Plant hormones play important roles in regulating developmental processes and signalling networks involved in plant responses to a wide range of biotic and abiotic stresses. Salicylic acid (SA), jasmonates (JA) and ethylene (ET) are well known to play crucial roles in plant disease and pest resistance. However, the roles of other hormones such as abscisic acid (ABA), auxin, gibberellin (GA), cy...

the onobrychis viciafolia is one of the forage and rang land plants that is adapted and spread to different climates of iran. one of the important disease of this plant is powder mildew in the lorestan province which damages second and next cutting stages of this plant. to study the correlation between disease severity and forage quality, seeds of 34 populations were planted in field of khorram...

abstract application of chemicals which activate plant defense mechanisms before pathogen attack without environmental side effects of protective chemical agents have stimulated great deal of researches in this area. one of the important crops in the world is tomato and recently recognized as a model plant for plant-pathogen interactions. tomato early blight is one of the most devastating disea...

JOHNSON, BRENDA LYNN. The Effects of Habitat Fragmentation and Connectivity on Plant Disease. (Under the direction of Nick M. Haddad.) Within a large-scale habitat corridor experiment, I performed both experimental and observational studies to determine the effects of habitat fragmentation, habitat edge, and patch connectivity on the movement and incidence of fungal plant diseases. Increased sp...

Agricultural pesticides when properly used can be highly effective for protection of plant and animal health. When misused, the environment as well as the agricultural community suffers. Because of the sporadic and often devastating occurrence of plant diseases and because of the development of very effective protectanttype pesticides, these are often used when the pathogen or conditions for in...

in order to investigate genetic correlation and path analysis between grain yield and yield components, fifteen early maturing hybrids of grain corn (zea. mays) using a randomized complete block design with 4 replications were evaluated in khoramabad agricultural research center, iran. the data were collected and analyzed for ear emergence date, anthesis date, maturity date, plant height, ear h...