in order to investigate the biodiversity of plant parasitic nematodes of vegetable fields in mashhad area, 51 soil and root samples were collected during 2010-2011. nematodes were extracted by centrifugal flotation technique and transferred to glycerin according to the modified de grisse method (1969). the permanent slides were prepared from the extracted nematodes. the nematodes were identifie...

Four extraction methods for Bursaphelenchus xylophilus and other aphelenchid nematodes were compared on the number of nematodes per gram recovered, and on the precision of the mean number of nematodes per gram of pine wood. The number of nematodes per gram recovered by each method, in addition to its inherent shortcomings when the actual number of nematodes is unknown, failed to provide clear r...

The behavior of Heterorhabditis zealandica Poinar strain T327 was investigated in the presence of the cabbage maggot, Delia radicum L., and plants that are susceptible to D. radicum infestation. Newly formed puparia and freeze-killed third instar larvae were attractive to infective nematodes. Newly harvested infective nematodes did not respond to the puparia, whereas 1-month-old and 2-month-old...

Initially it was believed that when ELT-2 was knocked out in nematodes this caused the nematodes to become sick from all pathogens, even ones that were not previously pathogenic. However, an experiment conducted later suggested that in older cultures of bacteria the ELT-2 knocked out nematodes do not become sick from pathogens that were previously nonpathogenic. In order to clarify the role of ...

in order to identify the plant parasitic nematodes of tomato fields in northern khorasan province, 50 soil and root samples were collected during 2009 - 2010. nematodes were extracted by combined sieving and centrifugal-flotation method and processed to be transferred to glycerin. after preparing microscope slides, the morphological and morphometrical characters of the nematodes were studied us...

conclusions through these results, the applicability of the used extracts in the control of eggs and/or larvae of t. canis and a. caninum is suggested. however, it is worth mentioning that further studies should be performed with the species e. edulis, m. glomerata and m. laevigata, using different extracts, new concentrations, and in vivo studies, in order to ensure further clarification on th...