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Nine of flax genotypes were tested in Etay El-Baroud Agric. Res. Station, ARC, Egypt, in 20010/11and 2011/12 winter seasons to study their morphological manifestations and insect infection of some flax genotypes. Comparisons among genotypes, also, were made to find out their variability in seed yield and its components. All genotypes were tested in lab. before planting for standard germination, accelerated ageing, electric conductivity, seedling growth and chemical characters.Giza8 genotype gave the highest dry weight / plant after 75 and 90 days from sowing, while, S 533/39/5/11 was the lowest genotype, at harvesting time, Giza 8 genotype was superior over all flax genotypes in total plant height, technical stem length, and fiber yield /faddan. While, S413/1/3/2 ranked first, regarding such characters, with the exception of seed yield and its components. S533/39/5/11was superior in oil %, compared to the genotypes under study. Phenotypic and genotypic variance recorded high estimates in seed yield / faddan, number of seeds/plant, oil yield / faddan, fiber yield / faddan and was slightly high in total plant height. On the other hand, straw yield / faddan and seed yield per plant had the lowest estimates. Heritability values, in broad sense, were high in magnitude for seed oil percentage, 1000 seed weight, total plant height and oil yield / faddan. While, number of capsules and seeds/plant and seed yield/plant showed higher levels of expected genetic advance from selecting the top 5% of superior individuals.   . Also, during seasons of experimentati Six genotype were chosen to evaluated of infestation with the aphids, Green bug Nezara viridula L. and the mean percentage of infestation by The cereal tortrix moth Cnephasia sp. The mean values of infested by three insects showed that, the genotype Escalina was the most significant susceptible to aphids infestation followed by Sakha2 ,Giza8, Marlir, Sakha1 and Sakha3. Also Escalina genotype was the most significant susceptible to Green bug N. viridula followed by Giza8, Sakha1 , Sakha2, Sakha3, and Marlin more over than, Escalina genotype was higher percentage of infestation by The cereal tortrix moth Cnephasia sp. followed by Giza8, Sakha1, Sakha3, Marlin and Sakha2. Moreover than, non significant correlation were found in three insect infestation with six genotypes on yield components. Except in case of % Oil with N. viridula which showed negative correlation

ESTIMATION OF MORPHOLOGICAL, TECHNOLOGICAL AND INSECT INFECTION CHARACTERS OF SOME FLAX GENOTYPES