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The control of frit fly, Oscinella frit (L.), in sweet corn (Zea mays) by Thimet (O, O-diethyl S-ethylthiomethyl phosphorodithioate).

Published online by Cambridge University Press:  10 July 2009

W. F. Jepson  and
P. Mathias
W. F. Jepson
Affiliation:
Imperial College, London, S.W.7.
P. Mathias
Affiliation:
Imperial College, London, S.W.7.
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Extract

Sweet corn (Zea mays) is frequently attacked by Oscinella frit (L.) in southern England because the optimal sowing date (1st–20th May) determines the appearance of the seedlings at the peak of the spring flight (13th–30th May).

A Latin-square experiment including three Thimet treatments and controls showed that almost complete protection could be given by seed-furrow and surface placements along the rows of an 8 per cent, granular formulation at the rate of 2 lb. actual Thimet per acre.

The crop on the untreated control plots was more than halved by the naturally occurring infestation of 45 per cent, of the primary shoots.

Estimation of Thimet residues in cobs taken from the seed-furrow treatment showed that only a very minute trace of toxic material was present.

Tasting tests on cobs from treated plots revealed no detectable taint.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 51 , Issue 3 , November 1960 , pp. 427 - 433
Copyright
Copyright © Cambridge University Press 1960

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