Pyrenophora tritici-repentis (Ptr) is a causal agent of tan spot in wheat Kazakhstan, as it has been around the world. The pathogen produces host-specific toxins which interact with host sensitivity loci. aim this study was 1) to identify whether selected Kazakhstani isolates P. tritici- repentis possessed Ptr toxin genes ToxA and/or ToxB and 2) varieties resistant HST ToxB. As result analysis ...

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 ...

Chemical control is the most widely used method for disease management in significant crops such as soybeans and wheat. However, a few years biological has gained prominence. Thus, we evaluated antagonism of bacteria Pseudomonas fluorencens, Pantoea aglomerans, Bacillus sp. on phytopathogens Corynespora cassiicola Drechslera tritici-repentis, previously isolated from soybean wheat leaves, respe...

Tan spot caused by the fungus Pyrenophora triticirepentis is a serious disease of wheat, which is on increase in recent years in Mediterranean region. In the field this fungus produces a diamond-shaped necrotic lesions with a yellow halo on wheat foliage. The objective of this study was to characterize and compare several monospore isolates of P. tritici-repentis collected from different infect...

Rye (Secale cereale L.) serves as an alternative host of Pyrenophora tritici-repentis (PTR) the cause of tan spot on wheat. Rye is cultivated as a forage or cover crop and overlaps with a significant portion of wheat acreage in the U.S. northern Great Plains; however, it is not known whether the rye crop influences the evolution of PTR races. We evaluated a global collection of 211 rye accessio...

There are various types of discolouration that can affect common (Triticum aestivum L.) and durum [T. turgidum L. ssp. durum (Desf.) Husn.] wheat kernels grown on the Canadian Prairies. Black point and dark smudge, mostly associated with Alternaria alternata (Fr.) Keissl., and Cochliobolus sativus (Ito & Kurib.) Drechs. ex Dast. [anamorph Bipolaris sorokiniana (Sacc.) Shoemaker] are common disc...