Hickel, E.R., Peruzzo, E.L., & Schuck, E. 2001 Control of the Ground-Pearl Eurhizococcus brasiliensis (Hempel) (Homoptera: Margarodidae) with chemigation.. Neotropical Entomology 30(1): 125-132.

Notes: The ground-pearl Eurhizococcus brasiliensis (Hempel) (Homoptera: Margarodidae) is the main pest of vineyards in Southern Brazil. The normal pest control strategies do not affect the pest population because the insects are in the underground and develop a resistant form like a cyst. With the aim to apply the chemigation for the control of ground-pearl, an assay was carried out in the laboratory. Tubes of 50 mm of PVC tubes (150 mm phi ) were cut and received a screen cover in one circular side. The tubes were then filled with natural soil, collected at Videira Experimental Station. Five tubes were put on the top of each other to form a test tube with distinct soil depths. Cysts of ground-pearl were put in the depths of 100 mm and 200 mm. The treatments were aldicarb 0.525 g i.a./plant (as a standard), metidathion 80 ml a.i./100 l, diazinon 90 ml a.i./100 l, imidacloprid 21 g a.i./100 l and destiled water (as an untreated control). The liquid insecticides and the water were applied as a surface drench at a rate of 20 l/m super(2). The best control was achieved with metidathion, resulting in 83.3% mortality after five months. Diazinon and imidacloprid resulted in 45.2% and 6.0% mortality respectively, while aldicarb resulted only in 1.2% mortality.