-
Occurrence Patterns and Control Methods of the Rice Water Weevil
The rice water weevil is an internationally recognized agricultural plant quarantine pest. It first occurred in the Americas, and the countries in Asia where it occurs include Japan, South Korea, North Korea, and others. The place where the rice water weevil was first discovered in China was Tanghai County, Hebei Province, in 1987. The area where the rice water weevil was first discovered in our province was Ji'an City in the Tonghua region in August 1993. At present, this pest occurs to varying degrees in most areas of Heilongjiang Province. I. Degree of damage caused by the rice water weevil. The rice water weevil mainly damages rice, and also damages some
-
Occurrence Patterns and Control Methods of the Rice Water Weevil
The rice water weevil is an internationally recognized quarantine pest of agricultural plants. It first occurred in the Americas. In Asia, the countries where it occurs include Japan, South Korea, North Korea, and others. The place where the rice water weevil was first discovered in China was in 1987 in Tanghai County, Hebei Province. The area where the rice water weevil was first discovered in our province was in August 1993 in Ji'an City in the Tonghua region. At present, most areas of our province have this pest to varying degrees. I. Damage level of the rice water weevil. The rice water weevil mainly damages rice and also damages some grass
-
Occurrence Patterns and Control Methods of Silkworm Muscardine
Silkworm muscardine, also known as hardening disease, is a silkworm disease caused by fungal parasitism. The bodies of diseased silkworms dry out and harden, with mycelium and conidia growing on the body surface. Because the bodies of diseased silkworms produce spores of different colors on the outside, the disease can be divided into white muscardine, green muscardine, yellow muscardine, gray muscardine and brown muscardine, among which white muscardine is the most common. There are two routes of infection: contact infection and wound infection. In both cases, pathogen spores attach to the surface of the silkworm body through media such as air and mulberry leaves, then penetrate into the silkworm body and parasitize it. If not controlled in time, it spreads very quickly and the mortality rate is relatively high.
-
Occurrence Patterns and Control Methods of Jujube Fruit Shrink Disease
Jujube fruit shrink disease, also known as black rot, is a new disease of jujube trees. When this disease breaks out severely, it has a serious impact on both the quality and yield of jujube fruit. 1. Symptoms: The disease mainly damages the fruit, causing fruit rot and premature fruit drop. Affected fruit first develop a pale yellow halo on the shoulder or body, which gradually expands into sunken, irregular pale yellow lesions; then the peel becomes water-soaked and infiltrated, with scattered needle-like round brown dots, the flesh turns earthy yellow, loose and soft, and the diseased tissue becomes spongy and necrotic, while the outer peel turns dark red and lusterless. Diseased fruit
-
Detailed Explanation of the Occurrence Patterns and Control Techniques of the Jujube Leafroller
The jujube leafroller belongs to the family Tortricidae, order Lepidoptera. The jujube leafroller damages the leaves, flowers, and fruits of jujube trees, seriously affecting the yield and quality of jujube. The jujube leafroller has a single feeding habit, only damaging jujube trees and wild sour jujube, with larvae feeding on jujube leaves, flowers, and fruits. It produces 3 generations per year, overwintering as pupae in cocoons under old cracked bark and in clods of soil around the trunk. In the following year, eclosion begins in late March, with the peak of eclosion in early April; adults are strongly phototactic, and eggs are laid singly on smooth twigs and leaves. The first-generation larvae hatch in early May (before the Beginning of Summer)
-
Occurrence Patterns and Control Methods of Cotton Red Leaf and Stem Blight
Disease symptoms and occurrence patterns: Cotton red leaf and stem blight is an explosive disease that frequently occurs in the middle and late stages of cotton growth. It can cause leaves to turn red from bottom to top until they drop off. The leaf veins remain green, the leaf mesophyll turns red, and the leaves become thicker, brittle, and wilted before finally dropping. When the stem is cut open, it does not change color, which distinguishes it from cotton Fusarium and Verticillium wilt. Generally, in old cotton-growing areas, the disease is more severe in cotton fields with continuous cropping year after year, sandy soil, too shallow a plow layer, or insufficient fertilizer lacking potassium fertilizer. Drought in the middle and late stages, along with severe potassium and zinc deficiency in the soil, can also easily accelerate the occurrence of this disease.
-
What Are the Patterns of Estrus in Female Foxes? A Detailed Explanation
During the resting period, the vulva of a female fox is covered by pubic hair, making it hard to detect; during estrus, the pubic hair parts only because the vulva becomes swollen. The estrus period of female foxes is short, mating is relatively difficult, and the optimal timing for mating is also hard to determine; in particular, silver-black foxes have a relatively high rate of failed conception. To improve the reproduction rate, it is necessary to understand the estrus patterns of female foxes and mate or perform artificial insemination at the right time. The estrus period of female foxes can be divided into three stages: Stage one: the vulva begins to swell, the clitoris enlarges, and the female begins to show signs of attraction to males and sexual excitement; this generally lasts
-
Occurrence Patterns and Control Techniques of Sweet (Hot) Pepper Viral Disease
Viral disease is a major disease in the production of sweet (hot) peppers. Early onset affects the normal growth of plants, forming a "little old man" appearance; late onset causes mosaic leaves and mottled fruit, affecting photosynthesis and marketability, often causing significant economic losses. To help farmers solve this problem, Tunliu County, through 3 years of research and experimental demonstrations, has preliminarily explored some effective integrated control measures. The details are as follows: I. Symptoms: The main symptoms are mosaic, malformation and clustering, and necrotic streak, 3 types. Mosaic: diseased leaves
-
Occurrence Patterns and Control Methods of Viral Diseases in Solanaceous Crops
In the southern Guangxi region, the winter climate is warm with no obvious frost, making it a great place for growing winter vegetables to be shipped from the south to the north. Therefore, after harvesting the late rice, farmers grow winter vegetables to supply the market after the Spring Festival, achieving relatively high economic returns and writing a new chapter of "the plan for the year lies in autumn and winter." This has become another way for local farmers to get rich and move toward a moderately prosperous life. Among the many vegetable varieties grown, solanaceous vegetables (tomato, pepper, eggplant) are favored by local farmers for their unique planting advantages. According to statistics, the perennial planting area is around 80,000 mu, and the planting area is predicted to keep rising year by year.
-
A Detailed Explanation of the Occurrence Patterns and Control Methods of the Jujube Leafroller
The jujube leafroller, also known as the jujube sickle-winged tortrix moth, commonly called the leaf-sticking worm, is one of the important pests of jujube trees. The larvae spin silk to roll leaves for feeding, rolling leaves longitudinally into a dumpling shape, or using silk to bind several leaves together. The larvae also bore into and feed on fruit attached to leaves, greatly affecting yield. 1. Occurrence patterns This pest has 3 generations per year, overwintering as pupae in rough bark crevices on branches and trunks. Adults hide by day and emerge at night, are strongly phototactic, and lay eggs 1 to 2 days after emergence; eggs are mostly scattered on smooth small branches and jujube spurs. The egg stage lasts 10 to 25 days, and the first-generation larvae occur
条件筛选