DISTRIBUTION OF EUROPEAN WITHIN - MAIZE PLANTS OF HYBRIDS CORN BORER LARVAE SOME SINGLE CROfS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 2, Volume 28, Issue 6, June 2003, Page 5053-5060 PDF (871.76 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2003.244698 | ||||
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| Authors | ||||
| A. S. Metwally,; A. A. Barakat | ||||
| Plant Protection Research Institute Field Crops Research Instlt te Agricultural Research Center I Giza, Egypt | ||||
| Abstract | ||||
| The field experiments were conducted at Gemmeiza Agricultural Rese1rCh Station to study the European corn borer (ECB ) .Ostrinia nubi/o/Is ( Hbn.)distnbu ion within planls of sever, maize Slngie cross hybrids, Stalk d~mage , as ·rndi.::dlc, by cavity length and grain yield :edllc!lons were also estimu:t'd .TO attempt trus w Ik. an artifICial infestalion was done when Ihe plants aged 45 days. The obtained 9ata revealed that the majorily of larvae fed mainly on plant leaves and more than !F% died within 6 days after egg hatching. Larval distribution on tassels and ears depends only on maize plant development stages, so il differs from cullivar 10 another. few larvae (2.1%) started to bore into Internodes through 9 days of egg hal ching 'and increased gradually to 94.2 % after 35 days . Most of larvae on leaves a'1d in internodes tended to distribule in the middle part of pIal'll ( around ear zone) With highly aggregation especially in the first instars . The damage In stems ,as indic~ted by cavily length differed according to the hybrid and reached maximum at the blister stage of developmenl ( plants aged 63-80 days) . Single cross hybrids 124 , so122 and sc~55 seemed 10 be more susceptible to the ECa infestation, more larvaejand more damage to sIems and grain yield ( 20.4 - 24,8 % ) . The other hybrids werej the leasl susceptible to the infestation, more than 95 % as larval mortality within 3 days after egg hatching and the least stalk damage and grain yield reduction (9.S - 13.1%). | ||||
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