Über das Auftreten von Individualunterschieden beim Ringelspinner, Malacosoma neustria (L.)

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Abstract
Summary: Larvae of Malacosoma neustria (L.) were examined as regards their behaviour towards light stimuli. As a result, two forms could be distinguished which behaved differently in a light gradient.The development of the larvae at different temperatures showed that the two larval types had different temperature ranges.Hungry larvae of the two forms showed different activity and endurance in searching for food.The two forms differed in their susceptibility to infection with Bacillus thuringensis Berliner showing a mortality of 73% in one case against 33% in the other.From the results it appears desirable to pay more attention in the future to qualitative differences in the individuals of a species.