Viruses causing grape fanleaf, tobacco rattle, and tobacco and tomato ring spots, as well as several strawberry viruses, are spread by nematodes feeding externally (i.e., ectoparasitic) on plant roots.
These infertile females lay infected eggs into new trees and thus spread the nematode.
The sedimented cells were washed three times in fresh BHI, and the final pellet was spread on nematode growth medium (NGM) agar plates of 8.5 cm diameter.
It is likely that immature compost could spread phytopathogens and nematodes, especially root knot nematodes that could result in up to 90% of tomato yield loss.
Monochamus alternatus, pine sawyer beetle, serves as a vector for this parasite, and it spreads the nematode to pine trees [2].
Cinkornpumin et al. suggest that the pheromone has likely evolved this ability in order to counteract the spread of the nematodes.
Its incidence has since increased in animals, and epidemiologic surveys showed spread of both nematode species to areas previously free of Dirofilaria nematodes, such as Germany and eastern Europe Romania, Croatia, Serbia, Bulgaria, Czech Republicc, and Rostov region in Russia) (7 ).
The droppings of the bird are collected by other ants and fed to their young, leading to further spread of the nematode.
Rivers have no apparent effect on nematode spread.
Consequently, we tested the potential effects of a temperature increase on the spread of this nematode in China.
