| efficacy of repeated trickle applications of oxalic acid in syrup for varroosis control in apis mellifera: influence of meteorological conditions and presence of brood. | oxalic acid field trails for the control of varroosis (varroa destructor) were carried out in an apiary located on the mt. imittos (attica, greece). the colonies received four successive applications (approximately one every 16 days) with 4.2% oxalic acid (oa) and 60% sugar solution by trickling method with two alternative types of syringes (an automatic self-filling dosing and a single-use) from the broodright to broodless period. the results indicate that the first three applications (from 6th ... | 2007 | 17624673 |