Chinese Journal of Entomology (1996) 16, 95-106
Wen-Feng Hsiao and John N. All (1996)
Effects of temperature and placement site on the dispersal of the entomopathogenic nematode, Steinernema carpocapsae in four soils
Chinese Journal of Entomology 16 (2), 95-106
Abstract: The effects of temperature and placement site on the movement of the entomopathogenic nematode, Steinernema carpocapsae was conducted in the laboratory. The temperatures tested were -20, 25, and 35°C at application depths of surface, 5, and 10cm. The soils tested were pure sand, Cecil coarse sandy loam, silty loam and sandy clay loam. At -20°C, lower numbers of nematodes were recovered but the survivors were able to infect Galleria larvae. These nematodes dispersed very little regardless of the placement site. At 25°C, the total number of nematodes recovered at 3 application depths were the highest among the 3 temperatures in the four, soil types. Nematodes moved more readily in sand and silty loam than in coarse sandy loam or sandy clay loam. At 35°C, fewer of infective juveniles were recovered from the four soils when compared with those of extracted nematodes at 25°C. When infective juveniles of S. carpocapsae were placed on the soil surface, they displayed little downward movement at -20, 25 and 35°C in the four types of soil. At 35°C, no nematodes were recovered from 6cm (or deeper) below the placement site, however, they only tended to move to the next 5cm layer. Higher numbers of nematodes were recovered from sand when placed at a 5cm depth, and higher numbers were recovered from silty loam when placed at a 10cm depth. The present data show that the migration of infective juveniles tends to decrease as the proportion of silt and clay increase in soil.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Steinernema carpocapsae/Xenorhabdus nematophila (entomopathogen) |
