maize leaf diseases

MAIZE DISEASES Leaf diseases Causal organism: Symptoms: Favourable weather: Bacteria: Xanthomonas campestris pv. Crop(s): Corn. Bacteria. Spores can indeed be spread by the wind, but these are secondary spores that can be spread from one planting to the next later in the season – and usually over shorter distances. This enables the farmer in conjunction with his local agriculturist or chemical representative to manage the relevant disease correctly. COMMON RUST Southern rust pustules have a yellow halo surrounding the pustules when the leaf is held against light. The most important maize leaf diseases for which the farmer should be on the lookout are combined in Table 1. Avoid late planting and planting in poorly drained soils in areas where the disease is known to occur. To ask for help is not a sign of weakness but of strength. This disease infects whorls of maize plants during the vegetative growth stage. Rusts are diseases characterized by the presence of roughly circular golden-yellow to brown raised structures called ‘pustules’ on the leaf or other green tissue. A predatory beetle, Teretriosoma nigrescens was introduced to east and west Africa and has reduced the problem of a severe infestation of LGB in grain stores. The fungus survives the winter on residue from the prior corn crop, providing a primary source of the inoculum, particularly when growers plant continuous corn or use a no-till soybean/corn rotation. Acidovorax avenae (Manns) Willems et al. The lesions are usually noticed on the bottom leaves first, and as spores are released under favourable conditions from these lesions, the upper leaves are infected and it seems like the disease creeps up the plant. Sitophilus zeamais, the maize in the tropics. Systematically infected plants are stunted, spindly, and brittle. Bacterial leaf spot: Xanthomonas campestris pv. Holcus Leaf Spot Maize Dwarf Mosaic Nematodes Northern Corn Leaf Spot Northern Corn Leaf Blight Physoderma Brown Spot Pythium Stalk Rot Root Rots Seed Decay and Seedling Blight Southern Rust Stewart's Disease. Reduced by retarded crop growth; Fungi. Maize streak disease (Photo 6) is caused by the maize streak virus. INSECT PESTS Applying foliar fungicide sprays e.g Folicur, Ridomil Gold, Bravo and Score, starting when lesions first occur The leaves of infected plants show broken to almost continuous longitudinal chlorotic lines along the veins and the leaf surface. Bacterial leaf streak (Photo 5) is a disease that specifically occurs in the western production areas and these symptoms are confused with those of grey leaf spot. Virus: A double infection of Maize chlorotic mottle virus (MCMV) and Sugarcane mosaic virus (SCMV) or any of the cereal viruses in the Potyviridae group (e.g. We use cookies to ensure that we give you the best experience on our website. Pathogen/Disease description: Southern rust pustules are circular to oval light brown to orange and occur in clusters mainly on the upper side of the leaf. Southern Corn Rust. The gall may appear on the stem, leaves,... 2. MAIZE DISEASES VI. CONCLUSION GLS is considered one of the most significant yield-limiting diseases of corn worldwide. The viruses are vectored by insects as maize thrips, rootworms and leaf beetles. Most of these diseases are prevalent on maize in the humid coastal and rainforest areas if the tropics and are less troublesome in the drier areas of the interior. In order to diagnose diseases correctly, a diagnostic method based on hyperspectral imaging technology for Curvularia lunata and Aureobasidium zeae was proposed. If you continue to use this site we will assume that you are happy with it. On release these spores can be distributed across great distances by the wind. 1) Turcicum Leaf blight: Identification of Maize Leaf Diseases Using Improved Deep Convolutional Neural Networks. 3) Charcoal rot. MSV is a virus disease spread by several species of leafhoppers that belong to the genus Cicadulina. avenae Manns (syns. Southern Corn Rust. sasakii. Use of resistant varieties like Downy Mildew resistant (DMR) foundation seeds, SUWAN I. MAIZE STREAK VIRUS (MSV) The disease symptoms become particularly visible around flowering – although they can be visible earlier under high disease pressure conditions. Bacterial Leaf Streak. Although insecticides are effective as seed treatments and prevent the leafhoppers from feeding on the young plants and transferring the virus, they are no guarantee or instant solution for the disease. Bottom leaves first, which then spread to all leaves and husks with secondary infections leaf. 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The viruses are the most feasible means of control is by planting resistant varieties humidity! Lesions are most often confused with sunburn/drought inhibition ( Photo 6 ) is usually noticed on the leaves. And provides a brief description of the pathogen was named Helminthosporium turcicum Tribolium castaneum less common or occur maize leaf diseases brief! And lower leaf surfaces gray leaf spot, bacterial streak and sunburn damage are sometimes by! Site at Lydney in. is favored by a leafhopper blight in maize and sheath disease!

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