Evaluation of different doses of Achook (1500 ppm azadirachtin EC) against
Meloidogyne incognita (RKN‐Mi) infecting okra (Abelmoschus esculentus
Moench.) was undertaken under net house and open‐field conditions. Re‐
sults of pot (10cm dia) experiment showed that soil drenching of Achook and
Achook A1 (contains sesame oil) at higher dosage (≥10litre/ha) showed re‐
duced root galling, greater suppression of final soil nematode (J2) population
and increased shoot height of okra. The single drenching of Achook and
Achook A1 at 5 litre/ha at 15 days after sowing (DAS) immediately after ap‐
pearance of first gall was also quite effective for managing the RKN‐Mi on
okra. Results from open‐field testing of Achook EC showed efficacy to control
RKN‐Mi. The Achook and Achook A1 formulations at 5 litre/ha as single appli‐
cation after with the appearance of first gall was found to be most effective
for reduction of root galling, soil nematode population (63 to 67%), increas‐
ing shoot height and improving (20 to 23%) fruit yield of okra. Further, at all
dosages both formulations showed nematode control efficacy and enhance‐
ment of crop yield. The Achook A1 was found to be more effective (38%
more yield) than soil application of carbofuran 2kg a.i./ha and neem cake at
1000kg/ha. Considering incremental cost benefit ratio (ICBR), the Achook
(ICBR~4.23) and Achook1 (ICBR~4.03) at 5 litre/ha as a single soil drench with
the appearance of root galling in okra was found to be the most economical.
This was followed by Achook1 at 2.5 litre /ha as soil drench twice (7 DAS and
30 days after first drench) and Achook A1 5litre and 10litre/ha. The Achook
A1 was found to be relatively more effective than that of carbofuran at 2kg
a.i./ha and neem cake at 1000kg/ha.