Entomocidal effects of beech apricot, Labramia bojeri, seed extract on a soybean pest, the velvetbean moth, Anticarsia gemmatalis, and its enzymatic activity.
The effects of the beech apricot, Labramia bojeri A. de Candolle (Sapotales: Sapotaceae), seed aqueous extract on the larval development of the velvetbean moth, Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), was evaluated. The extract inhibited larval development, pupal weight, and survival and emergence of adults. Digestive proteolytic activity in larval midgut and feces extracts was determined. Larvae fed 10 g/L of the aqueous extract showed a significant reduction in trypsin activity (~64%), when compared with control larvae. Trypsin and chymotrypsin activities were also detected in fecal material in aqueous-extract-fed larvae, with about ~4.5 times more trypsin activity than the controls. The results from dietary utilization experiments with A. gemmatalis larvae showed a reduction in the efficiency of conversion of ingested food and digested food and an increase in approximate digestibility and metabolic cost. The effect of the extract suggests the potential use of L. bojeri seeds to inhibit the development of A. gemmatalis via oral exposure. The L. bojeri extract can be an alternative to other methods of control.
Laboratório de Purificação de Proteínas e suas Funções Biológicas, Depto. De Tecnologia de Alimentos e Saúde Pública, Naturais, Universidade Federal de Mato Grosso do Sul, CP 549, CEP 79070-900, Campo Grande, MS, Brazil bioplant@terra.com.br.
Maria L R
ML
Macedo
Laboratório de Purificação de Proteínas e suas Funções Biológicas, Depto. De Tecnologia de Alimentos e Saúde Pública, Naturais, Universidade Federal de Mato Grosso do Sul, CP 549, CEP 79070-900, Campo Grande, MS, Brazil contato@vereshop.com.br.
Carlos E G
CE
Kubo
Laboratório de Química e Biomoléculas, Centro de Pesquisas, ISECENSA, Campos dos Goytacazes-RJ, Brazil; 3 USP/ESALQ -Departamento de Entomologia e Acarologia, CP 09 - 13418-900, Piracicaba, SP, Brazil maria.freire@terra.com.br.
Maria G M
MG
Freire
Laboratório de Purificação de Proteínas e suas Funções Biológicas, Depto. De Tecnologia de Alimentos e Saúde Pública, Naturais, Universidade Federal de Mato Grosso do Sul, CP 549, CEP 79070-900, Campo Grande, MS, Brazil roberto_tuca@yahoo.com.br.
Roberto T A
RT
Júnior
Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Entomologia. Av. Pádua Dias, 11, 13418-900 -Piracicaba, SP, Brasil jrpparra@usp.br.
José R P
JR
Parra
D000818:Animals; D007300:Insect Control; D007306:Insecticides / Q000737:chemistry / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development; D009036:Moths / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development; D029632:Sapotaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D013025:Glycine max / Q000254:growth & development
D007306:Insecticides; D010936:Plant Extracts
action mechanism; insecticidal; larval survival; nutritional index; velvetbean; weight reduction