-3- 



We do not have data on the performance of carbofuran under conditions of severe infes- 

 tations , and therefore cannot recommend it for protection against these two seed- 

 attacking insects. 



Other Insects: If symphylans are present, Dyfonate has label approval. However, the 

 organophosphates and carbamates, as used for rootworm control, may be depressing the 

 symphylan populations enough for practical purposes. 



FIELD-DEMONSTRATION RESULTS 



Wireworms were not controlled satisfactorily in sixteen fields where all materials were 

 applied as strip treatments. Even aldrin and heptachlor did not control the large, 

 nearly mature wireworms . 



Most materials used provided some control of white grubs. The number of seed-com bee- 

 tles and maggots in these fields was too small to provide a basis for conclusions. Di- 

 rect these materials at the base of the plant in early to mid- June. 



Cutworms : For 1971, we are recommending the use of control measures when the first cut- 

 worms begin to appear. This will require careful observation. 



We recommend the use of (1) carbaryl as a bait on an apple-pomance carrier; (2) with 

 blackstrap molasses; (3) premixed with molasses (Sevimol) ; or (4) with Tractum, a com- 

 mercially available attractant. The last three will be sprayed on the base of the plant 

 .and soil at the rate of 2 pounds of carbaryl per acre. The bait will be applied so 

 that 1 to 1.5 pounds of carbaryl are used per acre. 



lAvoid the use of molasses baits adjacent to bee hives or near an area that is often fre- 

 quented by honey bees . 



POSSIBLE PROBLEMS 



ICertain unwanted effects may occur. Some of these can be prevented with care. The 

 following suggestions may help avoid problems: 



1. Surface erosion or run-off. Do not apply any of these insecticides to fields with 

 severe slopes that drain directly into ponds or streams. 



2. Seed germination. Some of these insecticides will not affect the germination of 

 seeds. Nevertheless, for the time being, we suggest that all of these insecti- 

 cides be applied as a 7-inch band on the surface of the soil ahead of the press 

 wheel at planting. They should not be directed in a stream into the shoe of the 

 planter, as done in the past with aldrin and heptachlor. 



3. Calibration. Calibrate the granular applicator carefully. Check the number of 

 acres planted against the pounds of granules used. Do this quite often until the 

 exact amount of insecticide is being applied. Excessively high rates are not only 

 costly but may be damaging to the crop. 



bux and carbofuran. We are still unsure about the effects of BUX and carbofuran 

 on the earthworm populations , but we are not as worried about this as we were 

 last vear. 



