Articles
EVALUATION OF TWO AGRICULTURE DETERGENTS AS CONTROL ALTERNATIVES FOR GREEN PEACH APHID AND TWOSPOTTED SPIDERMITE, TWO PESTS AFFECTING PEACH ORCHARDS IN CHILE
Article number
713_59
Pages
405 – 408
Language
English
Abstract
Pesticide activity of the agricultural detergents SU-120 and Tecsa® Fruta were evaluated on Tetranychus urticae (Koch) and Myzus persicae (Sulzer). Several concentrations of SU-120 were applied onto nymphs I and II, and adult M. persicae in Petri dishes in a Potter tower.
For Tecsa® Fruta, the aphids were submerged in a musseline cloth in the solutions.
Mortality (no motility) was measured in both cases at 24 h.
On T. urticae, mortality was evaluated on eggs and adult females adhered to a double sided scotch tape on glass slides, which were submerged 5 s in several concentrations, let to dry 15 min, and taken to 27°C and 70% RH. Mortality of females and eggs was evaluated at 24 and 144 h, respectively.
Both detergents showed a direct relationship between concentration and mortality of the two species.
SU-120 at 2.5% caused near 70% mortality on M. persicae adults and nymphs.
Tecsa® Fruta at ≥5% on adults obtained ≥85% mortality, and on nymphs, ≥2.5% solutions caused >70% mortality.
SU-120 had a greater effect than Tecsa® Fruta to control eggs and adult T. urticae females.
Best control was obtained with both products on adult females, which required ~ 1.5-2.3x less detergent to reach the LC50. Detergents are an interesting alternative to control these polyphagous pests.
For Tecsa® Fruta, the aphids were submerged in a musseline cloth in the solutions.
Mortality (no motility) was measured in both cases at 24 h.
On T. urticae, mortality was evaluated on eggs and adult females adhered to a double sided scotch tape on glass slides, which were submerged 5 s in several concentrations, let to dry 15 min, and taken to 27°C and 70% RH. Mortality of females and eggs was evaluated at 24 and 144 h, respectively.
Both detergents showed a direct relationship between concentration and mortality of the two species.
SU-120 at 2.5% caused near 70% mortality on M. persicae adults and nymphs.
Tecsa® Fruta at ≥5% on adults obtained ≥85% mortality, and on nymphs, ≥2.5% solutions caused >70% mortality.
SU-120 had a greater effect than Tecsa® Fruta to control eggs and adult T. urticae females.
Best control was obtained with both products on adult females, which required ~ 1.5-2.3x less detergent to reach the LC50. Detergents are an interesting alternative to control these polyphagous pests.
Publication
Authors
T. Curkovic, J. Araya, C. Canales, A. Medina
Keywords
agricultural detergents, Myzus persicae, SU-120, TecsaFruta, Tetranychus urticae
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