Conference publications

Abstracts

XV conference

Dynamics of Bt-plants under Bt-resistent moth invasion. Mathematical modeling.

Gonik M.M., Medvinsky A.B., Tyutyunov Y.V.¹, Li B.-L.², Rusakov A.V., Malchow H.³

Institute for Theoretical & Experimental Biophysics, Russia, 142290, Pushchino, Moscow Region, Institutskaya 3, tel.:(4967)739157, E-mail: medvinsky@iteb.ru, mgmaria@yandex.ru

¹Vorovich Research Institute of Mechanics and Applied Mathematics, Rostov State University, Russia, 344090, Rostov on Don

²University of California, USA, 92521, Riverside

³Institute of Environmental Systems Research, University of Osnabrueck, Germany, 49069, Osnabrueck

1 pp.

We investigate the model of the four-component agro-ecosystem including: genetically modified Bt-crops which produce insecticidal Bt-toxin; insect populations which possess Bt-susceptible features, Bt-resistant features and both of them simultaneously. It’s supposed that insect populations are moth whose larvae eat plants. The model is a modification of our previous agro-ecosystem model [1]. Bt-plants and Bt-susceptible insect biomass distributions are supposed to be homogeneous. A localized invasion of the insects with intermediate features possessing both Bt-susceptible and Bt-resistant features is considered. It’s shown that an integral characteristic of the Bt-plant biomass (Bt-plant biomass averaged in space at the end of the vegetation season) nonlinearly depends on the level of the Bt-plant germination. Namely, Bt-plant biomass averaged in space at the end of the vegetation season reaches its minimal values not only in case of a low Bt-plant germination level, but also at a high level of Bt-plant germination. Whereas a middle level of Bt-plant germination leads to a considerable increase of Bt-plant biomass averaged in space at the end of the vegetation season.

• view as PDF (in English) (PDF)