PARASITE COMPLEX OF THE SUGAR BEET MINING MOTH, SCROMPALPA OCELLATELLA BOYD. (LEPIDOPTERA: GELECHIIDAE) ON SUGAR BEET IN EGYPT | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 10, Volume 86, Issue 4, December 2008, Page 1283-1295 PDF (3 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2008.209764 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| SAMIR A. EL-SERWY | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| During 2005, sugar beet leaves infested with Scrobiparpa ocelbtella Boyd (Lepidoptera: Gelechiidae) were collected from untreated fields at Sakha (Kafr El-Sheikh Governorate), at Shirbin (Daciahlyia Governorate) and at Fayoum (Fayoum Governorate). In this work, five parasitoid species (Hymenoptera: Chalcidoidea) were identified: the predominant species Agathis sp. (Braconidae) and the four newly recorded species: Opius sp. , Alysia sp. (Braconidae), Diadegrna oranginator Aub. (Ichneumonidae) and Pachyaepoideus wndemmiae(Rondani (Pteromalidae). Parasitism activity, in general, started at the second half of April and continued till the first of December. In the same time, the first records for Agathis sp. at Sakha followed with those of P. vindemmiae at the fourth week of the same month then those of Opius sp. and D. oranginator species at the second week of May. The last records were for Alysia sp. at 4th week of May. Level of parasitism, regardless of species, fluctuated dearly according to the region , with a mean of 17.9% and range 10- 50% at Sakha, a mean of 16.3% and range 27.3- 45.5% at Shirbin and 8.4% at Fayoum. Also, Sakha represented the most favorable environment for the host as well as the parasitoids. While total number of S. acerbic/la was 951 moths and that of wasps was 208, these numbers were 41 & 8 and 65 & 6 only at Shirbin and Fayoum, respectively. Synchronization was found between timing of moths and wasps peaks. Agathis sp., especially at Sakha was the most abundant, represented 51.3% of the total populations of all parasitoids followed by 0. oranginator (21.2%) and P. vinclemmiae (19.8%). The parasite complex completed by the lowest numbers of Alysia sp. (1.4%) and Opiussp. (6.3%). Agathis sp. was the most promising parasitoid as a biological agent for controlling the sugar beet moth in Egypt | ||||
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