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Plant Pathology

Common smut (Ustilago maydis) Of Maize

DISEASE: Common smut (Syn. boil smut, blister smut) PATHOGEN: Ustilago maydis (Syn. Ustilago zeae) HOSTS: Maize (Zea mays), teosinte (Zea mexicana) Taxonomy of ustilago maydis Kingdom :Fungi – champignons, Fungo, fungi Subkingdom: Dikarya Division: Basidiomycota – basidio’s, basidiomycetes, club fungi Subdivision: Ustilaginomycotina Class :Ustilaginomycetes Subclass: Ustilaginomycetidae Order :Ustilaginales Family: Ustilaginaceae Genus: Ustilago (Pers.) Roussel Species …

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Fungal Disease In Plant

Fungal Disease In Plant

Fungi constitute the largest number of plant pathogens and are responsible for a range of serious plant diseases. Most vegetable diseases are caused by fungi. They damage plants by killing cells and/or causing plant stress. Sources of fungal infections are infected seed, soil, crop debris, nearby crops and weeds. Fungi …

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Diseases of Coconut and Oil palm

Diseases of Coconut and Oil palm

Coconut 1.Bud rot(Phytophthora palmivora) Symptoms Palms of all ages are susceptible to the disease, but it is more severe in young palms of 5-20 years. The first indication of the diseases is seen on the central shoot of the tree (spindle). The heart leaf shows discolouration which becomes brown instead …

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Mutation

Mutation

Mutation, an alteration in the genetic material (the genome) of a cell of a living organism or of a virus that is more or less permanent and that can be transmitted to the cell’s or the virus’s descendants. The genomes of organisms are all composed of DNA, whereas viral genomes can be of DNA or RNA. Mutation in …

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Diseases of Onion & Garlic

Diseases of Onion & Garlic

Diseases of Onion & Garlic 1.Basal Rot: Fusarium oxysporum f.sp. cepae Symptoms The leaves turn yellow and then dry up slowly. The affected plant shows drying of leaf tip downwards. The entire plant shows complete drying of the foliage. The bulb of the affected plant shows soft rotting and the …

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