Some aspects of the biology of the European corn borer (Ostrinia nubilalis Hbn.) on sweet corn
2003
Mazurek, J. | Hurej, M. | Jackowski, J. (Wroclaw Agricultural University (Poland). Dept. of Plant Protection)
In the climatic conditions of Lower Silesia, Poland the European corn borer lays eggs on sweet corn during 3-5 week period between the 3rd decade of June and the 2nd decade of August. The eggs are laid on leaves L1 to L8 of main and lateral stems of the plants. Caterpillars start to hatch at the beginning of July, but in 1998-00 a massive hatching was observed only in the 2nd and in the 3rd decade of July, whereas in 2001 - in the 3rd decade of this month and in the 1st decade of August. Larvae are capable of migrating between plant rows on the soil surface, which was observed in 1998-00 from the end of July still the end of October. Most caterpillars migrated in the 2nd and in the 3rd decade of August and in the first days of September. The cob damage by caterpillars ranged between 31 and 46 percent. Delayed harvest caused a substantial increase in damage
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