rots (Great Plains); seedling blight (Great Plains). Indian ricegrass {Oryzopsis hymenoides) : Seedling blight (far West) ; common root rot and crown rot (far West) ; rhizoctonia rot (scattered) ; snow molds (Pacific Northwest); seed rots (general); root necrosis and crown rots (far West). Kentucky bluegrass {Poa pratensis): Dollar spot (Northeast) ; brown patch (general); foot rot, Helminthosp...

In many Arkansas cotton fields, factors such as inefficient tillage operations, extremely dry weather and traffic pressure may result in a compacted soil layer or hardpan. Soil compaction dramatically increases soil strength and can restrict cotton root penetration, leading to suppressed cotton height and lint yield (Taylor and Earl Burnett, 1963). This problem may be exacerbated by soilborne p...

Historically, root diseases have been a production-limiting problem for the strawberry industry worldwide. Even though this disease is of great economic importance, etiology remains unresolved. However, soilborne fungal pathogens, particularly Pythium and Rhizoctonia spp. implicated as major role players. Presence nematodes in soil favourable environmental conditions also play significant devel...

One root disease complex often associated with strawberry plants grown in nonfumigated soil is referred to as black root rot. While not currently a widespread problem in properly fumigated commercial production fields, with the impending phase out of the use of methyl bromide and alteration of current fumigation practices this disease complex may once again become a problem. In other strawberry...

many fungi cause sugar beet root rot during various stages of the plant growth. among them rhizoctonia spp. induce crown rot, dry rot and violet root rot on sugar beet (whitney and duffos,1986). root rot caused by phytophthora drechsleri has been observed in fields with excessive moisture (habibi,1975). pythium aphanidermatum has been recognized as one of the causal agents of sugar beet, dampin...

Antifungal activity of ethanol-water extracts of four medicinal plants, cinnamon (Cinnamomum verum Presl.), anise (Pimpinella anisum L.), black seed (Nigella sativa L.) and clove (Syzygium aromaticum L. Merr. & Perry.) was investigated against pea (Pisum sativum L.) root-rot fungus Rhizoctonia solani. In vitro antifungal activity test shown a high growth inhibition at concentration (4%) of each...

The root rots of wheat, oats, barley, and rye are among the least conspicuous diseases of cereals, but they are among the most destructive. They are caused by many species of fungi, which are widespread and live on or in seed, soil, and dead plant refuse. They attack a large number of hosts and thrive under a wide range of conditions. To the many types of root rots in cereal crops many names ha...