-
A Detailed Explanation of the Occurrence Patterns and Control Methods of the Jujube Leafroller
The jujube leafroller belongs to the order Lepidoptera, family Tortricidae. Common names include leaf-tying worm, leaf-sticking worm, leafroller, and so on. It occurs and causes damage to varying degrees in most jujube-growing areas nationwide, and is one of the major pests of jujube trees. I. Damage characteristics: The jujube leafroller uses its larvae to spin silk and damage buds, leaves, flower buds, flowers, and fruits. Especially the third-generation larvae, which are in the fruit-coloring period, often glue jujube leaves and jujube fruits together with thin silk, and within this shelter gnaw at the jujube skin and flesh at the fruit stalk, causing a large number of fallen and rotten fruits. II. Life habits: In Shandong, He
-
What are the control methods for arrowhead leaf spot disease?
1. Symptoms This disease mainly damages leaves and leaf stalks. The leaf spots are yellowish-brown to brown, polygonal, elliptical or irregular in shape, slightly zonate, surrounded by a yellow-green or green-brown halo; the spots sometimes merge with one another into large lesions, and in severe cases the leaves turn yellow and wither. On leaf stalks, the disease often produces short, streak-like brown spots, and under high humidity a gray mold grows on the surface of the spots. 2. Transmission route and disease pattern This disease is caused by infection by the fungus Cercospora sagittariae of the subphylum Deuteromycotina. The pathogen mainly overwinters as mycelium and conidiomata on diseased plant residues
-
How to Grow Broadleaf Garlic? Detailed Explanation of Cultivation and Management Techniques
Plant name: Broadleaf Garlic Family: Liliaceae Variety (suitable for pot cultivation): Broadleaf Garlic Color: Light purple, purplish red General attributes - Region of origin: Central Asia - Bulb type/nutrient storage organ: Bulb - Variety habit *Height: 20cm *Flowering: Spherical, dozens of flowers *Flower shape: Star-shaped *Leaf color and shape: Blue-gray; oval - Requirements for breaking dormancy: Low temperature, 9°C
-
How to prevent and control hollow-heart leaf shrinkage disease in hot peppers? Growers should take preventive measures early
Hollow-heart leaf shrinkage in hot peppers may be caused by a viral disease. After pepper plants are infected by a virus, a variety of symptoms can appear, generally including mosaic, fern leaf, vein clearing, dwarfing, yellowing, necrosis, and top bud blight, among which the one that can cause hollow-heart leaf shrinkage in hot peppers is fern leaf virus disease. After the disease occurs, it can be prevented and controlled by the following methods: 1. 20% Virus A wettable powder at 500 times dilution; 2. Bingdujing or Bingduling at 500 times dilution; 3. 1.5% Zhibingling emulsifiable concentrate
-
Are triploid large-leaf black locust and large-leaf fast-growing locust the same variety?
1. The tetraploid large-leaf black locust is an excellent variety selected through years of dedicated research and experimental comparison from among several superior polyploid black locust clones introduced from abroad. The tetraploid large-leaf black locust is an artificially induced tetraploid plant, with the characteristics of fast growth, large leaves and high biomass. Its leaf width is more than 2 times that of the common black locust, and its compound leaf dry weight, single leaf dry weight and total leaf dry weight are each 1.5 times or more than those of the common black locust. Compared with the common black locust, the tetraploid large-leaf black locust has a denser crown, thicker branches and a stronger photosynthetic capacity.
-
Golden Locust is an excellent colored-leaf tree species
Robinia pseudoacacia 'Frisia', of the Fabaceae family, genus Robinia, is a broadleaf deciduous tree. The twigs are thorny, with pinnate compound leaves; the foliage is golden yellow in spring, turning yellow-green in summer and orange-yellow in autumn, with rich and extremely beautiful color changes. It blooms in early summer, with white flowers. Native to northern America, it loves sunlight, tolerates slight shade when young, and can adapt to acidic, calcareous and alkaline soils; it has a shallow root system, is not tolerant of waterlogging, and grows rapidly. It is suitable for growing in the Three-North region. It is suitable as a specimen landscape tree and
-
Why do spider plant leaf tips turn brown and black?
Why do the leaf tips of potted spider plants (Chlorophytum comosum) turn black, dry up and shrivel? How can this be prevented? When potted spider plants show withered, blackened leaf tips, from a cultivation standpoint there may be the following causes. First, dry air, overly intense sunlight and excessively high temperatures. This situation mainly occurs in summer and autumn, because spider plants like to grow in humid, semi-shaded environments; once the air is too dry, the sunlight is unobstructed, and on top of that the temperature rises above 30°C, it is very easy to cause the leaf
-
What to Do About Golden Privet Leaf Drop During the Growing Season? Causes and Control Methods
Causes and Control Measures for Leaf Drop of Golden Privet During the Growing Season Caused by Disease According to expert research, this leaf spot disease is caused by the pathogenic fungus Alternaria (afternaria) of the order Moniliales, class Hyphomycetes, subdivision Deuteromycotina. In the early stage, small brown spots appear on the leaves, surrounded by purplish-red halos, and black mold-like growth is visible on the spots.
-
How to prevent and control barley yellow leaf disease? Detailed explanation of occurrence and control measures
In recent years, barley yellow leaf disease has become increasingly serious in the northern Jiangsu region, often leading to reduced yield and quality, and in some areas even severe seedling death, forcing plowing and replanting. From 1992 to 1995, the author conducted organized surveys of 1466.7-1866.7 hectares of two-row barley planted in the coastal reclamation area of northern Jiangsu and carried out trials of planting disease-resistant varieties, analyzing the relationship between the occurrence and spread of yellow leaf disease and factors such as variety, sowing date, tillage and cultivation, and climate. The report is as follows: 1 Main factors affecting the occurrence of barley yellow leaf disease
-
Control Methods and Technical Key Points for the Tea Green Leafhopper (Empoasca flavescens)
The tea green leafhopper, also known as the small green leafhopper, is one of the most important insect pests of tea in Fujian Province. It mainly feeds by piercing and sucking the sap of tender tea shoots with adults and nymphs, and female adults lay eggs inside the stems of tender shoots, causing stunted growth of tea plants. The damaged buds and leaves curl and harden, and the leaf tips and margins become reddish-brown and scorched, affecting the yield and quality of tea. This pest has multiple generations per year in Fujian Province, with overlapping generations. In low-mountain tea areas, it has 12 to 13 generations per year, with peak damage periods in May to June and September to October; in high-mountain tea areas, it has 8
条件筛选