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Determination of economic injury threshold for aphids in spring barley

L. Hansen | 1991

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Establishing control threshold for bird cherry-oat aphid (Rhopalosiphum padi L.) in spring barley (Hordeum vulgare L.) by aphid-days

L. Hansen | 2000

In Denmark, farmers are recommended to spray against aphids in spring barley fields at very low densities. Moreover, about 50% of the spring barley fields are treated with insecticides annually, when only about 25% need this control. In order to[...]

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Oscillatory rheometry of starch-water systems: effect of starch concentration and temperature

L. Hansen ; R. Hoseney ; J. Faubion | 1991

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