The lethal effects of fineleaf fumitory, Fumaria parviflora (Lam.) (Fumariaceae) extracted by several methods on Bemisia tabaci (Genn.)

The sweet potato whitefly, Bemisia tabaci (Genn.) (Biotype A) (Hem: Aleyrodidae) is a major pest of field crops, vegetables and ornamental plants. In this research, the effect of several extraction methods (percolation, maceration, sonication, water bath and soxhlet) on mortality effect offine leaved fumitory, Fumaria parviflora on adults of Bemisia tabaci with leaf dip test were studied. Methanol 3% were used as negative control treatment respectively and tomato as host plant. The calculated LC50 value for above extraction methods were 54.78, 85.04, 85.18, 139.33 and 344.69 g/l respectively and dosage-response gradient was estimated 1.34 ±0.30, 1.08±0.28, 1.0 ± 0.26, 1.39±0.43 and 0.92±0.20 respectively. The results showed that percolation plant extract of F. parviflora had the highest mortality on adult of B. tabaci. It seems that the percolationmethod is the best method to extract chemical compounds to be used against the cotton whitefly. Using this extactct may be a useful strategy against the pest in Integrated Pest Management.