black stem of alfalfa

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• black stem — noun : any of various diseases of plants characterized by darkening of the stem: as a. : a disease of alfalfa caused by a fungus (Ascochyta imperfecta) b. : a disease of cabbage and cauliflower caused by a fungus (Phoma lingam) * * * Plant Pathol …   Useful english dictionary

• Alfalfa — This article is about plant and flower. For the actor and character of the series Our Gang, see Carl Alfalfa Switzer. For the community in Central Oregon, see Alfalfa, Oregon. Alfalfa Medicago sativa …   Wikipedia

• alfalfa weevil — a European weevil, Hypera postica, now also widely distributed in North America, that is an important pest, primarily of alfalfa, in both the larval and adult stages. [1910 15] * * * ▪ insect also called  Clover Leaf Weevil        (Hypera… …   Universalium

• АСКОХИТОЗ ЛЮЦЕРНЫ — англ.black stem of alfalfa (Ascochyta); leaf spot of alfalfa (Ascochyta); spring black stem of alfalfa нем.Blattfleckenkrankheit, Schneckenklee (Ascochyta) франц.ascochytose de la luzerne; taches foliaires de la luzerne (Ascochyta)… …   Фитопатологический словарь-справочник

• ПОЧЕРНЕНИЕ СТЕБЛЕЙ ФОМОЗНОЕ ЛЮЦЕРНЫ; ФОМОЗ ЛЮЦЕРНЫ — англ.black stem of alfalfa (Phoma) нем.schwarzer Stengel, Schneckenklee (Phoma) франц.phomose de la luzerne; tige noire de la luzerne возбудитель:Phoma melaena Mont. et Dur.; Podoplaconema melaena Petr. см …   Фитопатологический словарь-справочник

• plant disease — ▪ plant pathology Introduction       an impairment of the normal state of a plant that interrupts or modifies its vital functions.       All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …   Universalium

• Signs of pathogen presence in diseased plants — ▪ Table Signs of pathogen presence in diseased plants* sign description examples acervulus a shallow, saucer shaped fungal structure that bears asexual spores (conidia); it is usually formed below the cuticle or epidermis of leaves, stems, and… …   Universalium

• Some fungal diseases of plants — ▪ Table Some fungal diseases of plants disease causative agent hosts symptoms and signs additional features late blight of potato Phytophthora infestans potato water soaked dark green to black or purplish lesions with pale green margins on lower… …   Universalium

• Agriculture — General …   Wikipedia

• Liste des maladies du pois — Maladies du pois Les maladies du pois sont les maladies parasitaires qui affectent le pois cultivé (Pisum sativum). Provoquées par divers organismes vivants : bactéries, virus, champignons. Relativement nombreuses, ces maladies peuvent être… …   Wikipédia en Français

• Maladies du pois — Les maladies du pois sont les maladies parasitaires provoquées par divers organismes vivants (bactéries, virus, champignons) qui affectent le pois cultivé (Pisum sativum). Relativement nombreuses, ces maladies peuvent être spécifiques de l espèce …   Wikipédia en Français