Evaluation of Herbicides for Chemical Weed Control in Lily Bulbs Production

MARINANGELI PABLO; LÓPEZ CASTRO, RAMÓN; FACCHINETTI, CECILIA; REINOSO, LUCIO; IRIGOYEN, JORGE; CURVETTO, NÉSTOR

WEED TECHNOLOGY

WEED SCI SOC AMER

Lugar: Laurence, KS; Año: 2010 vol. 24 p. 483 - 488

0890-037X

Information on the chemical weed control in lily bulb production in South America is scarce. Greenhouse and field studies were conducted to evaluate the phytotoxic effect and weed control of pre- and postemergence herbicides in lily bulb production in Argentina. In greenhouse studies, bromoxynil, 415.2 g ai/ha; fluroxypyr, 200 g ai/ha; metsulfuron, 3 g ai/ha; iodosulfuron-methyl-sodium, 3 g ai/ha + metsulfuron, 3 g ai/ha; oxyfluorfen, 240 g ai/ha; ioxynil, 528.75 g ai/ha; and linuron, 750 g ai/ha produced severe phytotoxicity and/or death of 1ily bulbs. Glyphosate, 720 g ai/ha, were safe to lily. Aclonifen, 720 g ai/ha produced little to no symptoms. In field conditions, pre-emergence herbicides metolachlor, 960 g ai/ha + atrazine, 1500 g ai/ha and metolachlor, 960 g ai/ha + flumetsulam 80 g ai/ha provided good weed control but were phytotoxic for lily plants with chlorosis as the main symptom. Metolachlor plus linuron produced little or no symptoms with no reduction in bulb yield. Diuron, 800 g ai/ha at postemergence was the most effective treatement without phytotoxicity, and in combination with metolachlor, 960 g ai/ha + linuron, 750 g ai/ha at pre-emergence controlled weeds until 40 days after diuron application, without yield reduction. Results obtained with glyphosate indicate that the Lilium genus presents some tolerance to this herbicide, which justifies further evaluation for weed control in lily bulb production. Lilium genus presents some tolerance to this herbicide, which justifies further evaluation for weed control in lily bulb production.