However, too many nematodes in the sample will lead to lengthy and tedious counting. When counting nematodes under the dissecting microscope, use a needle probe to prod nematodes to determine if they are still alive. Nematodes exhibiting no movement while prodded should be considered dead. Both live and dead nematodes must be counted. Counts of nematodes recorded by each group will be collected at the beginning of the lecture on Wednesday February 2 .
All nematodes are detrimental to agroecosystems.
Crop damage sustained from nematodes is reductive, not destructive. Name at least two sources of possible pollution of the environment that could be reflected in the nematicide bioassay.