Biologia de Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) em Algodoeiro de Fibra Colorida Tratado com Silício

Alex Antônio Silva, Roberta Alvarenga, Jair Campos Moraes, Eliana Alcantra

Abstract


A lagarta Spodoptera frugiperda (Smith) é praga-chave da cultura do milho e a cada ano sua ocorrência na cultura algodoeira têm aumentado, causando danos severos desde a fase de plântula até a maturação. Objetivou-se com este trabalho avaliar o efeito do silício na biologia de S. frugiperda em algodoeiro de fibra branca e colorida. Os bioensaios foram conduzidos com duas cultivares de algodão, a BRS Cedro (fibras brancas) e BRS Verde (fibras verdes), com e sem aplicação de silício. O silício foi aplicado como solução de ácido silícico a 1 %, na dosagem equivalente a 3 t/ha de SiO2. Avaliaram-se os seguintes parâmetros biológicos: mortalidade larval, duração da fase larval e pupal, viabilidade de pupa, peso das pupas, razão sexual, longevidade dos adultos, machos e fêmeas e o número de ovos/fêmea. Verificou-se que a aplicação de silício aumentou apenas a mortalidade de lagartas alimentadas com folhas da BRS Cedro, não demonstrando nenhum efeito nas lagartas quando aplicado na BRS Verde. Além disso, na cultivar BRS Cedro, em comparação com a cultivar BRS Verde, houve menor peso de pupa e menor produção de ovos/fêmea.


Biology of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in Colored Cotton Treated with Silicon


Abstract. The caterpillar Spodoptera frugiperda (Smith) is a key pest of the corn culture and each year its occurrence in the cotton culture has increased, causing severe damage from the seedling phase to maturation. The objective of this work was to evaluate the effect of the silicon on the biology of S. frugiperda in white and colored fiber cotton plants. The bioassays were conducted with two cultivars of cotton, BRS Cedro (white fibers) and BRS Verde (green fibers), with and without silicon application. The silicon was applied as a solution of 1% silicon acid, at a dosage equivalent to 3 ton/ha of SiO2. The following biological parameters were evaluated: larval mortality, duration of the larval and pupal phase, pupal viability, pupal weight, gender ratio, adult longevity of males and females and the number of eggs/female. It was verified that the silicon application only increased the mortality of caterpillars fed with BRS Cedro leaves, not demonstrating any effect on the caterpillars when applied on BRS Verde. Furthermore, the BRS Cedro cultivar, when compared to the BRS Verde cultivar, presented a lower pupal weight and a lower eggs/female production.


Keywords


Gossypium hirsutum; Insecta; MIP; Resistência Induzida; Induced Resistance; Insecta; IPM

Refbacks

  • There are currently no refbacks.




Copyright (c)



Qualis Capes

EntomoBrasilis received B3 Interdisciplinary, B4 in Agrarian Sciences I, Environmental Sciences, Teaching and Collective Health, B5 in Biotechnology, Education and Zootechnics / Coastal Resources, in the evaluation of the QUALIS system of CAPES updated in 2016. The complete evaluation is here.

Open Access Articles

|    License Agreement    |     Instructions to authors (PDF)   |    Periodic Project   |   Privacy Policy    |    Currículo Lattes (Search)    |   Scielo     |     Periodicals related to Entomology and their abbreviations     |      Ortografa!

Indexers:

Latindex   |   SEER/IBICT     |    Dialnet     |    Agrobase - Literatura Agrícola     |   Sumários de Revistas Brasileiras     |     DOAJ     |    CABI Abstracts     |    LivRe!       |   RCAAP   |    Diadorim    |    Electronic Journals Library   | Eletronic Journals Index  |   Fonte Acadêmica - EBSCO  |   ZooBank    |   Zoological Records    |   Agro Unitau    |    BASE (Bielfield Academic Search Engine)    

Other sources:

   WorldCat    |     Mendeley     |     Google Acadêmico    |    Qualis CAPES    

Copyright © 2008-2019, Entomologistas do Brasil

The technical reviews and scientific and even personal, contained in articles and scientific papers published in EntomoBrasilis are full responsibility of their respective authors.

 

EntomoBrasilis. ISSN Online 1983-0572 doi: 10.12741

 

Website hosted free on HostingZone

We are affiliated to ABEC (Associação Brasileira de Editores Científicos)

We are affiliated to Periódicos CAPES

 

Support