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Causes of Flower Drop in Greenhouse Eggplants and Control Methods
There are many causes of flower drop in eggplants. For example, excessive vegetative growth, weak plant growth, soil that is too dry or too wet, and excessively high temperatures or insufficient light can all cause flower drop in eggplants. Control measures for excessive vegetative growth: carry out timely seedling hardening of the young plants, appropriately control water and fertilizer during the seedling hardening period, cultivate and loosen the soil...
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How to control root maggots in autumn cabbage? These methods you need to master
During the growth of autumn cabbage, the most dreaded pest is the root maggot (also called cabbage root maggot). It gnaws at the epidermis of the Chinese cabbage roots, allowing soil-borne pathogens to invade through the wounds, causing the cabbage to drop its outer leaves and rot. This not only reduces cabbage yield but also affects its edible value. If not controlled in time, it can damage the entire field, causing serious losses to vegetable growers...
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How to prevent and control grape diseases in the rainy season? A detailed guide to practical methods
The peak period for many diseases such as grape downy mildew, white rot and anthracnose is summer. The occurrence of downy mildew can cause grape leaf drop, dead branches, rotten fruit and even death. Therefore, China Agricultural Technology Network reminds you to strengthen vineyard management during the rainy summer season and to prevent and control diseases in good time. 1. Clean the vineyard: if in the vineyard...
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Symptom Identification and Control Methods of Sorghum Leaf Spot
Symptoms Also called spot disease. All parts of the whole plant can be affected, mainly damaging the leaves. The lesions are irregular in shape, long to spindle-shaped or semicircular, varying in size, can reach about 1cm or more, yellow-brown to gray-brown, with red-purple edges. The lesions often start from the leaf margin or leaf tip, and some also occur on the leaf surface or the upper part of the panicle...
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Symptoms and Control Methods of Bacterial Red Stripe Disease in Sorghum
Symptoms mainly affect leaves. Leaf spots initially appear as water-soaked, narrow, fine small stripes, which after expansion turn light reddish-brown. Some lesions have brown centers with red edges, and broad long-ovate lesions appear intermittently on the stripes. Sometimes the lesions can cover most of the leaf area. When humidity is high, small granular bacterial ooze can be seen overflowing, and after drying...
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Symptoms and Control Methods of Sorghum Banded Leaf and Sheath Blight
Symptoms: This disease occurs commonly in northern China and Taiwan, China, and is more severe in hybrid sorghum; it also occurs in central and southwestern China. It mainly affects the leaf sheath, but can also affect the leaves. After infection, water-soaked lesions first appear on the stem near the ground, followed by lesions on the leaf sheath with alternating purplish-red and grayish-white bands. In the late growth stage or under rainy and humid weather...
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Symptoms and Control Methods of Sorghum Anthracnose
Symptoms This disease is an important disease of sorghum and occurs in all sorghum-producing areas. It can infect plants from the seedling stage to the mature plant stage. Infection at the seedling stage damages the leaves, causing leaf blight and resulting in dead sorghum seedlings. Leaf lesions are spindle-shaped, reddish-brown in the center with purplish-red margins, and dense small black dots appear on the lesions, which are the pathogen's acervuli. Anthracnose...
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Occurrence Patterns and Control Methods of Sorghum Head Smut
As the sorghum planting area continues to expand and the planting years lengthen, the damage caused by sorghum head smut is becoming increasingly serious, directly affecting the development of sorghum production. I. Degree of damage: In the early 1990s, sorghum head smut occurred only sporadically in a few local areas of the county. By 2000, the affected area in individual townships was about 43 hectares, with a diseased plant rate of 15%, while other planting areas had only mild occurrence. According to a 2004 survey, the affected area in the county was 800 hectares, accounting for 34% of the total sorghum sown area, with an average diseased plant rate of 20.5% in affected fields; in 2005, the affected area in the county was 1333 hectares, accounting for 67% of the total sorghum sown area, with an average diseased plant rate of 31.2% in affected fields. In the sorghum planting area of the Second Brigade of Biesituobie Township, the diseased plant rate reached 70.5%, with a severity of 70%.
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Symptom Identification and Control Methods for Sorghum Head Smut
Symptoms The diseased plants are shorter than healthy plants. In the early stage of the disease, the ear sheath of the diseased ear is very tight, the lower part is swollen, and the flag leaf is upright; when peeled open, a white rod-shaped structure can be seen inside, namely the smut gall. The smut gall inside the sheath is initially small and finger-shaped, gradually grows larger, and later the middle part swells into a cylindrical shape and becomes relatively hard. During the development of the smut gall, the internal tissue changes from white to black, then...
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Symptom Identification and Control Methods for Sorghum Downy Mildew
Sorghum seedling blight - Symptoms: The disease can occur when sorghum grows to 4-5 leaves. It starts from the lower leaves and then spreads upward. Infected leaves develop purplish-red streaks that gradually merge, causing the leaves to gradually die from the tip, and the seeds turn very brown. Sorghum seedling blight - Pathogen: Known as Fusarium moniliforme, a fungus belonging to the subphylum Deuteromycotina. On PDA medium...
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