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- Title
Parasitoids of the Tortoise Beetle, Cassida vittata Vill. (Coleoptera: Chrsomylidae) in Sugar, Fodder and Table Beet and Effect of Leaf Phenols on Parasitoid Density.
- Authors
Hendawy, A. S.; El-Fakharany, S. K. M.
- Abstract
Field experiments were conducted for 3 seasons (2013/14 - 2015/16) on 3 types of sugar, fodder and table beet sown at the Experimental Farm of Sakha Agricultural Research Station, Kafr El-Sheikh, Egypt. The hymenopterous parasitoids, Monorthochaeta nigra Blood (Trichogrammatidae) emerged from Cassida vittata Vill. eggs and Aprostocetus sp. (Eulophidae) emerged its pupae. The high population density of M. nigra was detected in May (2013/14 and 2014/15) and April (2015/16) on the 3 sugar beet crops. The high population density of Aprostocetus sp. was recorded in May on all beet crops. The seasonal parasitism rate of M. nigra was the highest (19.31%) on C. vittata eggs, collected from sugar beet, followed by table beet (13.61%) and then fodder beet (13.26%). On the other hand, seasonal parasitism rate of Aprostocetus sp. was the highest (17.09%) on C. vittata pupae, collected from table beet, followed by that collected from sugar beet (10.07%) and then the fodder beet (8.17%). Almost, C. vittata egg population correlated positively and significantly with M. nigra population. This correlation was insignificant, but mostly positive between C. vittata pupae and parasitism rate of Aprostocetus sp. on all beet crops. Activity of M. nigra correlated positively with total phenols %, but this correlation was negative in case of Aprostocetus sp.
- Subjects
PARASITOIDS; TORTOISE beetles; FODDER crops; PHENOL content of food; PARASITISM
- Publication
Egyptian Journal of Biological Pest Control, 2017, Vol 27, Issue 2, p149
- ISSN
1110-1768
- Publication type
Article