Distribution of Rhopalosiphum padi on seedlings of two winter wheat cultivars and its effects on leaf characteristics
1997
Havlickova, H. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic). Odbor Rostlinolekarstvi)
The distribution of Rhopalosiphum padi and the influence of aphids on physiological characteristics of leaves of young plants of the winter wheat cultivars Regina and Zdar were studied. Plants cultivated in growth chambers were infested by apterous adults of R. padi at the second leaf stage. After twelve days, at the fourth leaf stage, the distributions of aphids on the plants, and their effects on leaf area, fresh and dry weight and chlorophyll content were evaluated. Aphid feeding influenced negatively all leaf characteristics tested. Differences between cultivars in the degree of infestation and response to aphid feeding showed a lower suitability for and higher tolerance to aphids in Regina compared to Zdar.
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