Comparative toxicity of botanical and conventional pesticides against Macrosiphum rosae (Hom., Aphididae)

عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران

Majid Mahmoudi؛ Farhad Ahmand؛ Seyed Ramin Halimi؛ Sobhan Hagizadeh

Roses are very popular flowering plant grown for their beauty. Macrosiphum rosae (L.) (Hom., Aphididae) is one of the most important pests of rose plants. Aphids cluster on the flower buds, shoot tips and young foliage causing aesthetic damage. Botanical pesticides are recommended to use against landscape plant pests for their low toxicity to human and environment. In this study toxicity of two botanical pesticides, Palizin® (insecticidal soap containing coconut) and Tondexir® (mixture of pepper and garlic extracts) and a conventional pesticide, imidacloprid (Confidor 350 SC 35%), were evaluated against the second stage of M. rosae under laboratory conditions (25±2°C, 65±5% R.H. and 16L: 8D h). A leaf dip assay was used to measure pesticide toxicity. LC50 value was estimated as 355.08 ppm for Tondexir, 230.55 ppm for Palizin and 39.21 ppm for imidacloprid. Although the results showed that the toxicity of imidacloprid is higher than Tondexir and Palizin, the advantages of botanical pesticides should be tacked into account. Considering that botanical pesticides are safer to human and environment health, compared to conventional insecticides, these two botanical pesticides could be helpful in M. rosae management programs.

toxicity؛ Macrosiphum rosae؛ insecticidal soap؛ Imidacloprid؛ rose