Konstantinova, G.M., Kudina, Z.D., & Derevyanko, N.M. 1985 [An express method.]. Zashchita rastenii. Moscow No. 4, 29-30.

Notes: A rapid colorimetric method developed in the USSR for determining mortality of the California scale [Quadraspidiotus perniciosus] after fumigation or spraying of seedlings in orchard nurseries is described.