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Symptom Identification and Control Methods of Peach Shot Hole Disease
Peach shot hole disease is the most common leaf disease on peach trees. It occurs in peach-producing regions worldwide. It includes three types: bacterial shot hole, mildew spot shot hole, and brown spot shot hole. Among them, bacterial shot hole is the most common and is widely distributed in peach-producing regions across the country. Infection of peach trees by this disease can cause a large number of leaves to develop holes and drop off, branches and shoot tips to die, severely weakening tree vigor, affecting flower bud differentiation, and causing huge losses. In addition to harming peach trees, the three types of shot hole disease also harm stone fruit trees such as plum, apricot, and cherry. [Symptoms] Detailed
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Control Methods and Key Technical Points for the Peach Borer
The peach borer, also known as the peach fruit borer, peach fruit worm, peach borer worm, etc. It belongs to the order Lepidoptera, family Pyralidae. 1. Morphological characteristics: The adult is about 12 mm long, with a wingspan of 22-25 mm, orange-yellow, with more than 20 black spots on the forewings and more than 10 on the hindwings. The eggs are oval, initially milky white, turning reddish-brown before hatching. The larva is 22 mm long, with a dark brown head and neck, a pale red back, and several pale brown spots on each body segment. The pupa is about 13 mm long, brown, with 6 curled anal spines at the end of the abdomen.
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Symptoms, Identification, and Control Methods of Black Belly Disease in Scorpions
Also called black rot, it is caused by eating spoiled feed and becoming infected with black mold, or by environmental pollution and unclean drinking water. The disease mostly occurs in summer. Symptoms of affected scorpions are: in the early stage, the scorpion's abdomen turns black, the abdomen swells, activity decreases or stops, and appetite decreases or the scorpion stops eating; in the later stage, black decay appears on the front abdomen, and squeezing it by hand causes black mucus to flow out. This disease has a short onset time and a high mortality rate. Control methods: keep the feed and drinking water fresh and clean, and frequently wash the food dish and water dish; when sick
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What are the control methods for geranium brown spot disease?
Control of geranium brown spot disease: 1. Collecting and burning diseased and dead plant tissue is the key to controlling this disease. For potted plants or field beds, waterlogging and damp, shady conditions should be avoided. 2. Before and after the onset of the disease, spray a 50% carbendazim 800 to 1000 times dilution or a potassium permanganate 1500 times dilution, once every 10 days, for 2 to 3 consecutive sprays.
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What are the control methods for crown gall disease in geraniums?
Control of crown gall disease in geraniums: 1. Before planting, find and pull out diseased plants. When necessary, disinfect the stem base of the seedlings by first soaking in 1% copper sulfate for 5 minutes, then transferring to 2% lime water for 1 minute. 2. Choose soil free of crown gall disease as nursery soil and potting soil. For potted plants that develop the disease, replace with disease-free soil. 3. For plants in the early stages of the disease, use a knife to cut away the gall, then apply lime sulfur mixture residue or Bordeaux paste to the wound, or apply methyl-acetic-iodine solution (50 parts methanol, 25 parts glacial acetic acid, 12 parts iodine flakes) to the gall, which can heal the affected area.
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Identification and Control Methods for Geranium Alternaria Leaf Spot
Geranium Alternaria leaf spot is a common leaf disease of geranium. The pathogen has a wide host range and can attack many woody and herbaceous ornamental flowers, seriously affecting their ornamental value. Symptoms: In the early stage of the disease, chlorotic spots appear on infected leaves, and the lesions gradually expand to form larger circular spots. The spots are dark brown with concentric rings. In the late stage of the disease, a dark green mold layer appears on the spots, which consists of the conidia of the pathogen. Pathogen: The pathogen is Alternaria tenuis Nees, belonging to
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Causes and Control Methods of Pelargonium Leaf Curl Disease
Pelargonium leaf curl disease, also known as Pelargonium crinkle disease, is a viral disease that has only been found in the Shanghai area. Symptoms: The leaves of infected plants curl downward and become stunted. In severe cases, the plants die. Pathogen: The pathogen is Pelargonium leaf curl virus (PLCV). Disease pattern: The virus is transmitted by sap, grafting and soil; no vector insect has been found. In summer and autumn, the symptoms of the disease are not obvious, and the residual virus-carrying plant debris from pruning can spread the virus.
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Symptoms and Control Methods of Geranium Ringspot Disease
[Pathogen]Tobacco ringspot virus (Tobaccoringspotvirus, TomRSV), thermal inactivation point 58°C; Pelargonium ringspot virus (prlargoniumringspotvirus, PRSV), thermal inactivation point 85°C. [Symptoms]Chlorotic yellow spots, ringspots and line patterns appear on leaves, plants grow stunted, and flowers develop abnormally. [Disease pattern and epidemic characteristics]Propagating from cuttings taken from diseased plants is the main route of virus transmission. Sap
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Control Methods for Geranium Mosaic Disease (CMV)
Symptoms: Leaf symptoms appear as a mosaic pattern; the leaves are smaller than normal and show an uneven, bumpy surface. On some varieties, chlorotic spots develop and the flowers become color-broken. The pathogen is Cucumber mosaic virus (CMV). Transmission routes are sap transmission and aphid transmission. Control methods: 1. During management operations, frequently wash and disinfect with soapy water. 2. Control aphids promptly and eradicate surrounding weeds.
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Symptoms and Control Methods of Black Stem Rot in Geraniums
Black stem rot of geranium is a disease that occurs on the stems of geraniums, causing the stems to rot and even the whole plant to wither and die. Symptoms: The disease occurs on both cuttings and mature plants. Infected cuttings begin to rot from the base of the stem, and the rot gradually spreads upward, eventually leading to death. After mature plants are infected, the diseased part turns black and rots, gradually spreading upward, and eventually the leaves fall off. In severe cases, the diseased part girdles the stem, causing the plant to die. Pathogen: The pathogen is Pythium splendens
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