Comparison between Directed and whole tree spraying by different natural control agents in reducing the populations of fig scale insect, Resseliopsis pustulans on apple trees | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 20, Issue 1, 2012, Pages 31-48 PDF (12.43 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2012.462315 | ||
| Authors | ||
| Shabaan M. Abd-Rabou* ; Nadia A. Ali; Ashraf A. H. Mangoud | ||
| Plant Protection Research Institute, Dokki, Giza 12618, Egypt. | ||
| Abstract | ||
| The efficacy of four natural control agents (Bio-ovar, Bio-ranza, Neem Azal and Super Misrona oil) as well as with Sumithion were tested against the fig scale insect, Resselliopsis pustulans (Homoptera: Asterolecaniidae) and its parasitoid, Metaphycus sp. on apple trees in Gharbia Governorate on 15th April during two successive seasons (2008 and 2009). In these trials, the whole tree spraying was compared with the directed spraying (spraying of trunk and main branches). In the first season (2008), Bio-ovar, Bio-Ranza, NeemAzal and Super Misrona oil agents gave moderate reduction on nymphs, non-gravid and gravid females also gave moderate toxicity on parasitoids. On the other hand, Sumithion gave highly average reduction to all stages of scale insect and its parasitoid. The whole tree spraying trail gave similar results to those obtained from the directed spray trail. About 7.5 liters of spraying volume per apple tree was sufficient to cover these parts, while about 20 liters of spraying volume per tree were sufficient to complete cover the whole tree. The results that obtained in second year (2009) were similar to those obtained from 2008 season. | ||
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