[The influemce of the host plant on the weight of caterpillars, fertility and egg-laying capacity of moths of European corn borer (Ostrinia nubilalis Hbn., Lepidoptera, Pyralidae) [injurious insects, maize, hemp, sorghums, weeds]]
1984
Manojlovic, B. (Institut za zastitu bilja, Beograd (Yugoslavia))
The influence of 16 varieties of plants that were hosts to European corn borer (Ostrinia nubilalis Hbn.) on the biological properties of the pest was investigated. The following was found: -The weight of the O. nubilalis caterpillar is closely dependant on the species of the host plant. The optimum medium were maize plants, the hop and sorghum. Caterpillars from weed plants were lighter compared with those from maize, sorghum, hop and even hemp. Minimum weight of 1 caterpillar was found in nettle - 33.97 mg and maximum in maize plants - 162.38 mg. -The plants contributing to heavier weight of O. nubilalis caterpillars influenced at the same time higher laying capacity and fecundity of their butterflies. The butterflies from maize had the highest laying capacity(more than 400 eggs) and then those from hop (350 eggs). -The butterflies from maize were the most fecund and then those from hop and sorghum. -By dissection of the dead females, a larger number of unlayed eggs was found in the females having higher laying capacity and v.v. -The butterflies from weeds had lower fecundity and laying capacity than those from maize, sorghum and hop. -Generally, larger number of egg issues had the females with higher laying capacity. -Differences in the number of eggs in issues were higher in the butterflies which had neither maximum, nor minimum laying capacity, as it was the case with the butterflies from sorghum and burdock.
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