EI-Salamouny,, S. (2004). EFFECT OF CERTAIN OPTICAL BRIGHTENERS ON THE SUSCEPTIBILITY OF Spodopter. littoral/s (BOISDUVAL) (LEPIDOPTERA: NOCTUIDAE) TO A BACULOVIRUS: EFFECT ON SOME BIOLOGICAL ASPECTS. Journal of Plant Protection and Pathology, 29(5), 2873-2886. doi: 10.21608/jppp.2004.239720
S. EI-Salamouny,. "EFFECT OF CERTAIN OPTICAL BRIGHTENERS ON THE SUSCEPTIBILITY OF Spodopter. littoral/s (BOISDUVAL) (LEPIDOPTERA: NOCTUIDAE) TO A BACULOVIRUS: EFFECT ON SOME BIOLOGICAL ASPECTS". Journal of Plant Protection and Pathology, 29, 5, 2004, 2873-2886. doi: 10.21608/jppp.2004.239720
EI-Salamouny,, S. (2004). 'EFFECT OF CERTAIN OPTICAL BRIGHTENERS ON THE SUSCEPTIBILITY OF Spodopter. littoral/s (BOISDUVAL) (LEPIDOPTERA: NOCTUIDAE) TO A BACULOVIRUS: EFFECT ON SOME BIOLOGICAL ASPECTS', Journal of Plant Protection and Pathology, 29(5), pp. 2873-2886. doi: 10.21608/jppp.2004.239720
EI-Salamouny,, S. EFFECT OF CERTAIN OPTICAL BRIGHTENERS ON THE SUSCEPTIBILITY OF Spodopter. littoral/s (BOISDUVAL) (LEPIDOPTERA: NOCTUIDAE) TO A BACULOVIRUS: EFFECT ON SOME BIOLOGICAL ASPECTS. Journal of Plant Protection and Pathology, 2004; 29(5): 2873-2886. doi: 10.21608/jppp.2004.239720
EFFECT OF CERTAIN OPTICAL BRIGHTENERS ON THE SUSCEPTIBILITY OF Spodopter. littoral/s (BOISDUVAL) (LEPIDOPTERA: NOCTUIDAE) TO A BACULOVIRUS: EFFECT ON SOME BIOLOGICAL ASPECTS
Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, 12813-Glzl, Egypt
Abstract
The addition of Fluorescent brighteners al 0.1% concentration to Spodoptera littoralis nucleopolyhedrovlrus (SpIIMNPV) increased the susceptibility of S. littora/is larvse to virus. The highest rates of enhancement among the six tested optical brighteners were obtained in case of Blankophor BBH, TIn opal UNPA-GX and Blankophor HRS. LC5O'S values were sharply reduced from 1.9x10" to 2.3x1 02, 2.4x10 and 4.94x102PIB's/ml diet by 82.6, 78.2 and 38.7fold, respectively. Whereas, Blankophor RKH, Blankophor P167 and Blankophor BSU exhibited less effect than the previous three products.
Also, a reduction In the time required for killing 50% of the tested population (L T 50) was recorded with a value of 2.23 fold in case of Tinopal UNPA-GX. Effects on the larval weight, duration of larval stage, duration of pupal stage and the sex ratio of emerged moths were studied. The reduction In larval weight was correlated with a high rate of enhancement effect. The duration of the larval stage was longer in case of the brightener treatments especially with those effectiVe products. No effect could be detected on the duration of the pupal stage and sex ratio. The present study suggests the potential use of Blankophor BBH and TInopal UNPA-GX to improve the effect of SpliMNPV formulation.
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