Description

Abstract: The abundance of adults of Elasmopalpus lignosellus in field crops in northern Florida was studied in 1982-84 using pheromone traps. The trap captures revealed that the temporal pattern of abundance differed for each crop. Multiple generations occurred in groundnut and grain sorghum fields, with adults in abundance during both vegetative and reproductive crop-growth stages. Adults were abundant in soyabean fields only during the vegetative and early reproductive crop-growth stages, with captures comprising individuals of two generations. Adults were abundant in wheat fields only during early seedling stages, while few adults were collected at any time in maize fields. There was rarely any considerable overlap between adult populations of different generations. The temporal patterns and magnitudes of adult captures were similar in fields of the same crop planted on about the same date but dissimilar in fields of different crops or fields of the same crop planted on different dates