Some Methods of Trapping Plant Lice

Abstract

Screens constructed of cheese cloth and voile were tested in comparison to screens made of hardware cloth and coated with tanglefoot. The latter type when developed on the style of a movable wind vane proved the most satisfactory. Eight mesh wire cloth was used and the Tanglefoot thinned by heating before being applied to the screens. The records seem to show that there are two periods of the year more dangerous than others to the crop so far as infestation with lice is concerned. Crops planted at periods when there is little wind movement of lice have an advantage over others.