پارازيت هاي خارجي زنبوران عسل )MESOTIGMATA:VARROIDAE( VARROA DESTRUETOR APISMELLIFERAL A.AND T. مقايسه دو روش استعمال اسيد اگزاليك در كنترل كنه واروآ

Comparison of two Application Methods of the Oxalic Acid in Control of Varrao Mite, Varroa destructor A. &T. , Ectoparasite of Honey Bees, Apis mellifera L.

In this program, effect of oxalic acid, 3.5%, and two application methods of this compound were studied. Fifteen infested honey bee colonies with varroa mite, Varroa destructor A.&ʹ1ʹ., were chosen. These colonies were divided to 3 treatments and 5 replications , which treated with dehydrate oxalic acid. 3.5%, per liter sugar syrup 1:1 using spray and trickling methods. The control group didnʹt receive any chemicals or drugs . Results showed that oxalic acid has a high potential for control of varroa mites in Iran. especially in low temperature. The average mite mortalities were 98.59 , 95.19 and 6.48% for spray , trickling methods and control . respectively. Average mortality in the first and second treatments were not significantly different . but they had significant difference with the control (P< 0.05 ). Also, the comparison between two methods showed that mite mortality were 97% and 3% in spray method. and 55% and 54% in trickling method during the first and second time of application . respectively. Therefore, we needed only one and/or two applications of oxalic acid, 3.5%, in spray and trickling methods. respectively .