Abstract:
Six methods of application of DBCP were evaluated with reference to the
diffusion and penetration of the material into soil and the knock-down of plant
parasitic nematode population in field and polythene column experiments. Under
field conditions application of DBCP along with irrigation water gave maximum crop
response and best kill in the 0-30 cm layer, but in deeper layers, injection followed
by irrigation has given higher percentage kill. The Onion test in the polythene
column experiment indicated that DBCP was able to penetrate 30-45 cm deep, when
applied along with irrigation water. Injections at 15 and 23 cm depths resulted in
the restricted movement of DBCP within 0-30 and 15-45 cm depths, respectively.
When injections were given at 23 cm depth followed by irrigation, an upward as well
3s downward movement of the nematicide seems to have occurred. The depth of
application by spot injegtion with without irrigation seems to be a critical factor
jn obtaining highest percentage kill of the plant parasitic nematode population.
