Effect of wetting agents on some biological activity of alum soluble powder formulations against Aphis craccivora.

Azza Mohamed,Ashraf El-Kady

doi:10.21608/eajbsa.2010.15211

Abstract

Laboratory tests were conducted to assess the insecticidal activity of Alum salt and its formulation, A1 (Alum+ Tween) and A2 (Alum +sodium dodecyl sulphate {SDS}) against Aphis craccivora stages under laboratory condition. The insecticidal effect of Alum was noticed as slight affect at 2, 4, and 6 hours of treatments in case of nymphs, adults and winged stage respectively where as it increased gradually to record the highest activity after 12 hours. Soluble powder formulations of Alum were more effective than Alum alone. This indication was noticed as increasing in effectiveness without any changes in behavior of activity. The effectiveness of formulated Alum soluble powder was affected by the type of wetting agent that used in formulated preparations. A2 formulation (Alum +SDS) was more effective than A1 formulation (Alum +Tween) against all stages at all exposure periods.

Highlights

Sucking insects like aphids can affect plant growth production by different ways (Schepers, 1988)
The extensive use of insecticides has led to widespread development of resistance in many insect species (Wordlow et al, 1976; Devonshire, 1989 and Weichel, et al 2003)
In the past 50 years more than 500 arthropods species has become resistant to the toxicological action of insecticides and this include more than 20 resistant aphid species (Georghiou,1990).So, in this work, the purpose was studying the efficiency of Alum and its formulations as a possible sources of alternative insecticides to determine its efficacy to control the insect

Summary

Introduction

Sucking insects like aphids can affect plant growth production by different ways (Schepers, 1988). A) Tested chemical: Alum as a formulated soluble powder, (SP 90 %) was prepared according to method described with El- kady (2008). Insecticidal activity of Alum against different stages of Aphis craccivora was studied under laboratory conditions.

Results

Conclusion