PARASITISM OF NEZARA VIRIDULA L. EGGS UNDER FIELD CONDITIONS AT KAFR EL-SHEIKH GOVERNORATE | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 8, Volume 83, Issue 1, March 2005, Page 87-94 PDF (1.56 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2005.238040 | ||||
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| Authors | ||||
| ELSAYD M. E. KHALAFALLAH1; REFAT E. EL-SUFTY2; IBRAHIM S. EL-HAWARY2; MOHAMED A. KHATTAB1 | ||||
| 1Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| 2Faculty of Agriculture at Tanta, Tanta University, Egypt | ||||
| Abstract | ||||
| The egg parasitoids of Nezara vindula L. are of the most important factors which keep the insect well under control . Therefore, the rate of parasitism of N. viridula eggs was determined under field conditions of Kafr El-sheikh govemorate from early April to the end of October during three successive years , 1999,2000 and 2001. The obtained results showed that the parasitism started with low rate during April. The high rate of parasitism and the parasitoid emergence were recorded during June, July and August for the three years and this was synchronized with the increase of temperature. The parasitoids failed to emerge from the parasitized eggs at the low rate of parasitism . In general, the rate of parasitism was higher in the first and second year than in the third one, while the emergence rate of parasitoids was higher in the second year than in the first and third year. Trissolcus megallocephalus (Ashm.) was the only parasitoid emerged from eggs of N. yiridula However, the gained results indicate the important role of parasitoids as a bio-control agents in the integrated control programs of N. viridula. | ||||
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