Impact of tomato wastes pyrolysis liquid against potato whitefly Bemisia tabaci (Hemiptera : Aleyrodidae)‎

Abstract EN

Slow pyrolysis of tomato wastes, at temperature of 350 °C results form of Light Pyrolysis Liquid (LPL), which has further separation into aqueous fractions and organic layer.

Fourier Transform Infrared spectroscopy (FTIR) was submitted to identify the component of each fraction.

It demonstrated the presence of acetic acid, 1-amino-2-propanol, cresol, dimethoxyphenol, pyrogallic and anthracene.

Toxicological experiment for every fraction was compared with the commercial formulations of thiamethoxam aganist the 2nd Instar nymphs of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) pots trial.

The result demonstrated that there was no significant differences between reduction percentages by using LPL and thiamethoxam.

Consequently, biological evaluation test experiment was carried out by measuring reduction percentage of the adult stage of B.

tabaci on potato plant spunta cv to study the effect of both Light Pyrolysis Liquid and thiamethoxam , the initial kill exceed after three days of application for LPL which reached 84.35% than after one day of application which was 73.9%.

For instance, thiamethoxam initial kill reached 74% after three days of application.

Subsequently, the residual effect was found to be 85.46 and 73.35 % for LPL and thiamethoxam, respectively.

Our results concluded that, it can be used in integrated pest management as biopesticide as it results from plant by- product.

Otherwise, there is a continues need for the development of new agrochemical products to provide growers with tools needed to address pest control problems specifically, reducing the risk on resistance development as it has a new mode of action due to presence of mixture compounds.