... since 1997, precisely in those regions dominated by Bt corn production2123. The hypothesized cause of ...
... all agricultural insecticides applied on a contact (b) and oral (c) toxicity basis from 1997 to 2012 ...
... goals were to (i) assess trends in bee toxic load on a contact and oral basis from 1997 to 2012 ...
... these trends among agricultural production regions. Results Trends in bee toxic load. Between 1997 and ...
... contact and oral toxic load, respectively. From 1997 to 2012, oral toxic load increased in 87% of counties ...