Efficacy of napropamide in controlling weeds in grape and tomato

Abstract

Biological evaluation of efficacy of napropamide (RAZZA) for control of weeds in grapevine (Vitis vinifera L.) and tomato (Solanum lycopersicum L.) were conducted in 2002., on locations of Smederevska Palanka (for both grapevine and tomato), Radmilovac (grapevine) and Zemun Polje (tomato). Two application rates of napropamide were applied: 7 and 10 L/ha in grapevine, and 2,5 and 4 L/ha in tomato. The trials were conducted, and both efficacy and phytotoxicity were assessed according to the standard EPPO methods. The application rate of 2,5 L/ha showed good efficacy for the following species: Amaranthus retroflexus L., Chenopodium album L., Chenopodium hybridum L., Echinochloa crus-galli L (Beauv) and Hibiscus trionum L. Higher application rate of 4 L/ha, was efficient for both the species listed above and: Galinsoga parviflora Cav., Digitaria sanguinalis (L.)Scop, Portulaca oleracea L and Setaria viridis (L)P.B. Application rates of 7 i 10 L/ha showed good efficacy (> 90 %) for: Amaranthus retroflexus, Digitaria sanguinalis, Chenopodium album, Chenopodium hybridum, Lactuca serriola, Setaria glauca (L)P.B., Setaria viridis, Sonchus oleraceus L.em Gouan and Stellaria media (L)Vill. Low efficacy ( lt 75 %) for all application rates tested was in controlling: Agropyrum repens (L)P.B., Lepidium draba L, Cirsium arvense (L.)Scop and Convolvulus arvensis L.