Use of acrylic forming polymers film in controlling wheat stem rust disease [electronic resource].

Includes references.

Two film-forming polymers namely styrene acrylicemulsion and emulsion wax were used to control stem rust of wheat caused by Puccinia graminis f.sp. tritici (Eriks) Henn. All experiments were carried out under greenhouse and field conditions using the most susceptible wheat cultivar (Giza-160). III seedling stage, application of styrene acrylic-emulsion polymer 31 24% concentration 24 h before pathogen inoculation led to complete reduction in number of pustules/cm2 • Adult stage experiments showed significant decreases in number of developed pustules/em!, rust severity and area under disease progress curve (AUDPC), compared with control plants. All treatments under investigation showed an increase in chlorophyll a, band carotenoids. Application of fibn-forming polymers in field experiment during 2001-2002 and 2002-2003 growing seasons led to an increase in yield components. Scanning electron microscope (SEM) studies were carried out to evaluate the mode of action of film-forming polymers in controlling stem rust of wheat. Scanning electron micrographs showed complete coverage of leaf surface with film forming polymers, sticking groups of ungerminated urediospores, deformation of appressoria as well as unsucceeded germination of urediospores.

Summary in Arabic.

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