Inter-relação entre doses de potássio e a eficiência de genes Bt no controle de Spodoptera frugiperda

O objetivo deste trabalho foi identificar o efeito de doses de potássio sobre a resistência transgênica Bt e os danos causados por Spodoptera frugiperda em plantas de milho, em diferentes estádios de desenvolvimento. O delineamento experimental foi de blocos ao acaso, em arranjo fatorial 3x6, com três doses de potássio (0, 45 e 90 kg ha^-1) e seis híbridos de milho (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2 e NS92VTPro), com três repetições. Os híbridos foram avaliados por meio de análise de variáveis canônicas. Com doses baixas de potássio, a eficácia dos híbridos de milho no controle da lagarta S. frugiperda diminui nos diferentes estádios fenológicos. O uso da tecnologia Bt é mais eficiente quando sob dosagem adequada de potássio de 90 kg ha^-1 KCl.

Termos para indexação
Zea mays; lagarta; danos; praga; transgênicos

Autoria

Marcelo Macedo Faria

Universidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/n^o, CEP 75780-000 Ipameri, GO, BrazilUniversidade Estadual de GoiásBrazilIpameri, GO, BrazilUniversidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/n^o, CEP 75780-000 Ipameri, GO, Brazil

http://orcid.org/0000-0002-7912-2478

Pedro Henrique Nascimento Cintra

http://orcid.org/0000-0003-0697-6277

Víctor Alves Amorim

Universidade Federal de Viçosa, Centro de Ciências Biológicas e da Saúde, Departamento de Biologia, Avenida Peter Henry Rolfs, s/n^o, Campus Universitário, CEP 36570-000 Viçosa, MG, BrazilUniversidade Federal de ViçosaBrazilViçosa, MG, BrazilUniversidade Federal de Viçosa, Centro de Ciências Biológicas e da Saúde, Departamento de Biologia, Avenida Peter Henry Rolfs, s/n^o, Campus Universitário, CEP 36570-000 Viçosa, MG, Brazil

http://orcid.org/0000-0001-6450-1865

Thiago Souza Campos

Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Ciências Agrárias, Câmpus de Jaboticabal, Via de Acesso Professor Paulo Donato Castellane, s/n^o, CEP 14884-900 Jaboticabal, SP, BrazilUniversidade Estadual Paulista Júlio de Mesquita FilhoBrazilJaboticabal, SP, BrazilUniversidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Ciências Agrárias, Câmpus de Jaboticabal, Via de Acesso Professor Paulo Donato Castellane, s/n^o, CEP 14884-900 Jaboticabal, SP, Brazil

http://orcid.org/0000-0001-9135-0070

Ednaldo Cândido Rocha

http://orcid.org/0000-0002-2554-777X

Fabricio Rodrigues Corresponding author

http://orcid.org/0000-0002-6133-6363

Corresponding author

SCIMAGO INSTITUTIONS RANKINGS

Figuras | Tabelas

Figuras (4)
Tabelas (1)

Thumbnail

Figure 1
Accumulated precipitation, relative humidity, and average temperature during the months of corn (Zea mays) cultivation in 2014/2015 and 2015/2016 crop seasons. Source: Inmet (2019)INMET. Instituto Nacional de Meteorologia. BDMEP: Banco de Dados Meteorológicos para Ensino e Pesquisa: cotação diária. Available at: <https://bdmep.inmet.gov.br/>. Accessed on: Feb. 17 2019.
https://bdmep.inmet.gov.br/... .

Thumbnail

Figure 2
Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, without the application of potassium (0 kg ha^-1 KCl), in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Thumbnail

Figure 3
Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, with the application of potassium at a rate of 45 kg ha^-1 KCl, in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Thumbnail

Figure 4
Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, with the application of potassium at a rate of 90 kg ha^-1 KCl, in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Thumbnail

Table 1
Soil chemical attributes at a 0 to 20 cm depth after limestone application in the 2014/2015 and 2015/2016 harvests⁽¹⁾.

Figure 1 Accumulated precipitation, relative humidity, and average temperature during the months of corn (Zea mays) cultivation in 2014/2015 and 2015/2016 crop seasons. Source: Inmet (2019)INMET. Instituto Nacional de Meteorologia. BDMEP: Banco de Dados Meteorológicos para Ensino e Pesquisa: cotação diária. Available at: <https://bdmep.inmet.gov.br/>. Accessed on: Feb. 17 2019.
https://bdmep.inmet.gov.br/... .

Figure 2 Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, without the application of potassium (0 kg ha^-1 KCl), in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Figure 3 Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, with the application of potassium at a rate of 45 kg ha^-1 KCl, in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Figure 4 Analysis of canonical variables by the dispersion of corn (Zea mays) hybrids, with the application of potassium at a rate of 90 kg ha^-1 KCl, in the 2014/2015 (A) and 2015/2016 (B) harvests. The evaluated hybrids and respective proteins between parenthesis were: A, 20A55Hx (Cry1F); B, 30A77PW (Cry1A.105/Cry2Ab2/Cry1F); C, AG1051 (conventional, without Cry proteins, used as the control); D, MG652PW (Cry1A.105/Cry2Ab2/Cry1F); E, NS90VTPro2 (Cry1A.105/Cry2Ab2/CP4-EPSPS); and F, NS92VTPro (Cry1A.105/Cry2Ab2). DAMG30, damage at 30 days after sowing; DAMG70, damage at 70 days after sowing; DAMG110, damage at 110 days after sowing; LCI, leaf chlorophyll index; 1000W, 1,000-grain weight; and PEWD, percentage of ears without damage.

Table 1 Soil chemical attributes at a 0 to 20 cm depth after limestone application in the 2014/2015 and 2015/2016 harvests⁽¹⁾.

Harvest	pH CaCl₂	OM	P_resin	H+Al	Al³⁺	K⁺	Ca²⁺	Mg	CEC	BS
Harvest	pH CaCl₂	(g dm^-3)	(mg dm^-3)	------------------------------------(cmol_c dm^-3)--------------------------------------						(%)
2014/2015	5.60	29.70	29.90	1.50	0.00	0.64	4.00	1.20	7.34	79.56
2015/2016	5.40	25.60	31.50	0.98	0.00	0.79	5.00	1.00	7.77	87.38

⁽¹⁾
pH, active acidity; OM, organic matter; P, available phosphorus; H+Al, potential acidity; Al, exchangeable acidity; K, available potassium; Ca, exchangeable calcium; Mg, exchangeable magnesium; CEC, effective cation exchange capacity; and BS%, base saturation at pH_7.0.

Como citar

copiar

Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira Caixa Postal 040315, 70770-901 Brasília DF Brazil, Tel. +55 61 3448-1813, Fax +55 61 3340-5483 - Brasília - DF - Brazil
E-mail: pab@embrapa.br

Acompanhe os números deste periódico no seu leitor de RSS

Versão para download de PDF

PDF

Inglês

Versões e tradução automática

Versão original do texto

English

Tradução automática

Google Translator
Microsoft Translator

Como citar

RIS

BIBTEX

Outros formatos de citação e exportação:

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
E-mail: scielo@scielo.org

Leia a Declaração de Acesso Aberto

Métricas

Inter-relação entre doses de potássio e a eficiência de genes Bt no controle de Spodoptera frugiperda

PlumX

Mensagem

[1] Corresponding author