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Full-Text Articles in Agriculture

Genetic Variability Of The European Corn Borer, Ostrinia Nubilalis, Suggests Gene Flow Between Populations In The Midwestern United States, Jeffrey T. Krumm, Thomas E. Hunt, Steven R. Skoda, Gary L. Hein, Donald J. Lee, Pete L. Clark, John E. Foster Jan 2008

Genetic Variability Of The European Corn Borer, Ostrinia Nubilalis, Suggests Gene Flow Between Populations In The Midwestern United States, Jeffrey T. Krumm, Thomas E. Hunt, Steven R. Skoda, Gary L. Hein, Donald J. Lee, Pete L. Clark, John E. Foster

Department of Entomology: Faculty Publications

The European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), is a widely distributed and serious economic pest to corn production in the U.S. Genetic variability of O. nubilalis was studied in 18 sub-populations in the upper Midwestern United States using amplified fragment length polymorphism. The relatively low GST values indicate that more variation exists within populations than between populations. High gene flow (Nm) values were indicated across the entire O. nubilalis population; the lowest degree of gene flow was in the northern samples (Nm = 1.96) and the highest degree of gene flow was in the southern samples (Nm = …


Agroecossistemas Orizícolas Irrigados: Insetos-Praga, Imimigos Naturais E Manejo Integrado, Leila Lucia Fritz, Elvis Arden Heinrichs, Marciele Pandolfo, Silvia Martins De Salles, Jaime Vargas De Oliveira, Lidia Mariana Fiuza Jan 2008

Agroecossistemas Orizícolas Irrigados: Insetos-Praga, Imimigos Naturais E Manejo Integrado, Leila Lucia Fritz, Elvis Arden Heinrichs, Marciele Pandolfo, Silvia Martins De Salles, Jaime Vargas De Oliveira, Lidia Mariana Fiuza

Department of Entomology: Faculty Publications

Nos ecossistemas de produção de arroz irrigado, os insetos-praga são considerados uma das limitações na produção mundial. Diante desse fato, diversas formas de controle vêm sendo pesquisadas para minimizar o problema. O uso contínuo de produtos fitossanitários ocasiona a resistência das pragas, além do aumento da população de pragas secundárais. Como alternativa, o uso do controle biológico, através de inimigos naturais, como predadores, parasitóides e patógenos, se revela capaz de regular as pragas em seu ambiente natural, reduzindo a densidade das populações e conseqüentemente os danos às plantas hospedeiras. Sendo assim, nesse trabalho de revisão são apresentados dados sobre a …