-
How to Prevent Cold Damage in Rice? Detailed Explanation of Fertilization Measures
Fertilization case: In 2006, in rice-growing areas such as Shangzhi City, Heilongjiang Province, during the early stage of rice growth, some rice seedlings encountered low-temperature weather below 17°C, and rice cold damage problems of varying degrees occurred. In the rice-growing areas of Ningxia and Zhangjiakou, Hebei in the northwest region, in autumn during the late stage of rice growth, just at the grain-filling stage, the temperature suddenly dropped below 20°C, causing rice to suffer cold damage, which was very unfavorable for grain filling, and the seed-setting rate decreased by 10-20%, with severe cases decreasing by more than 50%. Expert comments: In northern rice-growing areas, in order to defend against the cold damage problems brought to rice production by low-temperature weather
-
What damage does tea blister blight cause to the growth of tea plants
Tea blister blight, also known as blister-like leaf blight and leaf gall disease, is an important disease of young buds and leaves. It is distributed in all tea-growing regions across the country and mainly damages tender leaves, tender stems, new shoots, flower buds, fruits and leaf stalks. When tender leaves are infected, small translucent spots appear at first, pale yellow to reddish brown, then expand into round spots with a diameter of 0.3-1.25 cm. The front of the lesion is sunken, pale yellowish brown to dark red, and the back is raised, forming steamed-bun-shaped blister spots, on which there is grayish white, pink or gray powdery material. Later the powder disappears, and the raised part shrinks to form brown dead spots, with a
-
How can Gastrodia elata in the Changbai Mountains of Jilin be protected from frost damage in years with little snow?
Wild Gastrodia elata in the Changbai Mountains of Jilin is mostly distributed in high-mountain broad-leaved mixed forests at an altitude of 500-2500 m with cool and humid summers, deep winter snow cover, high ground coverage, a thick layer of fallen branches and leaves, a relatively shallow frozen layer, and loose soil. Wild Gastrodia elata suffers frost damage in winters with little snowfall and a thick frozen layer, and cultivated Gastrodia elata also suffers frost damage when cold-protection measures are inadequate. In both 1981 and 1982, heavy snow sealed the ground, with winter snow 80 cm thick; when the snow was broken open, the frozen layer on the ground was found to be only 3 cm, so neither wild nor cultivated
-
How to control mite damage in oyster mushroom cultivation in spring
Oyster mushroom is a popular edible fungus with a broad consumer base, high biological efficiency and good economic returns, so its cultivation area is relatively large. However, the raw materials used for spring cultivation of oyster mushrooms are generally left over from last year and often carry mites. As temperatures gradually rise, conditions become suitable for mite growth and reproduction, and they multiply quickly. They mainly feed on oyster mushroom mycelium and fruiting bodies, causing reduced yields and, in severe cases, total crop failure. 1. Distribution, morphology and biological characteristics of Acarus siro and Tyrophagus putrescentiae 1. Acarus siro (1) Distribution and damage:
-
What are the remedial measures for pesticide damage in cotton
1. Washing. Most chemical agents are not resistant to water washing. If improper application is found, a sprayer can be immediately filled with clean water and sprayed repeatedly over the stems and leaves to wash away the pesticide remaining on the surface of the cotton plants and reduce the damage; when washing, the sprayer pressure should be sufficient and the amount of water sprayed should be large. For cotton fields where soil application was used and for damage caused by some herbicides, irrigation can be applied immediately to wash the soil, leaching the residual pesticide into the deeper soil layers. 2. Fertilizer supplementation. Generally, for damage with symptoms such as leaf spots, scorched leaf margins, and plant yellowing, applying additional fertilizer or foliar spraying
-
Control Methods and Rescue Measures for the Three Major Types of Pesticide Damage in Cotton
1. Strict operation and effective prevention. When using the various types of pesticides mentioned above on cotton, the operating procedures must be strictly followed and the pesticides used rationally (including the type, concentration, method and timing of application, etc.), so as to give full play to the pesticide's efficacy while reducing costs and preventing pesticide damage. 2. Timely "rescue" to eliminate the "danger". After pesticide damage occurs, a large amount of water can be sprayed on the leaves to wash it off; in the soil, irrigation, drainage to wash out the pesticide, or neutralization and detoxification with safeners can be used. If Bordeaux mixture is mistakenly used, since copper ions cause the pesticide damage, 0.5%-1% lime milk can be sprayed; spray equipment that has been used for
-
Morphological Characteristics and Damage of the Jujube Carpenter Moth
The jujube leopard carpenter moth belongs to the order Lepidoptera, family Zeuzeridae. It is also called the trunk-cutting worm. The adult has a body length of 18-22 mm, a white head, a grayish-white thorax and abdomen, filiform antennae, and 6 blue spots on the back of the thorax arranged in 2 longitudinal rows. The forewings are scattered with irregular blue spots of varying sizes, while the area before the submedian fold of the hindwings is covered with narrow blackish-blue transverse bands, and the marginal spots of the wings are darker in color. The back of each abdominal segment has 3 black longitudinal spots and one round spot on each side. The eggs are spherical, pale yellow when newly laid, and densely covered with reticulate sculpturing. The larva has a body length of 30-40 mm, a yellowish-brown head, a purplish-red trunk, and a black pronotum
-
What are the damage characteristics and living habits of the jujube leaf mite?
The jujube leaf mite is commonly known as gray leaf disease, fog disease, fire dragon, etc. It damages the leaves, flowers, and fruits of jujube trees as adults and nymphs. The damaged leaves turn grayish-white, the mesophyll thickens and becomes brittle; in severe cases, the leaf epidermal cells necrose, losing photosynthetic capacity, and the leaves curl and drop easily. Damaged flower calyces cannot bloom. The jujube leaf mite produces more than 3 generations per year, overwintering as adults or nymphs within the bud scales of jujube spurs. This pest has three damage peaks per year, namely late April, late June, and mid-July, each lasting 10-15 days. It begins in early August
-
A Detailed Explanation of the Damage Characteristics and Control Methods of the Jujube Geometer Moth
I. What Are the Damage Characteristics and Living Habits of the Jujube Geometer Moth? The jujube geometer moth, also known as the bow-waisted worm, the top-door eater, or the jujube looper. When the larvae crawl, they stretch and contract, hence the name "jujube looper." It is one of the most important insect pests of jujube trees. It is distributed throughout all major jujube-growing regions in China, with the most severe damage occurring in the jujube regions of Hebei, Shandong, Henan and Shanxi provinces. Its larvae are highly voracious, damaging all green tissues of jujube trees, including tender buds, leaves, flower buds, bearing shoots and new branch tips. In severe outbreaks, they can eat all the jujube leaves or buds bare, causing
-
Remedial measures for Schisandra chinensis after herbicide damage
A farmer friend called 12316 anxiously and said: "The Schisandra chinensis I planted has suffered herbicide damage, what should I do?" The expert answered: If foliar fertilizer is applied before the damage occurs, it can have a certain preventive effect; if the damage has already occurred, applying foliar fertilizer can only prevent the damage from developing further, but the parts that have already been damaged cannot recover. Applying foliar fertilizer now can slow down the damage, but full recovery will be very difficult. Apply foliar fertilizer quickly to control the damage.
条件筛选