Spraying of maize plants with suspensions of 250 or 500 μg/ml of phenamiphos and 500 or 1000 μg/ml of oxamyl three days prior to larval inoculation of Heterodera zeae were found to be superior to post-inoculation sprays in reducing larval penetration into roots of cv. Ganga-5. In both the spray timings, phenamiphos proved to be more effective than oxamyl. After larval penetradon into the roots, their subsequent development was not affected to any significant extent.
Heterodera zeae, Zea mays, nematicidal spray
