Effects of weeds on fecundity and survival of Leptocorisa oratorius (Hemiptera: Alydidae).
Adults of Leptocorisa oratorius preferred Echinochloa crus-galli to rice var. IR 36 for resting sites, whereas rice was preferred to Eleusine indica, Echinochloa colonum, Brachiaria mutica, Paspalum conjugatum, P. paspalodes [P. distichum] and Digitaria ciliaris. L. oratorius oviposited on all plant species, but those confined for 8 days on flowering rice laid more eggs than those confined on weeds. Females began oviposition 2 weeks after moulting, and fecundity was consistent for 5 weeks. Nymphs completed their development only on E. crus-galli, E. colonum, D. ciliaris or rice after panicle emergence. The results indicate that weed control is an important factor in L. oratorius management programmes.