Ovicidal and larvicidal effectiveness of insecticides applied by dipping apples on the small fruit tortrix Grapholita lobarzewskii.
The larvicidal and ovicidal effectiveness of twelve insecticides on Grapholita lobarzewskii Nowicki was tested by dipping apples in different concentrations of the insecticides. Emamectin was the most effective larvicidal product, with an LC(50) of 0.01 mg kg(-1), closely followed by spinosad, methoxyfenozide and chlorpyrifos-methyl, with LC(50) values between 0.2 and 0.7 mg kg(-1). Products like imidacloprid, indoxacarb, phosmet and thiacloprid gave LC(50) values between 1 and 2 mg kg(-1). Lastly, chlorpyrifos-ethyl and phosalone had LC(50) values of around 4 mg kg(-1), whereas tebufenozide and diflubenzuron had almost no larvicidal effect. Most of the products tested had low ovicidal effectiveness, and only fenoxycarb and emamectin gave LC(50) values worthy of note, close to 2 mg kg(-1).
Charmillot
Pierre-Joseph
PJ
Agroscope Changins-Wädenswil Research Station ACW, CH-1260 Nyon, Switzerland. pierre-joseph.charmillot@acw.admin.ch
Pasquier
Denis
D
Salamin
Charlotte
C
Ter-Hovannesyan
Asya
A
D000818:Animals; D005638:Fruit / Q000469:parasitology; D007306:Insecticides; D007814:Larva; D007928:Lethal Dose 50; D027845:Malus / Q000469:parasitology; D009036:Moths; D010063:Ovum
D007306:Insecticides