No abstract

By a screening program searching for new pesticides from fungal sources, an insecticidal compound was isolated from Penicillium citrinum F 1539. The compound, named quinolactacide, was novel and showed 88% mortality against green peach aphids (Myzus persicae) at 250 ppm. Its structure was determined by spectroscopic techniques.

H-form Fe-silicate catalysts showed high activity and stability for the reduction of NO with propylene in the presence of a high concentration of oxygen. The catalytic activity of Fe-silicate was hardly affected by the presence of SO2.