Efficacy of Natural Compounds on The Pear Psylla, Cacopsylla pyricola (Hemiptera: Psyllidae), The Olive Scale Insect, Parlatoria oleae (Hemiptera: Diaspididae) and Their Natural Enemies in Pear Orchards in Egypt | ||||
| Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
| Article 17, Volume 7, Issue 1, December 2015, Page 145-152 PDF (333.83 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsf.2015.17249 | ||||
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| Author | ||||
| Nadia Aly | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza | ||||
| Abstract | ||||
| Recently, the pear psylla, Cacopsylla pyricola (Förster) (Hemiptera : Psyllidae) and the olive scale insect, Parlatoria oleae (Colvee) (Hemiptera: Diaspididae) are the most important pests on pear trees in different locations in Egypt. The main purpose of this investigation is to investigate the effect of some different natural control compounds on the pear psylla, the olive scale and their natural enemies on pear trees in Ismailia and Gharbia Governorates throughout May and October 2013-2014, respectively. In the first season results indicated that, ,the four compounds (Jojoba oil, Peacilomyces fumosoroseus, Azadrachtin and Verticellium lecanii) gave moderate toxic effect against C. pyricola population nymphs and its predator, Orius laevigatus (Fieber) (Hemiptera: Anthocoridae). Mineral oil and Sulphur compounds gave 78.6% and 74.9 % and 70.3 % and 66.9 %of C. pyricola populations nymphs and its predator, O. laevigatus, respectively. On the other hand, Malathion gave high efficacy against nymphs of C. pyricola (88.0%) and its predator, O. laevigatus (82.5%). In the second season, the results indicated the same trend to which obtained in the first year. While, in the first season, for P. oleae populations and its parasitoid, Aphytis lingnanensis Compere (Hymenoptera:Aphelinidae) the results indicated that, the above mentioned gave moderate toxic effect . Mineral oil and Sulphur compounds gave 77.7 % & 73.9% and 70.2 % and 66.2 %% of P. oleae populations and its parasitoid, A. lingnanensis, respectively. While, Malathion gave high efficacy against P. oleae populations (87.0%) and its parasitoid, A. lingnanensis (82.9%) . In the second season, the results indicated that the same trend to the first year. It could concluded that treatments with Jojoba oil , P. fumosoroseus, Azadrachtin and V. lecanii gave moderate effect of the pear psylla and the olive scale and their natural enemies (parasitoid and predator), when comparing with Mineral oil, Sulphur and Malathion. This conclusion will be help in integrated pest management program of the two pests infested pear in Gharbia and Ismailia, Governorates. | ||||
| Keywords | ||||
| Natural compounds; the pear psylla; Cacopsylla pyricola; Egypt | ||||
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