Abstract
The field experiments were conducted during the summer of 1985 to determine the degree of winter wheat resistance to the grain aphid Sitobion avenae. Asta, Grana, and Saga cultivars were generally more resistant than Dana, Liwilla, and Emika. The resistance mechanism involved both antixenosis and antibiosis. Grana was least preferred during aphid migration. Asta, Saga, and, to a lesser extent, Grana had an antibiotic effect on growth and development of the apterous aphids (longer prereproductive period, lower fecundity and lower values of the intrinsic rate of increase, rm, during the first days of reproduction). Moreover, var. Asta showed a “secondary antixenosis” during colonization of ears due to the presence of awns.
Résumé
Les é preuves de champs pendant l’été de 1985 pour déterminer des niveaux de la résistance du bléd’hiver a l’aphidé du grain Sitobion avenae. Des certains niveaux de la résistance ont été détectés chez trois de six cultivars étudiés: Asta, Grana et Saga. En général, leur résistance avait tout les deux caractères: d’antixenose et d’antibiose. Les blés résistants indiquaient aussi des certaines différences. Grana a été moin préféré pendant les migrations des aphidés. Les variété Asta et Saga aussi bien qù a’ un de’ dre’ plus bas Grana un effect antibiotique fort au accroissement et au development des aphidés aptères (la période préproductive plus longue, la fécondité plus basse et la valeur plus basse de rm pour les premiers jours de la réproduction). En outre, Asta a montré “l’antixenose secondaire” en période de colonisation des épis portant des arêtes.
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Leszczynski, B. Winter Wheat Resistance to the Grain Aphid Sitobion avenae (Fabr.) (Homoptera, Aphididae). Int J Trop Insect Sci 8, 251–254 (1987). https://doi.org/10.1017/S174275840000730X
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DOI: https://doi.org/10.1017/S174275840000730X