Associação de pós vegetais e Bacillus thuringiensis para o controle de Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae)

• Ano de defesa: 2015
• Autor(a) principal: Alencar, Rafael Vido de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Brasil; Programa de Pós-Graduação em Zootecnia; UTFPR
• Palavras-chave em Português: Aves - Criação; Pragas - Controle; Bacillus thuringiensis; Aviculture; Pests - Control; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL; Ciências Agrárias
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/2382

The most important insect pest in the global poultry production is Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae), known as avian mealworm. This insect can be vector of pathogens, thus its presence in poultry houses results in several losses to the productive chain, such as reduction of weight gain and damages of carcasses. The control A. diaperinus is done mainly with synthetic chemicals that are harmful to the environment, leave residues in the meat and contaminate the workers. Therefore, new alternative of controls that minimize impacts related to productivity and the environment are needed. The objective of this study was to evaluate the effect of vegetable powders, Bacillus thuringiensis and their association upon A. diaperinus larvae and adults at laboratory conditions. Three B. thuringiensis strains have been tested, ips82, br147 and br81, at concentration of 3x108 colony forming unit/ml added to poultry food. The mixture was divided in five acrylic dishes with 12 wells each and 20 larvae or adults of A. diaperinus were allocated in each well. Plants used for vegetable powders were rue, surinam cherry, mint and orange at concentration of 20%. The powders (20g) were added and mixed to 80g of sterilized feed for chickens. The mixture was divided in five parts and added to Petri dishes, where 20 larvae or adults of A. diaperinus were allocated in each replicate. The association of methods consisted in preparing suspensions of B. thuringiensis strains, br81, ips82 and br147 at the concentration of 3x108 spores/ml to the vegetable powder (5%) included in 22.8g of commercial feed for chicken. The mealworm mortality was assessed in all experiments for 10 days. Surinam cherry extract caused 63.73% accumulated mortality of the mealworm larvae, differing from the other extracts. As for mortality of adults, surinam cherry and orange presented 70% and 61.55% respectively with significant difference from the control. The three B. thuringiensis strains differed significantly from the control group for larvae cumulative mortality resulting respectively in 60%, 55% and 61.66%, whereas control group was only 15%. No significant differences were observed for adults. The association of methods presented significant larvae mortality when compared to the control, but only treatment 3 (br81 + 5% surinam cherry extract) presented over than 55% mortality. Treatment 2 (ips 82 + 5% surinam cherry extract) caused significant mortality in adults. Therefore, B. thuringiensis associated with vegetable powders at the described concentrations and associations showed insecticidal effect on larvae and adults of A. diaperinus.