Tan spot, caused by Pyrenophora tritici-repentis, is an economically important foliar disease of wheat in Kazakhstan. Population structure the pathogen changes every year due to climate change. This study aimed characterize race P. tritici-repentis isolates recovered from south and north Kazakhstan, identify tan spot resistance host genotypes based on phenotypes molecular screening. Virulence p...

Tile wheat gall nematode, Anguina tritici (Steinbuch 1799) Chitwood, 1935 does not travel far in the soil by its own efforts after i t emerges f rom the gall. When larvae are bur ied 15-20 cm under the surface, there is little infection of wheat, according to Marcinowski (3). Below 30 cm there is no infection and horizontal travel is f rom 5 to 20 cm. Marcinowski 's experiments were apparent ly...

Seasonal flight activity of thrips was examined in commercial tomato fields, Lycopersicon esculentum L., on Virginia’s (USA) Eastern Shore in 2000 and 2001. In each of three regions along the Shore, populations of adult thrips infesting tomato flowers and dispersing within tomato fields were monitored weekly. Frankliniella fusca (Hinds) was the only thrips species captured that is currently con...

BACKGROUND Take-all of wheat, caused by the soil-borne fungus Gaeumannomyces graminis var. tritici, is one of the most important and widespread root diseases. Given that take-all is still hard to control, it is necessary to develop new effective agrochemicals. Pyrazole derivatives have been often reported for their favorable bioactivities. In order to discover compounds with high fungicidal act...

shenavar  o. & mostowfizadeh-ghalamfarsa  r. 2015. computerized interactive keys for identification of fungi. plant pathology science 4(2):41-52 accurate identification of fungi and fungus-like organisms is one of the most important steps for finding an approach to employ or control them. nevertheless, this process is usually laborious and slow. application of interactive keys is one of the way...

Phenazine antibiotics produced by Pseudomonas fluorescens 2-79 and Pseudomonas aureofaciens 30-84, previously shown to be the principal factors enabling these bacteria to suppress take-all of wheat caused by Gaeumannomyces graminis var. tritici, also contribute to the ecological competence of these strains in soil and in the rhizosphere of wheat. Strains 2-79 and 30-84, their Tn5 mutants defect...

The disease septoria leaf blotch of wheat, caused by fungal pathogen Septoria tritici, is of worldwide concern. The fungus exhibits a hemibiotrophic lifestyle, with a long symptomless, biotrophic phase followed by a sudden transition to necrotrophy associated with host necrosis. Little is known about the systematic interaction between fungal pathogenicity and host responses at specific growth s...

Previous studies with the wheat smut fungus, Tilletia caries, showed that this organism contains all the enzymes necessary for the operation of the pentose cycle and apparently of glycolvsis as well (Newburgh et al., 1955). Since the occurrence of a different pathway of carbohydrate catabolism or the predominance of a known pathway in the smut organism may be of importance for the control of sm...

The wheat Tsn1 gene on chromosome 5B confers sensitivity to a host-selective toxin produced by the pathogens that cause tan spot and Stagonospora nodorum blotch (SNB) known as Ptr ToxA and SnToxA, respectively (hereafter referred to as ToxA). A compatible Tsn1-ToxA interaction is known to play a major role in conferring susceptibility of hexaploid (common) wheat to SNB. However, a recent study ...