Grapevine mealybug, control strategies in Trentino.
This paper presents the results of several trials conducted in 2009-14 in Italy to test different control strategies against the grapevine mealybug (Planococcus ficus), an introduced species in Trentino, which can cause direct damage (limiting production) and indirect (virus transmission) on the crop. Spirotetramat and buprofezin were found effective in controlling the pest in pre- and post-flowering periods (spirotetramat currently authorized only in post-flowering). Particularly interesting results are also obtained with the use of postharvest spirotetramat to limit the pest population in the following spring. Observations on mutualistic relationship between the mealybug and ant species are also mentioned.