Comparación de estadios larvales de Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) mediante longitud de cápsula cefálica y distancia entre setas frontales

摘要: espanolEl gusano del maiz Helicoverpa zea es de una importancia agricola relevante debido al dano que provoca en los cultivos y afines, situacion esta directa relacion con determinados estadios su ciclo larval. Fueron colectadas larvas tres regiones Chile; norte Arica, centro San Clemente el sur correspondiendo a Angol, para determinar las diferencias larvales por medio ancho la capsula cefalica distancia entre setas frontales. Los resultados acusaron estadisticas significativas Chile determinaron cefalicas variable mas precisa diferenciacion EnglishThe corn earworm Heliothis has relevant agricultural importance because of the damage it causes in and other farms, direct relation to determined larval instars; effective control will be related knowledge biology. Larvae from northern, central southern were obtained establish comparisons for definition specific instar measuring width cephalic capsule distance between frontal setae (DFS); these structures present progressive increase length proportional instar. The results indicated significant differences among latitudes that DFS is better predictor than head capsule. environmental variables could implied conditioning lengths by are discussed as projection