search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 73, No. 2, 2013, pp. 122-127
Bioline Code: cj13018
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 73, No. 2, 2013, pp. 122-127

 en Impact of insecticides used to control Spodoptera frugiperda check for this species in other resources (J.E. Smith) in corn on survival, sex ratio, and reproduction of Trichogramma pretiosum check for this species in other resources Riley offspring
Souza, Jander R.; Carvalho, Geraldo A.; Moura, Alexandre P.; Couto, Marcelo H.G. & Maia, Jader B.

Abstract

Corn ( Zea mays check for this species in other resources L.) is cultivated in large areas and considered one of the world’s major cereal crops. There are several arthropod pests that can reduce its production such as the fall armyworm, Spodoptera frugiperda check for this species in other resources (J.E. Smith) (Lep.: Noctuidae), which is considered to be the main pest for corn. Fall armyworm is primarily controlled by insecticides. The use of biological control agents to manage this pest is growing with an emphasis on the egg parasitoid Trichogramma pretiosum check for this species in other resources Riley (Hym.: Trichogrammatidae). Thus, the aim of this research was to evaluate the impact of the following insecticides (g ai L-1) beta-cypermethrin (0.03), chlorfenapyr (0.60), chlorpyrifos (0.96), spinosad (0.16), etofenprox (0.10), triflumuron (0.08), alfa-cypermethrin/teflubenzuron (0.0425/0.0425), and lambda-cyhalothrin/thiamethoxam (0.11/0.083) on survival, sex ratio, reproduction, and T. pretiosum offspring. Distilled water was used as a control. Commercial insecticide formulations were diluted in distilled water. Bioassays used Anagasta kuehniella eggs treated with insecticides which were afterwards exposed to parasitism. Bioassays were conducted under controlled conditions at 25 ±2 ° C, 70 ± 10% RH, and 12:12 h photoperiod. Alfa-cypermethrin/teflubenzuron, beta-cypermethrin, chlorpyrifos, chlorfenapyr, spinosad, etofenprox, and lambda-cyhalothrin/thiamethoxam reduced parasitism capacity of maternal generation females as well as the percentage of insect emergence from the F1 generation. Only triflumuron was selective for T. pretiosum and can be recommended along with this parasitoid in fall armyworm management programs in corn.

Keywords
Integrated pest management, parasitoid, selectivity, triflumuron, Zea mays

 
© Copyright 2013 - CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
Alternative site location: http://www.inia.cl

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2017, Site last up-dated on 05-Dec-2017.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil