Ka. Seaton et al., THE EFFECTIVENESS OF A RANGE OF INSECTICIDES AGAINST WESTERN FLOWER THRIPS (FRANKLINIELLA-OCCIDENTALIS) (THYSANOPTERA, THRIPIDAE) ON CUT FLOWERS, Australian Journal of Agricultural Research, 48(6), 1997, pp. 781-787
Three insecticide spray trials were conducted on field calendulas and
chrysanthemums to test the effectiveness of 10 insecticides against we
stern flower thrips (Frankliniella occidentalis). The efficacy of each
insecticide was assessed between 1 and 11 days post-spraying. Methami
dophos was the most effective insecticide, followed to a lesser extent
by dichlorvos, lambda-cyhalothrin, fluvalinate, and maldison. Apart f
rom methamidophos, insecticides were generally less than 50% effective
at 3 or more days post-spraying. In a separate trial, 5 insecticides
were applied as drenches to the soil of pots in which carnations infes
ted with F. occidentalis were grown. The pots were placed in thrips co
ntainment cages and adult thrips emerging from the soil were caught on
sticky traps. Parathion-methyl and chlorpyrifos reduced thrips emerge
nce from soil by 90-95%.