Survival and fecundity of Colorado potato beetle adults, Leptinotarsa decemlineata (Say), that had or had not fed previously on non-transgenic potato before exposure to transgenic potato containing the Bacillus thuringiensis subsp. tenebrionis Cry3A toxin (Bt) was investigated. In the laboratory, < 5% of first-generation adults survived after two weeks when restricted to Bt foliage since eclosi...

The hole forming device is an important element of the buckwheat hill-drop planter, and its design level directly affects seeding quality planter. A with a duckbill structure widely used in planters for wheat, cotton, peanuts, etc. According to requirements operations, this study designs components device. It determined that upper jaw length 65 mm, duckbills number 10, pressure plate on spring ...

Potato has become one of the primary cash crops in the arid region of the Loess Plateau. However, what and how cereal crops to rotate with potato is better for the farmer’s income and environment is unclear now. 11 potato based rotation systems were simulated in Yulin, using EPIC model based on local information. Results showed 1) Though mean potato yield decreased from 6.84 to 5.38 t/hm, the m...

The purpose of the study was investigate the scale and consequences of the engagement of children in agricultural work activities in Poland. The study covered 1,006 children aged 12-14, who completed an audience questionnaire form: 'Engagement of children in household and farm activities'. As many as 258 children kept diaries, in which they registered all work and everyday activities performed ...