Behavioral responses of Diabrotica speciosa (Coleoptera: Chrysomelidae) larvae to CO2 and seedlings of host plants

Ciência Rural

Pereira, Tânia³  Marques, Francisco Assis¹  Ventura, Maurício Ursi² 

[1] Universidade Federal do Paraná;Universidade Estadual de Londrina, Londrina, Brasil;Universidade Estadual de Londrina, Brasil

关键词: insecta;    host plants;    semiochemicals;    attractants;    kairomones;   

DOI  :  10.1590/S0103-84782005000500001

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Responses of Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) larvae to CO2 and their behavior when exposed to host and non host plants were studied in the laboratory. First instar larvae of D. speciosa were used. In a first bioassay, larvae preferred the treatment with CO2, from the reaction of the potassium bicarbonate and acetic acid, in opposition to distillated water. When the behavior of the larvae was observed in response to host plants, a significant higher number of turns was found in corn and popcorn than in common beans, soybean, wheat and sorghum. Sorghum differed from all other treatments with a lower number of turns. Similar values were found in popcorn and corn. The greater distances ranged were found on oats in comparison to pop corn, corn, common beans and sorghum. After contact with sorghum seedlings larvae did not present searching behavior because they fell from the seedling or no movements were saw seen.

【 授权许可】

CC BY-NC