1. <scp>MON</scp> 95379 Bt maize as a new tool to manage sugarcane borer ( Diatraea saccharalis ) in South America
- Author
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Renato J. Horikoshi, German Ferrari, Patrick M. Dourado, Juan I. Climaco, Hallison V. Vertuan, Adam Evans, Michael Pleau, Kimberly Morrell, Marcia O. M. A. José, Heather Anderson, Samuel Martinelli, Ramiro F. L. Ovejero, Geraldo U. Berger, and Graham Head
- Subjects
Bacillus thuringiensis Toxins ,Bacillus thuringiensis ,General Medicine ,Moths ,Plants, Genetically Modified ,Zea mays ,Saccharum ,Endotoxins ,Insecticide Resistance ,Hemolysin Proteins ,Bacterial Proteins ,Larva ,Insect Science ,Animals ,Edible Grain ,Agronomy and Crop Science ,Brazil - Abstract
The sugarcane borer (SCB), Diatraea saccharalis (Lepidoptera: Crambidae), is a key pest of maize in Argentina, and genetically modified maize, producing Bacillus thuringiensis (Bt) proteins, has revolutionized the management of this insect in South America. However, field-evolved resistance to some Bt technologies has been observed in SCB in Argentina. Here we assessed a new Bt technology, MON 95379, in the laboratory, greenhouse and field for efficacy against SCB.In a laboratory leaf disc bioassay, both MON 95379 (producing Cry1B.868 and Cry1Da_7) and Cry1B.868_single maize (producing only Cry1B.868) resulted in 100% mortality of SCB. The level of Cry1B.868 in the Cry1B.868_single maize is comparable to that in MON 95379 maize. However, the Cry1Da_7 protein does not have high efficacy against SCB, as evidenced by 20% mortality on Cry1Da_7_single leaf tissue. Total (100%) mortality of SCB in a Cry1B.868_single tissue dilution bioassay indicated that Cry1B.868_single maize meets the criteria to be classified as a high dose. Similar median lethal concentration (LCMON 95379 maize will bring value to maize growers in South America by effectively managing SCB even in locations where resistance to other Bt-containing maize technologies has been reported. © 2022 The Authors. Pest Management Science published by John WileySons Ltd on behalf of Society of Chemical Industry.
- Published
- 2022