Abstract
A study was conducted under glasshouse conditions to determine the most effective method of infesting Convolvulus arvensis L. with the mite Aceria malherbae (Acari: Eriophyidae). Seven treatments were included with nine replications: 50, 150 and 200 individuals manually transferred; stems infested with 3, 5 and 7 galls and a non-treated control. A number of infested stems and galls per plant were evaluated. One hundred and fifty individuals manually transferred was the best treatment for both variables. A high correlation (R2 = 0.969) between infested stems and galls per plant was found.