Integrated weed management of rice in Cuba.
A total of 351 weed species were identified in different rice growing areas of Cuba, greatest yield reduction (70%) occurring with 200 plants/m2 of Echinochloa crus-galli. In a separate trial, Ischaemum rugosum was shown to be more competitive to rice than E. crus-galli or E. colona [E. colonum]. Integrated methods for controlling the most harmful weeds are listed, e.g. for Leptochloa fascicularis good land levelling, application of pre-em. thiobencarb or oxadiazon, and post-em. propanil + thiobencarb are recommended; for red rice herbicide application before sowing is recommended; for Thalia genicularis [Thalia geniculata] post-em. applications of 2,4-D are recommended; for Luziola spruceana dry land preparation followed by the application of propanil + carbaryl before sowing are recommended; for E. colonum and E. crus-galli shallow land preparation using a harrow, good land levelling and application of pre-em. thiobencarb or oxadiazon, or post-em. propanil are recommended. The use of certificate rice seed is recommended to prevent reinfestation.