PERSISTENCE OF LEBAYCID AND MALATHION RESIDUES ON AND IN SUGER-BEET PLANTS.

Hegazy, M. E. A.; Shokr, Sh. A. A.; Abu-zahw, M. M.; Salem, R. M.; Basuni, A . A.

doi:10.21608/jppp.2002.253438

PERSISTENCE OF LEBAYCID AND MALATHION RESIDUES ON AND IN SUGER-BEET PLANTS.

Document Type : Original Article

Authors

¹ Central Agricultural Pesticides Laboratory Agricultural Research Center, Dokki-Giza, Egypt.

² Plant Protection Institute. Agricultural Research Center, Dokki-Giza, Egypt.

³ Sugar Crops Research Institute. Agricultural Research Center, Dokki- Giza, Egypt.

10.21608/jppp.2002.253438

Abstract

These studies were carried out to investigate the residual behaviour of lebaycid and malathion organophosphorus insecticides on sugar-beet (vegetative parts and roots) plants. Determined residue half-life values (RL50) in vegetative parts were 14.4 and 14.7 hours for lebaycid and malathion , respectively.
In vegetative parts, the initial amount detected of lebaycid (5.04 ppm) was less than the initial amount found of malathion (40.90 ppm), while the initial concentration was undetected in sugar-beet roots for each of lebaycid and malathion. The vegetative parts did not have any detectable residues of lebaycid and malathion after 9 and 20 days from application, respectively. No detectable amount of lebaycid and malathion residues were found in the roots all days after treatment. So sugar-beet roots treated with each of the two tested insecticides could be used safely in sugar industry