نتایج جستجو برای: antixenosis
تعداد نتایج: 125 فیلتر نتایج به سال:
evaluation of mechanisms of barley genotypes tolerance and antixenosis schizaphis graminum (rondani)
schizaphis graminum (rondani) (hem.: aphididae) is one of the seriously injurious pestsof cereals particularly of barley. the population of the pest has beenon the increase in recentyears. besides chemical control, another practically suitable method of controlling the pest isthe use of resistant barley genotypes. in this research, 47 advanced lines along with 13 cultivarswere screened in their...
Objectives: The objectives of this study were to confirm the existence and heritability of mirid resistance in selected promising cocoa genotypes and to determine whether antixenosis is involved in the mechanism of resistance. Methodology and results: Ten cocoa hybrids obtained from crosses between clones identified as susceptible or promising for resistance to the cocoa mirid, Sahlbergella sin...
Experiments were conducted to identify and characterize host plant resistance to bird cherry-oat aphid, Rhopalosiphum padi (L.), in various wheat and wheat-grass hybrids. Initial tests screened for resistance to R. padi among 12 grass accessions (eight wheat [Triticum aestivum L.], three triticale [XTriticosecale Wittmack], and 1XElytricum [Elytrigia elongata [Host] Nevski x Triticum aestivum h...
Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) has a global distribution and is one of the most important post-harvest pests maize (Zea mays L.). Some Mexican races could be novel source resistance against S. to improve commercial maize, generating lines, varieties, hybrids with pest. These are original from center origin have been exposed selection pressure other for thousands years,...
Date palm, phoenix dactylifera l. (arecales: arecaeae) is the most important crop of the arabian Peninsula. the Kingdom of Saudi arabia is among the top 3 date producing countries of the world estimated to have over 400 date palm cultivars of which 25 are important and yield 1.3 million tons of dates annually. the red palm weevil (RPW) Rhynchophorus ferrugineus (olivier) (Coleoptera: Curculioni...
The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is an invasive insect pest of soybean [Glycine max (L.)Merr. (Fabaceae)] in North America, and it has led to extensive insecticide use in northern soybean-growing regions there. Host plant resistance is one potential alternative strategy for managing soybean aphid. Several Rag genes that show antibiosis and antixenosis to soybe...
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