Journal or Publishing Institution: Növényvédelem
Study: https://www.cabdirect.org/cabdirect/abstract/20093316178
Author(s): Takács, E., Lauber, É., Bánáti, H., Székács, A. and Darvas, B.
Article Type: Journal Publication
Record ID: 1917
Abstract: At present there are 110 single or stacked event genetically modified (GM) plant varieties under EU registration. Bt plants emerged in Hungary considerably in maize, and their range was limited to varieties resistant to corn borer and corn rootworm. It has been mentioned as an advantage of Bt plants that they provide continuous protection against the target pest and related species with similar modes of action. The active substance is not subject to certain environmental effects (UV radiation and rain) that could possibly lower its efficacy. It has been considered as a disadvantage, however, that the pollen of Bt corn containing the cry gene originated from Bacillus thuringiensis may fertilize the flowers of traditional varieties. Long term co-existence of a conventional a GM variety with same flowering time in case of cross-pollination is an ecological nonsense. Btplants produce large specific amounts of Cry toxin protein (toxin/hectare), and this toxin encapsulated in the plant cells remain long in the environment. The effects of the toxin on the arthropods involved in the decomposition of the stubble and on soil microbial populations are not yet sufficiently revealed. Pollen of Cry toxin content drifting off the fields modifies the habitat quality of the area and its borders, therefore, may cause risks to protected butterflies. Rapid insect resistance development is observed with plant varieties producing a single Cry toxin. There remain wide-ranging and unresolved debates regarding the food safety aspects of Cry-toxins.
Keywords: Bacillus thuringiensis, Plants, Zea mays; Biological Control, Genetically Engineered Organisms, Maize, Natural Enemies, Pest Resistance, Plant Protection, Toxins, Transgenic Plants; Bacterium, Biocontrol, Corn, Crop Protection, Genetically Engineered Plants, Genetically Modified Organisms, Genetically Modified Plants, GEOs, GMOs, Transgenic Organisms
Citation: Takács, E., Lauber, É., Bánáti, H., Székács, A. and Darvas, B., 2009. Bt plants in plant protection. Növényvédelem, 45(10), pp.549-558.
