Abstract:
Many pests are found in
apple tree plantations, causing important
damages if chemical treatments are not
applied. One of these pests is San José scale
(Quadraspidiotus perniciosus Comst),
which is a key pest of apple tree plantations,
found on the list of quarantine pests. Its
appearance in apple tree plantations is
tightly related to the climatic conditions,
especially to temperature. This has a
determining role in the pest evolution,
which may lead to major damages or even
to tree death. During 2005-2007, at the Fruit
Growing Research and Development Station
of Iaşi, we carried out investigations on the
efficiency of some insecticides for the
chemical control of San José scale
(Quadraspidiotus perniciosus Comst). The
trial was conducted at the Sîrca Farm, in an
apple tree plantation (Idared Variety). We
have tested the following products of plant
protection, some of them being of the latest
generation: Fyfanon 50 EC at a rate of
0.225%, Novadim 40 EC – 0.2% Reldan 40
EC-0.15%, Calypso 480 SC – 0.02%,
Ecalux S – 0.1% and Pyrinex 48 EC –
0.02%. The tested insecticides belonged to
the group of organophosphoric products and
of inhibitors of insect metamorphosis.
