
Also known as hydrangea ringspot virus disease and hydrangea mosaic disease. Found sporadically in Beijing, Henan, Hebei and other places. It harms hydrangeas, making the plants short and small, with small and pale flowers, reducing their ornamental value. In some places, horticultural cultivation appreciates its diseased beauty, and it is called variegated-leaf hydrangea. Symptoms are a systemic disease; infected plants are thin and weak as a whole, with pale colors in branches, leaves and flower clusters, appearing pale green under a light pinkish-white covering; the leaves have irregular pinkish-white patches mixed into the pinkish-green, with clear boundaries separated by leaf veins; the leaf margins are white. In early spring and winter in the greenhouse
-
Symptom Identification and Control Methods for Hydrangea Bud Blight
Hydrangea bud blight is also known as hydrangea gray mold. It damages the buds and flowers of the plant. Symptoms: In field-grown plants, it easily occurs in dense spherical flower clusters, causing them to develop water-soaked rot. In greenhouse cultivation, buds are prone to turning black and withering. Pathogen: The pathogen is Botrytis cinerea Pers., belonging to the Deuteromycotina, Hyphomycetes, Moniliales, genus Botrytis. Disease pattern: The pathogen overwinters as mycelium in diseased plant debris. In the following spring, it produces conidia
条件筛选