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Detailed Explanation of Garlic Seed Selection and Purification-Rejuvenation Techniques
Because garlic reproduces asexually, and the garlic clove is a modified lateral bud that forms part of the mother plant, long-term asexual reproduction inevitably leads to the accumulation of viruses within the plant as well as the buildup of other undesirable traits, causing degeneration of the garlic's varietal characteristics. Degenerated garlic plants are short and small, have low photosynthetic capacity, produce smaller bulbs, and decline in quality, seriously affecting garlic yield and profitability. The key techniques for garlic seed selection and purification-rejuvenation are introduced below: 1. Establish off-site garlic seed-production fields. Establishing garlic seed fields with a certain degree of regional and cultivation difference can prevent
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Identification and Control Methods for Fish Lice (Argulus sp.)
Signs of Infection Fish lice are disc-shaped parasites, 8 to 12 mm in diameter, and come in various colors, from light green to brown. They can be seen attached to the fish's body and fins. Fish Affected Fish lice can infest many species of coldwater fish. They are almost impossible to find on tropical species unless the parasites are brought into the aquarium on live food or plants. Even then, fish lice cannot survive for long in warm water. Details of Infection These parasitic crustaceans have eight feathery legs,
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How to Identify True and False Gastrodia? A Detailed Guide to Practical Identification Methods
Gastrodia is a precious Chinese medicinal herb. With the gradual shortage of wild Gastrodia resources, Gastrodia has been listed as a nationally protected third-class endangered plant. In recent years, although artificial cultivation of Gastrodia has progressed rapidly, due to large demand, market shortages, and firm prices, some lawbreakers have taken the opportunity to pass off fakes as genuine. For this reason, the methods for identifying true and false Gastrodia are introduced as follows: 1. True Gastrodia. It has eight major characteristics: (1) The underground tuber is ovate or elliptical; after processing, steaming, and drying, it usually appears as a long ellipse, slightly flat, sometimes curved,
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Symptom Identification and Control Methods for Cotton Brown Spot Disease
Symptoms The disease mainly affects leaves. When cotyledons are infected, pinpoint-sized purplish-red spots first appear, then expand into brown, purplish-edged, slightly raised round to irregular lesions; multiple lesions merge together to form large patches, with small black dots scattered in the center, which are the pathogen's pycnidia. The center of the lesion easily breaks off and falls out, forming holes, and in severe cases the leaves drop off. On true leaves, the lesions are round, yellowish-brown, with purplish-red edges. Pathogen Phyllosticta gossypina Ell. et Mart., called cotton Phyllosticta leaf spot
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Symptom Identification and Control Methods of Lily Viral Diseases
Common lily viral diseases include the yellowing-wilt type and the mosaic type. In the yellowing-wilt type, no special lesions appear on the leaves; the entire plant takes on a yellow color, and the internodes shorten. The plant becomes dwarfed, and the leaves yellow and shrivel. In the mosaic type, irregular pale green mottling appears on the leaves, then the small pale green areas join and expand, forming slender yellow streaks along the veins, which later become slightly sunken and turn pale yellowish-brown to reddish-brown. The virus mainly overwinters in the bulbs and becomes the source of primary infection the following year; secondary infection in the field is mainly caused by transmission by aphids. When there are many diseased bulbs, the weather is dry, and aphid populations are
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Garlic Disease Identification and Integrated Control Techniques
In recent years, with the expansion of garlic planting areas, continuous changes in cropping systems and cultivation ecological environments, the disease resistance of garlic plants has also decreased year by year, and the losses caused by garlic diseases have become increasingly severe. In particular, the continuous emergence of new diseases, with some diseases even showing a sharp upward trend, has further intensified the harm to garlic. According to investigation and analysis, the damage caused by garlic diseases generally results in a loss rate of 20%-30%, and in severe years and plots, it can reach over 50%, or even higher. For example, in a 1993 survey, garlic rust disease in Zhongmu County reached a diseased plant rate of up to 80% in severely affected garlic fields, with the affected area exceeding 65% of the planted area. The affected garlic was severely downgraded, affecting export earnings and greatly dampening the enthusiasm of garlic farmers. At present, more than 20 known garlic crop diseases exist, caused by fungi, bacteria, viruses and nematodes respectively. In addition, physiological diseases are also attracting increasing attention. The occurrence and damage of diseases has become a major obstacle in garlic production. The main garlic diseases and their integrated control techniques are introduced as follows.
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How to identify contaminant fungi in edible mushroom cultivation? Simple identification methods to share
During the cultivation of edible mushrooms, various harmful organisms and abiotic disturbances often occur. Mushroom growers all consider contaminant fungi to be a major enemy in production, and they must be recognized and prevented in advance, with targeted control, in order to ensure a good harvest. 1. Competitive contaminant fungi are mainly some saprophytic fungi that compete with edible mushrooms for nutrients, water and oxygen in the substrate, especially in the early stages of cultivation management when they are more likely to invade the mushroom blocks, secrete toxins, and inhibit the expansion and spread of the edible mushroom mycelium. 2. Infectious and non-
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Identification and Control Methods of the Box Tree Moth
The box tree moth Diaphania perspectalis (Walker), also known as the box tree black-margined pyralid moth, belongs to the order Lepidoptera, family Pyralidae. [Distribution and damage]: It is distributed in Shaanxi, Hebei, Jiangsu, Zhejiang, Shandong, Shanghai, Hubei, Hunan, Guangdong, Fujian, Jiangxi, Sichuan, Guizhou, Xizang and other places. It damages boxwood, littleleaf boxwood, Lushan boxwood, Korean boxwood, etc. The larvae often connect surrounding leaves with silk to form a temporary nest, in which they feed; when the infestation is severe,
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Symptom Identification and Control Methods of Impatiens Green Petal Disease
Also known as balsam green-change disease, it is sporadically distributed in Jiangsu, Anhui, Hebei, Beijing and other places. It mainly damages the floral organs of Impatiens balsamina (garden balsam), causing them to lose their normal ornamental value. Symptoms: affected plants mainly show flowers turning into leaves, that is, the petals change from normal pink to green, slender like leaves; some petals become leaf-like, retaining only a small amount of red. New plants of the current year show symptoms after blooming. In the high-temperature summer season, the flowering period is shorter than normal, and the inner petals of the corolla quickly turn brown, die and fall off. Under the same cultivation and management conditions, diseased plants are shorter than healthy plants, and the leaves often curl upward from the edges, not
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Identification and Control Methods of the Impatiens Hawk Moth
The scientific name of the impatiens hawk moth is Deilephila elpenor lewisil Butler. It is a major pest of impatiens and is distributed in Northeast, North, East and Northwest China. Besides impatiens, its host plants also include autumn orchids, herbaceous flowers and others. Damage characteristics: this insect feeds on leaves in the larval stage, affecting the growth and development of the plant, and is a major pest of impatiens. Morphological characteristics: the adult body length is 33-40 mm, and the wingspan is 55-70 mm. The wings and body are red
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