Avaliação de tecnologias de refúgio no cultivo de milho transgênico
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Data
2012-07-01
Autores
Zancanaro, Paolo Orlando [UNESP]
Buchweitz, Elizandra Döring [UNESP]
Boiça Junior, Arlindo Leal [UNESP]
Moro, José Roberto [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Resumo
O objetivo deste trabalho foi comparar o uso de refúgio tradicional em áreas separadas com a tecnologia alternativa de refúgio pela mistura de sementes não transgênicas no saco (refuge in the bag - RIB) em diferentes proporções. Foram utilizados os híbridos comerciais transgênicos AG 7000YG e DKB 390YG com refúgios plantados com as respectivas cultivares convencionais. Avaliaram-se sete tratamentos: RIB com quatro proporções de mistura de sementes não transgênicas (2,5, 5,0, 7,5 e 10%) no saco; refúgio tradicional, com 10% da área plantada exclusivamente com cultivar não transgênica; e área totalmente cultivada com plantas transgênicas ou totalmente com plantas não transgênicas. O híbrido DKB 390YG foi o mais produtivo. Para este híbrido, não foram observadas diferenças de produtividade entre os tratamentos, com exceção do controle inteiramente convencional, que produziu menos. Com o híbrido AG 7000YG, a tecnologia RIB com proporções de 5,0 e 7,5% de sementes não transgênicas apresentou as maiores produtividades, significativamente superiores às do refúgio tradicional, que não diferiu do controle convencional. Nos tratamentos RIB, as diferenças nas intensidades de dano por Spodoptera frugiperda não se refletiram em diferenças na produtividade. O refúgio no saco é alternativa viável para substituir o método de refúgio utilizado atualmente.
The objective of this work was to compare the traditional refuges in separated areas with the alternative technology of refuge provided by the mixture of conventional seeds in the bag (refuge in the bag, RIB) with different proportions. The commercial transgenic hybrids AG 7000YG and DKB 390YG were used with the refuges sown with their respective conventional cultivars. Seven treatments were evaluated: RIB with four mixing rates of nontransgenic seeds (2.5, 5.0, 7.5, and 10%); traditional refuge, with 10% of the area sown exclusively with nontransgenic cultivar; and entirely cultivated areas with transgenic or nontransgenic plants. The DKB 390YG hybrid was the most productive. For this hybrid, there were no yield differences between treatments, except for the control (entirely conventional), which had lower yield. With the AG 7000YG, RIB technology with 5.0 and 7.5% of nontransgenic seeds provided the best yields, significantly higher than the one from traditional refuge, which did not differ from the conventional control. In the RIB treatments, differences in damage intensities by Spodoptera frugiperda did not reflect in yield differences. Refuge in the bag is a viable alternative to the currently used refuge method.
The objective of this work was to compare the traditional refuges in separated areas with the alternative technology of refuge provided by the mixture of conventional seeds in the bag (refuge in the bag, RIB) with different proportions. The commercial transgenic hybrids AG 7000YG and DKB 390YG were used with the refuges sown with their respective conventional cultivars. Seven treatments were evaluated: RIB with four mixing rates of nontransgenic seeds (2.5, 5.0, 7.5, and 10%); traditional refuge, with 10% of the area sown exclusively with nontransgenic cultivar; and entirely cultivated areas with transgenic or nontransgenic plants. The DKB 390YG hybrid was the most productive. For this hybrid, there were no yield differences between treatments, except for the control (entirely conventional), which had lower yield. With the AG 7000YG, RIB technology with 5.0 and 7.5% of nontransgenic seeds provided the best yields, significantly higher than the one from traditional refuge, which did not differ from the conventional control. In the RIB treatments, differences in damage intensities by Spodoptera frugiperda did not reflect in yield differences. Refuge in the bag is a viable alternative to the currently used refuge method.
Descrição
Palavras-chave
Spodoptera frugiperda, Zea mays, Seeds mixture, refuge in the bag, Insect resistance, yieldgard, Spodoptera frugiperda, Zea mays, mistura de sementes, refúgio no saco, Resistência de insetos, yieldgard
Como citar
Pesquisa Agropecuária Brasileira. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Informação TecnológicaPesquisa Agropecuária Brasileira, v. 47, n. 7, p. 886-891, 2012.