Study of the efficacy of different concentrations of insecticidal soap, in comparison Oxydemeton – methyl (Metasystox) to control Aphis gossypii in greenhouse cucumber.
2007
Bani A`meri, Vali Ol-Lah
Insecticidal soaps have been used to control insects and mites because of low toxicity and environmental pollution with no residual effect. At present time, because of limitation in the use of chemical insecticides in greenhouse vegetables, it is needed to use an alternative product without poisoning active ingredient such as soaps. In this study, the effect of an insecticide soap named PALIZIN (Kimia Sabz Avar product) with three different concentrations (1.5, 2.5 and 5 gr/lit), Oxydemeton – methyl (Metasystox) (1 ml/lit.) and control were evaluated through a Completely Randomized Block Design in 3 replications against Aphis gossypii in greenhouse cucumber. Mortality percentage was calculated using Henderson-Tilton formulae and the arcsine transformed mortality percentage of aphids were analyzed by SAS software. The comparison of the mean effectiveness of all treatments showed that there was no significant difference among treatments, but there is a significant difference with control. The maximum and minimum mean effect of insecticide soap were 90.63 and 75.89 percent in concentrations of 2.5 and 1.5 gr/lit, respectively. According to the results, insecticidal soap (PALIZIN) is recommended in 1.5 - 2 gr/lit. for spraying application.
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