| Insecticidalactivity of Tageteserecta L. methanolextracts on beanweevil, Acanthoscelidesobtectus (Say)(Coleoptera: Bruchidae) |
| Paper ID : 1159-3IICE (R2) |
| Authors: |
|
Dürdane Yanar *1, Kürşat Acar2 1Plant Protection, Faculty of Agriculture, Gaziosmanpasa University, Tokat, Turkey 2Gaziosmanpaşa University Faculty of Agriculture Plant Protection Department Tokat Turkey |
| Abstract: |
| The indiscriminate use of pesticides in agriculture can cause high levels of toxic residues in food, biological imbalance, environmental pollution, intoxication of humans/animals, and other direct and indirect effects. The use of plant extracts as an alternative insecticides is a way to minimize the problems caused by synthetic insecticides. T ageteserecta L. have larvicidal, antimicrobial, nematicidal and insecticidal activities. Therefore, in the present study, the insecticidal efficacy of crude methanol extracts of T ageteserecta flowers and leaves against bean weevil,Acanthoscelid esobtectus was studied at concentrations of 0.5%, 5%, 10%, 25% and 50% by using seed and insect dipping methods. The adult mortality was assessed 24, 72, 120 and 168 hours after treatment. The results revealed that the crude methanol extracts of T.erecta leaves showed the highest insecticidal activity than the flower extract in both testing methods. The mortalities were 100 and 88.3% in leaf and flower extracts at 50% concentration with seed dipping method 72 hours after treatment,respectively. The mortality rate increased with increas in g concentrations of the extracts and 100% mortality was observed in leaves extract at %50 concentration after 72 hours with seed dipping method. Theseeddippingmethodwasmoreeffectivethantheinsectdippingmethod.Themortalityrateswere 100 and 76.7% withseedandinsectdippingmethods, respectively, at 72 hoursaftertreatment in leafextract.Furtherstudiesareneededtoidentifytheactiveingredients of theextractresponsibleforinsecticidalactivity. |
| Keywords: |
| Tageteserecta,flowers, leaves, Acanthoscelides, methanolextract, insceticidalactivity |
| Status : Paper Accepted |
