naled and parathion in protecting. the plants from all degrees of injury. 
Niagara NIA-10242 was as effective in all respects as endosulfan and was 
superior to naled and parathion in preventing looper feeding. The looper 
control provided by Bayer 50282 and General Chemical 3707 was equal to that 
provided by naled and parathion. All materials tested were highly effective 
against very light populations of the imported cabbageworm and diamondback 
moth. Bayer 25141, American Cyanamid CL-47470, and methyl parathion caused 
severe injury to the plant foliage. 
In 1965, each material tested controlled a light infestation of the 
diamondback moth. All materials except American Cyanamid E.I. 47031 gave good 
control of the imported cabbageworm. Treatment with Azodrin resulted in the 
highest production of class 1 plants and gave adequate control of the cabbage 
looper, which averaged 1.9 larvae per untreated plant. American Cyanamid 
CL-47470 at 1 pound/acre was inferior to Azodrin only in the production of 
class 1 plants. However, this material caused severe injury to the plant 
foliage. Metacil at 1 pound/acre was superior to endosulfan only in reducing 
amounts of class 3 plants. Looper control obtained with American Cyanamid 
E.I. 65-1 was as good as that obtained with endosulfan. American Cyanamid E.I. 
47031 and Bayer 52957 were inferior to endosulfan in reducing caterpillar 
injury. 
Fall Treatments 
Results of the fall treatments are summarized in table 2. [In 1963, all 
of the compounds tested gave good control of a light fall armyworm infestation. 
Sprays.of endrin at 0.4 pound/acre and Monsanto CP-40294 at 1.0 pound/acre 
resulted in the highest production of class 1 plants and each gave good pro- 
tection against cabbage looper damage. Monsanto CP-.0273 and Metacil performed 
equally as well as endrin but resulted in the production of fewer class 1 
plants. Neither naled, Shell Development 8280, Shell Development 8803, Shell 
Development 8988, nor Stauffer N-2404 provided adequate control of the cabbage 
looper. Severe injury to the plant foliage was observed a few days after the 
first application of the Monsanto CP-40273 spray. 
In 1964, General Chemical 9287, American Cyanamid CL-47470, and Azodrin 
gave good control of a relatively light population of the cabbage looper. 
These materials were the only ones tested that gave adequate protection to the 
plants. Sperlox ethyl parathion was as effective as parathion. Shell Devel- 
opment 9098 and Geigy GS-13005 were inferior to parathion in reducing the 
number of plants in class 3. The plant protection obtained with bromophos and 
Chemagro 4641 was inferior to that obtained with parathion. All of the 
compounds tested effectively controlled a light infestation of the fall army- 
worm. Chemagro 4641 caused severe injury to the plant foliage. 
In 1965, each of the compounds tested controlled a light infestation of 
the fall armyworm. Against a relatively light infestation of the cabbage 
looper, Azodrin (at 1 pound/acre), American Cyanamid E.I. 65-1, Niagara 
NIA-1022 , and General Chemical 6506 provided good plant protection; these 
materials were superior to both naled and endosulfan in the production of 
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