LABORATORY BIOASSAY AND FIELD CONTROL STUDIES ON BEMISIA TABACI(HOMOPTERA: ALEYRODIDAE) IN EGYPT | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 9, Volume 85, Issue 1, March 2007, Page 101-116 PDF (3.81 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2007.211322 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| ELSAUD M. E. KHALAFALLA; SAMIRA H. METRI; ALY M. A. NASSEF | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| The pesticides Furathiocarb (Deltanet), Pirimiphos-methyl (Actellic), Tedifol (Kelthane "Dicofor+Tedion), insect growth regulator (IGR) Buprofezin (Applaud), fungus Biofly (Beau✓atia bassiana), mineral oils KZ and Schocrona, liquid detergents Nastabon and Oct and natural vegetative oil were evaluated for their efficacy for control of fiemisia tabaci (Genn.) (Homoptera: Aleyrodidae) under laboratory 'and field conditions. Laboratory bioassay tests on adults showed highest toxicity effect resulted from Buprofezin, followed by the vegetative oil, Pirimiphos-methyl, and C, then Furathiocarb, Tedifol, and Schocrona. Pirimiphosmethyl, vegetative oil, and IQ were the most effective compounds on eggs, Furathiocarb, Schocrona, and Nastabon were less effective. Furathiocarb showed the highest toxicity on larvae followed by Schocrona and the vegetative oil whereas Buprofezin and detergents had low toxicity. Pupae were considerably less susceptible to the tested toxicants except Furathiocarb. IGRs had no direct toxicity. Apart from detergents, pesticides or their alternatives showed considerable latent effect with the highest effectiveness with Buprofesin. Furathiocarb was potentiated by the natural vegetative oil, detergent, and strongly by the mineral oils. Pronounced potentiation was observed when mixing Tedifol with mineral oils, natural vegetative oil, and detergents. The biocontrol agent greatly reduced egg hatching, pupation, and adult emergence. Field experiments indicated that apart from Pirimiphosmethyl, Furathiocarb or Tedifol were poorly effective against adults or immature stages infesting cotton or squash. The IGR (Buprofezin) had faint efficacy against adults, but considerable effect was noticed against immature stages on cotton and squash. Mineral or vegetative oils gave satisfactory reduction against adults or immature stages. Although oils had no residual toxicity, they suppressed the insect for two weeks. For soap, good control were obtained against larvae and pupae but moderate efficacy of detergents was obtained against eggs. Mixing alternatives with Furathiocarb greatly improved the efficacy of this compound against adults or immature stages. | ||||
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