Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Studies on the use of dry heat to decontaminate niger seed (Guizotia abyssinica) infested with dodder seed (Cuscuta sp.

Abstract

In the USA, the seed devitalization effect of dry heat (90 or 100degC), steam (93-99degC), microwaves (2450 MHz), ethylene oxide or propylene oxide on seeds of the dodder species Cuscuta campestris and Cuscuta indecora was studied to determine a method to kill the seeds of these noxious weeds in nigerseed shipments. Steam of 99degC for 1.75 h or dry heat of 100degC for 4 h resulted in zero dodder germination. Microwaves and fumigation did not completely devitalize the dodder seed. Heat treatment seems to be an effective treatment of nigerseed contaminated with dodder seed. KEYWORDS: TROPAG | Cuscuta | Guizotia abyssinica | Post Harvest Operations | nigerseed | noxious weeds | Cuscuta | post harvest treatment | plant quarantine | import regulations | weed control | USA (Mainland).