首页|EFFICACY OF SPIROTETRAMAT IN THE CONTROL OF PEAR PSYLLA (Cacopsylla pyri L.) ON PEAR TREESIN POLAND
EFFICACY OF SPIROTETRAMAT IN THE CONTROL OF PEAR PSYLLA (Cacopsylla pyri L.) ON PEAR TREESIN POLAND
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NSTL
The effectiveness of spirotetramat in the control of pear psylla (Cacopsylla pyri) on pear trees was investigated in five field experiments, carried out in years 2009-2011. One or two treatments were applied in June; the first treatment in the early stage of larvae hatching from eggs deposited by females from the summer generation, whilst the second application was carried out about two weeks later. In all the experiments, spirotetramat as Movento 100 SC applied at a dose of 2.25 1/ha effectively reduced the pest population after only a single application (total reduction of larvae after one week post-treatment 75.3-91.4%, and 83.7-97.6% at two weeks post-treatment). Movento 100 SC applied after a single application at a lower dose of 1.8 1/ha had aslightly worse effect (the total reduction of larvae at one week post-treatment was at the level of 58.4-91.3%, and two weeks after application at the level of 56-92.6%) - but in this case only a few larvae at stages L4 and L5 were found on pear shoots.The effectiveness of spirotetramat at both doses after two applications was very high.
NSTL
