Evaluation of some plant extracts and conventional insecticides against Trialeurodes vaporariorum (Westwood) (Homoptera: Aleyrodidae) in greenhouse condition

Abstract :

The influence of methanolic extracts (at 80 mg/mL) of Melia azedarach L. (Meliaceae) and Peganum harmala L. (Zygophyllaceae) as well as commercial insecticides (at the maximum label-recommended rate) were conducted against pupa of Trialeurodes vaporariorum Westwood (Aleyrodidae) in greenhouse. The plant extracts and the insecticides were sprayed on the plants with the maximal amount of pupa (Ca. 90%). The control plants were treated with the distilled water. During two steps, the numbers of adult emergence were recorded. All the chemical products have exhibited significantly reduction effect on mean numbers of adult emergence as compare with the control treatments. The extracts of M. azedarach and P. harmala had the most effects on decrease percentage of adults population as compared with neem oil, abamectin and acetamiprid in the first record with a mean of 92.21% and 90.26%, respectively. The highest mean reduction percentage of the population was calculated in the P. harmala treatments (92.21%) during the last record

Keyword :

Trialeurodes vaporariorum, methanolic plant extract, Melia azedarach, Peganum harmala, commercial insecticides, adults population

Author(s) : Dehghani, M., Ahmadi, K., Zohdi, H.
Downloads : 1924
Published Issue : 2012 Vol. 7 Number 2

2012 Vol. 7 Number 2