بررسي تاثير عصاره هاي آبي گياهان كندواش و آقطي روي سوسك برگخوار نارون

The Efficacy of Aqueous Plant Extracts of Wormwood and Dwarf Elder Against Elm Leaf Beetle Xanthogaleruca luteola Mull. (Col.; Chrysomellidae)

Insecticidal effect of certain weeds of Guilan flora in Iran, like Artemisia annua L. and Sumbucus ebulis L. on the first and third instar larvae, pupa and adults of elm leaf beetle were investigated under laboratory condition. The plants were dried in the shade and extracted in distilled water. The oil phase was separated with diethyl ether and ultimately the ether was evaporated in a rotary evaporator. Diluting the concentrates in acetone, resulted in desired concentrations of 1,5, and 10 percent. Each concentration considered as a treatment with three replicates using 10 individuals. In order to make comparisons two controls were used, one with acetone and another without any treatment. Mortality rates were calculated and corrected based on Abbotʹs formula. The data were subjected to statistical analysis (SAS) at %5 probability level. The results were indicative of the maximum effect of 10% concentration of both plant species and there was no difference between the larval, pupal and adult stages treated, nor between the two plant extracts in the above concentrations. The first larval instar was highy susceptible and therefore showed 100% mortality in all of the concentrations applied. The adult insect also exhibited 100% mortality in all the treatments except in 1% Sumbucus ebulus. The least mortality (3.3±2.7 and 10 ± 4.7 percent) was observed with I and 5% cncentrations of Sumbucus. The Artemisia annua extract with average 91.31% mortality showed a higher rate compared to 77.11% caused by Sumbucus extract.