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Experiment VII Post-emergence Insecticide Applications for Corn
Wireworm and Cucumber Beetle Grub Control. Florigold 107 sweet corn
was planted on January 30, 1964. .Insecticides .were applied to the
soil in the row on February 19 and .covered to a depth of about 1 or
2 inches using a hand plow.

 Live Insects/100 Plants
 Lbs. Corn Cucumber Percent
 per Wire- Beetle Damaged
Insecticide Formulation Acre worm Grubs Total Plants

1% Thimet on Soy Feed 100 1.2 6.7 7.9 0.6
1% Thimet on Cracked Corn 100 2.4 5.5 7.9 5.0
1% Thimet on Cornmeal 100 0.6 8.5 9.1 0.7
10% Thimet Granules 10 3.0 3.6 6.6 4.2
10% Thimet Granules 50 2.4 2.4 4.8 2.1
10% Parathion Granules 50 1.2 7.9 9.1 0.6
Untreated -- 4.8 12.7 17.5 .5.0


 SUMMARIZATION OF WIREWORM EXPERIMENTS. The southern potato wireworm
is adequately controlled by phosphatic insecticides such as Diazinon and
parathion. However, the corn wireworm is considerably more difficult to
control.

 No Wireworm treatment has consistently been as effective as we would
desire. In general, baits and insecticide combinations have shown promise
and will be closely studied in future research.

 As mentioned earlier, the data included in this report should not be.
construed as recommendations.

 Before using any insecticide on a crop or on land to be planted to a
crop, the grower should be certain that the insecticide is approved for use
on that crop and in the manner that he plans to use it.