SURVEILLANCE STUDIES ON SOME PARASITOIDS ATTACKING THE SOFT SCALE INSECT, Pulvinaria psidii MASK INFESTING GUAVA TREES. | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 1, Volume 30, Issue 9, September 2005, Page 5597-2606 PDF (113.51 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2005.239012 | ||||
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| Author | ||||
| Hala A.K. EI-Serafi | ||||
| Economic Entomology Department, Faculty of Agriculture, Mansoura University. Mansoura 35516, Egypt | ||||
| Abstract | ||||
| The present experiments were earned out in the farm of Agriculturat Research Center. Faculty of Agriculture. Mansoura University on guava trees during the two successive years 2001 and 2002 at Mansoura district. This study aimed to give some ccotoqlcal information about the dominant primary parasitoids attacking the soft scale insect. Pu/vinan'a psidii Mask on guava trees. . The obtained results revealed that there were live primary parasitoids belonging to three Families (Aphelinidae. Encyrtidae. and Eulophidae) attacking P. psidii nymphs and adults. These primary parasitoids were identified as; Encarsia ci(nna Craw. Oiversinervus e/egans Silv .. Metaphycus Ilevus How .. Microterys navus How. and Tetrestichus ceropteste« Gir. The most dominant species one was D. e/agans as it formed 44.75% of the total catch in 2001 and 52.46% in 2002. The lowest species was Microterys navus (9.47 and 9.10%) in 2001 and 2002. Two peaks of parasitism were recorded in the first year of study for E. ciuin» attacking P. psidii nymphs. These peaks were found in the end of January (4.9%) and in the end of August (6.2%). while during the second year. the highest density of E. ciuin« was recorded. in the end of January. in the first week of July, in the end of August and in the second week of November. Hi9hly significant positive correlation were found between numbers of P. psidii nymphs versus E. citnns (r ;: 0.568 and 0.689 in 2001 and 2002. On the other hand. live peaks of parasitism on P. p < /em>sidii adults were recorded during the two years of study. The parasitism showed highly Si9nificant correlation with P. psidii adults in 2001 and 2002 as 'r' values were 0.776 and 0.766. Based on simple linear regression between the number of P. psidii adults and the percentage of parasitism. there were positive strong relationship during the two years of study. | ||||
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