Field tests of several mixtures of abamectin and other insecticides for controlling Liriomyza sativae.
A field experiment was conducted in Qingzhou in Shandong Province, China, to control L. sativae by several mixtures of abamectin and 1% abamectin EC (control 1) and 10% cypermethrin EC (control 2). The mixtures of 1% abamectin EC plus 20% fenvalerate EC or 10% cypermethrin had significant residual effects and fast results compared with single applications. As calculated on the basis of active ingredients for control of L. sativae, 19% fenvalerate-abamectin EC at 9.5 g/mu, 15% fenvalerate-abamectin EC-1 at 7.5 g/mu, and fenvalerate-abamectin EC-2 at 7.5 g/mu controlled 85.17-90.55, 86.20-88.97, and 85.90-86.97%, respectively. The use of 10% fenvalerate-abamectin EC-1 at 5 g/mu and 10% fenvalerate-abamectin EC-2 at 5 g/mu resulted in 83.65-87.36 and 82.58-87.66% control 3-11 days after spraying, respectively. The efficacy of the above treatments was better than single applications in the same period. Control by all treatments was better than that of abamectin (control 1) 3 days after application, but significantly lower than that of abamectin 7-10 days after application, except for 19% fenvalerate-abamectin EC. [1 mu=0.067 ha].