Leaf spot of safflower caused by Alternaria carthami Chowdhury is common in all the safflower growing regions of the world. The disease was reported from India by Chowdhury (1944) and subsequently from erstwhile USSR (Nelen and Vasileva, 1960), United States (United States Department of Agriculture, 1961), Ethiopia and Kenya (Ellis and Holliday, 1970), Africa (Weiss, 1971), Australia (Irwin, 19...

Ashy stem blight [caused by Macrophomina phaseolina (Tassi) Goid.] can be a serious disease of common bean (Phaseolus vulgaris L.) under drought and high temperature conditions in some regions. The mode of inheritance of valuable sources of resistance is lacking. We studied inheritance of field resistance to ashy stem blight in a recombinant inbred population (’Dorado’ × XAN 176) consisting of ...

fusarium head blight (fhb) caused by fusarium graminearum is a serious disease of wheat (triticum aestivum l.), through which grain quality losses are induced by fungal trichotecene mycotoxins such as deoxynivalenol (don). a class of plasma membrane localized abc transporter proteins related to the yeast pdr5 (pleiotropic drug resistance5) efflux pump seems to be responsible for partial resista...

Cereal Chem. 77(5):535–540 Observations in 1997 indicated a significant reduction in kernel bulk density and head rice yield of rice cultivar LaGrue due to blast (Pyricularia grisea). A more detailed study on rice cultivar M202 in 1998 confirmed such observations but it also showed negative effects of blast on other physical properties of rice. Rough rice from blast-infected panicles was drier ...

Fungi colonizing senescent chickpea (Cicer arietinum) stems and postharvest debris from Pullman, WA, were enumerated and identified with the objective of finding species potentially useful for biological control of Didymella rabiei (conidial state 1⁄4 Ascochyta rabiei), causal agent of Ascochyta blight. In addition to D. rabiei, primary colonizers were, in order of decreasing abundance, Alterna...

A field experiment was conducted to compare the effectiveness of microbial control agents and chemical pesticides when used on field tomatoes. Treatments included all combinations of chemical, biological or no control of either diseases or insect pests. Irrigation problems prevented uniform development of the crop in the field, and caused one experimental block to have significantly lower yield...

Aspects of the susceptibility of English walnu~ to infection by Xanthomonas campestris pv. juglandis, the bacterium which causes walnut blight, were investigated. Leaves of 15 mature English walnut trees were inoculated with the bacterium which causes walnut blight, and after 35 days each cultivar was rated for infection severity. During the following dormant season, the buds associated with th...

Improving host resistance to late blight (Phytophthora infestans) has been a major concern of potato breeders since the Irish famine 1840s. Since then, number resistant (Solanum tuberosum L.) cultivars have developed using both conventional and molecular techniques. However, did not last long broke down due emergence more virulent races Phytophthora infestans. This perspective paper presents st...

among 160 samples collected from rice paddy of the guilan province including rice plant, seed, rhizospher, paddy's soil, paddy's water and sclerotium of the causal agent of rice sheath blight (rhizoctonia solani), 610 bacterial strains were isolated. 71 bacterial strains (11.64%) had the ability of inhibition mycelial growth fungus in dual culture test on pda medium. according to two characteri...