These seeds allow the farmer to grow a crop that can be sprayed with herbicides to control weeds without harming the resistant crop.

Agricultural biotech companies are also developing genetically engineered crops resistant to other herbicides.

Mendel (Brassica napus L.), as a clubroot resistant crop.

Finally, a good rotation system that follows susceptible crops with resistant or non-host crops can assist in diminishing the pathogen.

Methods included breeding curly top virus resistant crops, planting earlier or later in the year, the use of insecticides, and weed management.

In terms of food yielding level, less water needed and drought resistant crops can be developed.

Biotechnology has been advocated to create high yield, pest and environmentally resistant crops in the hands of small farmers.

There are also fungal and virus resistant crops developed or in development.

The survey, however, indicated that farmers are shying away a bit from crops resistant to Monsanto's Roundup herbicide, other than soybeans.

In resistant crops, these numbers are, respectively, 9.5% and 1.8%.