Prevention of potato top-roll by aphicide and its effect on leaf area and photosynthesis |
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Authors: | R W GIBSON D WHITEHEAD D J AUSTIN JANE SIMKINS |
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Institution: | Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ |
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Abstract: | In a field of potatoes, top-roll, which is induced by the aphid Macrosiphum euphorbiae feeding on the leaves, was restricted to two rows of plants which accidentally received no phorate aphicide granules at planting. The photo-synthetic rate per unit leaf area and the ground cover of top-rolled leaves were respectively 50% and 20% less than those of normal plants which may account for the smaller yields of affected plants observed in previous experiments. |
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