Show synthetic resin proves control for red spider BERKELEY an unexpected laboratory discovery made during investigation vesti gation of an entirely unrelated subject at the university of california college of agriculture has resulted in discovery of a new weapon for use in controlling red spider red spider attacks hundreds of different plants grown both in the greenhouse and in the field the new insecticide which has proven so effective in controlling the pest is a synthetic resin alkyd resin drs P A ark and C M tompkins of the plant pathology division discovered its remarkable efficiency fici ency or control of red spiders A 2 per cent solution of the resin in water applied to plants heavily infested with red spider was found to kill adults and also eggs wi within t hin five days many of the insecticides used for control of red spider ha have ve proved ineffective T TW rv w |