Our results showed that the application of tobacco residue alone
inhibited the growth of tomato plants, decreased the tomato yield,
aggravated the infection of nematodes, and reduced the population
of nematodes in the soil under field conditions by 29.38%. This
indicated that tobacco residues might contain specific compounds
that affected growth of tomato plants, nematode infection to host
plants and densities of the nematodes in the soil. Therefore, tobacco
residue used alone is not appropriate for nematode control based
on our repeated field experiment in 2008 and 2009.