Articles
AN INSECTICIDE EFFECTIVENESS SCREENING METHOD ON HAZELNUT WEEVIL (CURCULIO NUCUM L. COLEOPTERA, CURCULIONIDAE) FOR FIELD AND LABORATORY STUDIES
Article number
845_70
Pages
451 – 456
Language
English
Abstract
The hazelnut weevil Curculio nucum L. is the most important pest for the French hazelnut industry (Corylus avellana). The withdrawal of active ingredient (a.i.) endosulfan at the European level in 2007 which had been used for a long time with success, then the withdrawal of carbaryl in 2008, resulted in a search for new effective active ingredients.
The method set by ANPN and used in 2005, 2006 and 2007 to test new active ingredients, is based on an original principle: first, adult weevils are gathered by hitting hazelnut tree branches over a white sheet in May in an orchard which has not been treated with an insecticide.
The weevils are kept in rearing boxes until the testing date.
Secondly, trees are treated in an orchard with chemical products in May or June then, after the mixture has dried, at least four shoots with leaves are excised and put into rearing boxes.
The test consists of putting into each box ten weevils with one treated shoot and with four replications.
The mortality of the weevils is noted after 24, 48, 72 hours and after seven days.
The results of three years tests compared with the very effective reference chemical Thionex (350 g/L of a.i. endosulfan) at 2.8 L/ha and a water treated control, showed the very good efficacy of Lannate 20L (200 g/L of a.i. methomyl) at 3.75 L/ha, of Calypso (480 g/L of a.i. thiaclopride) at 0.30 L/ha, of the association Calypso at
0.25 L/ha + Decis Protech (1,47% of a.i. deltamethrine) at 0.5 L/ha and of the product A 9584 at 0.4 kg/ha containing 25% of a.i. thiamethoxam.
The tests also showed a moderate efficacy of Sherpa 10 (100 g/L of a.i. cypermethrine) at 0.5 and 0.6 L/ha, of Dursban 75WG (75% of a.i. chlorpyriphos-ethyl) at 0.67 kg/ha and of Orytis (75 g/L of a.i. acrinathrine) at 1 L/ha and an insufficient efficacy of Trebon 30EC (295 g/L of a.i. etofenprox) at 0.6 L/ha, of Agrimec (18 g/L of a.i. abamectin) at 0,.5 L/ha, of Admiral (100 g/L of a.i. pyriproxyfene) at 0.25 L/ha and of Suprême (20,2% of a.i. acatamiprid) at 0.37 and 0.50 kg/ha.
The method used seemed to give satisfaction because the reference product resulted in a complete mortality after 48h, as did the products noted to be very effective, and that almost all the weevils stayed alive in the water control until the end of the seven days of testing.
The method set by ANPN and used in 2005, 2006 and 2007 to test new active ingredients, is based on an original principle: first, adult weevils are gathered by hitting hazelnut tree branches over a white sheet in May in an orchard which has not been treated with an insecticide.
The weevils are kept in rearing boxes until the testing date.
Secondly, trees are treated in an orchard with chemical products in May or June then, after the mixture has dried, at least four shoots with leaves are excised and put into rearing boxes.
The test consists of putting into each box ten weevils with one treated shoot and with four replications.
The mortality of the weevils is noted after 24, 48, 72 hours and after seven days.
The results of three years tests compared with the very effective reference chemical Thionex (350 g/L of a.i. endosulfan) at 2.8 L/ha and a water treated control, showed the very good efficacy of Lannate 20L (200 g/L of a.i. methomyl) at 3.75 L/ha, of Calypso (480 g/L of a.i. thiaclopride) at 0.30 L/ha, of the association Calypso at
0.25 L/ha + Decis Protech (1,47% of a.i. deltamethrine) at 0.5 L/ha and of the product A 9584 at 0.4 kg/ha containing 25% of a.i. thiamethoxam.
The tests also showed a moderate efficacy of Sherpa 10 (100 g/L of a.i. cypermethrine) at 0.5 and 0.6 L/ha, of Dursban 75WG (75% of a.i. chlorpyriphos-ethyl) at 0.67 kg/ha and of Orytis (75 g/L of a.i. acrinathrine) at 1 L/ha and an insufficient efficacy of Trebon 30EC (295 g/L of a.i. etofenprox) at 0.6 L/ha, of Agrimec (18 g/L of a.i. abamectin) at 0,.5 L/ha, of Admiral (100 g/L of a.i. pyriproxyfene) at 0.25 L/ha and of Suprême (20,2% of a.i. acatamiprid) at 0.37 and 0.50 kg/ha.
The method used seemed to give satisfaction because the reference product resulted in a complete mortality after 48h, as did the products noted to be very effective, and that almost all the weevils stayed alive in the water control until the end of the seven days of testing.
Publication
Authors
H. Breisch, J.P. Sarraquigne, E. Couturié
Keywords
hazelnut weevil, Curculio nucum, laboratory test, rearing box, insecticides
Online Articles (125)