Mısırlarda zarar yapan Mısırkurdu ( Ostrinia nubilalis Hbn.)'nun neden olduğu ürün kayıpları üzerinde çalışmalar.

Abstract

This study was carried out during 1990-1993 in Samsun to determine the crop losses caused by European corn borer ( Ostrinia nubilalis Hbn.) which is a key pest of corn borer in the Black sea region. The experiments were 4x3 factorial in randomized complete black design with 4 treatments (currently sprayed + two sprayings + one spraying and unsprayed ) and 3 replications in first two years, with 4 treatments and 4 replications in last two years. Hybrid maize varieties TMP-2 (Karadeniz Yildizi), TTM-813 and a local variety which are widely grown in the region were planted in separate plots. The different rates of infestations were made by different numbers of sprayings and the relationship between yield and rates of infestation was determined by plot yields at these levels of infestations. The result indicated that the correlation between yield loss and infestation levels was significant and negative. An infestation at a level of 80% resulted in 21.9, 31.3 and 29.7% yield loss in Karadeniz Yildizi, local, TTM-813 maize varieties, respectively. There was a significant and relative correlation between yield loss and number of holes caused by European corn borer. Yield loss per hole was 8.0% in Karadeniz.Yidizi, 6.8% in local variety and 7.1% in TTM-813.