In addition, developments in biotechnology have produced genetically modified crops that are either able to survive spraying with herbicides or contain their own bioengineered pesticides.
Glycosphingolipids were visualized by spraying the plates with orcinol\sulphuric acid.
Often the intention is to study the interactions between the factors; in this instance, the best time for spraying might depend upon the fungicide used.
Apart from spraying, there were no changes in the general management practices on any of the three farms during the entire study period.
The farm is subjected to frequent-pesticide sprayings to control insects and other pests.
Plots were hand weeded as necessary and cowpea -ower and pod pests controlled by prophylactic spraying from the budding stage onwards.
Fewer farms employed plunge-dipping (0.16) or communal spraying (0.1) methods for ectoparasite control on sheep.
The parameter estimate suggests that daily mortality in the escarpment increased by 8% after the onset of spraying.
