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What chemical agents should be used to control tomato root-knot nematode disease?
In recent years, the occurrence of tomato root-knot nematode disease has shown an upward trend, especially in dry sandy loam soil where the disease is severe, causing great losses. Root-knot nematodes have a wide range of hosts; besides damaging tomatoes, cucumbers, sweet peppers and others also suffer severely. Root-knot nematodes often overwinter in the soil as eggs or second-stage larvae with galls, root knots, and diseased plant residues...
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What are the methods for identifying the symptoms of barley stripe disease?
How do you identify the symptoms of barley stripe disease? Barley stripe disease is a disease caused by systemic infection from seed-borne bacteria. Seedlings can develop the disease as soon as the 1st to 2nd young leaves emerge. Initially, there are pale yellow spots or short small stripes, and later the lesions gradually expand. By the tillering stage, slender stripes parallel to the leaf veins form from the leaf base all the way to the leaf tip, and the color changes from...
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Sweet Cherry Pest and Disease Control Methods and Techniques
(1) Main diseases 1. Cherry brown spot disease: also known as leaf shot hole disease, it is the most important leaf disease of sweet cherry. (1) Symptoms: At the early stage of the disease, small purple spots the size of a needle tip form, then enlarge, and some join together to form round brown lesions, on which small black dots appear, namely conidia masses and perithecia. ...
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What chemicals should be used to control tomato leaf curl disease?
For physiological leaf curl, the control measures are timely watering and fertilizing after fruit set, and covering with a shade net: cover it during the day on sunny days, uncover it at night, and do not cover it on cloudy days. The symptoms of damage by the broad mite (Polyphagotarsonemus latus) are leaves becoming narrower, stiff and upright, shrunken or distorted and deformed, and finally the growing tip becoming bare. For chemical control, 1.8% Abamectin can be sprayed at a 3000-fold dilution. Hormone...
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Identification and Control Methods for Common Cherry Diseases and Pests
Many of the diseases and pests affecting cherries are the same as those of other stone fruit trees, so their control methods can be used for reference. The main diseases harming cherries are shot hole disease, crown and root collar rot, and gummosis. Crown and root collar rot mostly occurs on trees in their first fruiting stage, causing the crown and root collar to decay. Control methods: mainly avoid piling soil around the root collar for long periods, and control underground pests that gnaw and wound the bark. At the same time, check frequently; when diseased plants are found, scrape and treat them promptly, and after scraping, disinfect with Bordeaux mixture or lime sulfur mixture. For severe crown and root collar rot, the aboveground growth can also be restored through spring bridge grafting. The main pests harming cherries include the red-necked longhorn beetle, the golden-line jewel beetle, the small clearwing moth, the spherical scale insect, and the phalera caterpillar. The small clearwing moth has one generation per year, and its larvae cause damage within the cortex of large branches. Control measures mainly include spraying during the peak emergence period of adults, whitewashing the branches and trunk to prevent egg laying, and promptly spraying or digging out larvae when their frass is found in the field.
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Spring peanut planting should emphasize increased phosphate fertilizer application
After spring peanut planting this year, there has been more rain, many overcast and rainy days, and high field humidity, which is favorable for the reproduction of peanut rust pathogen. Damage has already begun to occur. If measures are not taken in time to prevent and control it, peanut yield will be seriously affected. Peanut rust mainly damages leaves, but also damages stems, pod stalks and pod shells. Generally...
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Control Methods and Precautions for Mung Bean Leaf Spot Disease
Mung bean leaf spot disease is a serious disease harming mung beans, causing the leaves to dry up, quality to decline, and yield to decrease. Below is an introduction to the symptoms, transmission routes, conditions for onset, and control methods of mung bean leaf spot disease. Symptoms: Mung bean leaf spot disease mainly harms mung beans, with the affected part being the leaves. ...
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How to prevent and control ginger pests and diseases? A full analysis of practical techniques
(1) Ginger blast 1. Pathogen: a bacterial disease, Ralstonia solanacearum. 2. Symptoms of diseased plants: leaves first droop and lose their luster, then turn withered yellow from bottom to top, and finally die. The stem first becomes water-soaked at the base, turns yellow, dies, and breaks off at the base and falls over. The rhizome is water-soaked, turns brown and rots, and when squeezed a white juice flows out with a foul odor.
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What are the main diseases of mung bean? Detailed explanation of control methods
When planting mung bean, chemical fertilizers cannot be used as fertilizer, and nitrogen-containing fertilizers should be avoided even more. Moreover, sowing cannot be done before rain, and when sowing, the seedlings should be even, so that balanced nutrition can be ensured. The field should be inspected in time, and areas with missing seedlings should be replanted in time, with seedlings thinned at the 4-leaf stage. In poor plots, during the seedling stage every...
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Mung bean diseases are frequent during the flowering period, and growers need to control them promptly
At present, mung beans have entered the flowering and pod-setting stage, and diseases and pests have been found in some fields, among which mung bean leaf spot, viral disease, damping-off, and soybean aphids cause relatively serious damage to mung beans. 1. Mung bean leaf spot: mainly damages leaves, with light brown or dark brown lesions appearing on the leaves, and obvious yellow halos at the edges,...
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