Plant Derived Oils as Ultraviolet Protectants for the Beet Armyworm Nucleopolyhedrovirus (SeNPV)
Said El Salamouny1,2, Martin Shapiro2, Merle Shepard2
1Cairo University, Dept. of Economic Entomology and Pesticides, Egypt
Utravilolet B (UVB) from sunlight is the main constraint to using the environmentally friendly baculovirus in plant protection, especially in tropical and subtropical countries. Eleven oils emulsified with lecithin were evaluated as UV protectants to improve the persistence of the beet armyworm nucleopolyhedrovirus (SeNPV) in the laboratory. Seven of these (cotton seed, olive, flax, soybean, black seed, wheat germ and safflower) at a concentration of 1% provided UV protection compared to virus alone (with lecithin) treatment irradiation under UVB for 30 minutes in the laboratory. There was a relatively high rate of protection when plant derived materials, i.e., henna, clove, skullcap, peppermint and Marasperse® (lignin), at the concentration of 0.25%, were mixed with cotton seed oil at 1% and exposed to UVB light for 5 hours. The absorption spectra of the materials, either tested singly or in combination with plant derived materials, was reflected in the absorption spectrum, with more absorption providing more protection against UVB.
Keywords: Additives, baculovirus, oils, protectant, ultraviolet
Contact Address: Said El Salamouny, Cairo University, Dept. of Economic Entomology and Pesticides, Gamaa, 12613 Giza, Egypt, e-mail: said_elsalamounyagr.cu.edu.eg