de Villiers, E.A., & Du Toit, W.J. 1984 Uitwerking van piretroid - middels op die groenstinkbesie, Nezara viridula, by makadamianeute. [Effect of pyrethroid insecticides on the green vegetable bug, Nezara viridula, on macadamia nuts.]. Information Bulletin (Citrus and Subtropical Fruit Research Institute) (146): 17-20.
Notes: In trials at Levubu and Nelspruit in 1981, a comparison was made between cypermethrin at 20% and deltamethrin at 2.5%, each applied 2 or 3 times. The best control of N. viridula was obtained with 3 sprays of cypermethrin (on 3 November, 2 December and 22 December) which reduced the incidence of damaged nuts from 29 to 10%. This programme, however, resulted in enhanced populations of long-tailed mealybugs (Pseudococcus longispinus) at Nelspruit.