■3- 



COBEX 



Cobex is a new soybean herbicide with a temporary permit for experimental use in 1972. 

 Only a limited amount will be made available. Cobex (formerly USB 3584) is an emulsifi- 

 able concentrate with two pounds per gallon of active ingredient, used for preplant 

 incorporation. The rate needed per acre may be slightly lower than that for Treflan. 

 Crop tolerance and the spectrum of control appear to be fairly similar for Cobex and 

 for Treflan. 



SENCOR 



Sencor is a preemergence soybean herbicide formulated as a 50-percent wettable powder 

 to use for surface application. It has a temporary permit from the federal Environ- 

 mental Protection Agency for experimental purposes in 1972. Sencor controls both 

 broadleaf and grass weeds. Careful rate adjustment is needed. Combinations will be 

 of interest experimentally. 



PROTECT, A SEED TREATMENT FOR CORN 



Protect is a seed treatment containing 1,8-naphthalic anhydride. Two ounces of the 

 powder is mixed with each half bushel of seed corn. The Protect seed treatment is 

 designed for use where com is planted in Eptam-treated fields. This might allow 

 an increased use of Eptam, especially for the control of wild cane and johnsongrass. 



OUTFOX 



Outfox is a triazine herbicide for postemergence use in corn. It and atrazine plus 

 oil would be used in a similar manner, but no additional oil is needed with Outfox. 

 The action may be relatively fast, and the residual potential is less than with 

 atrazine. Some corn injury may occur under certain conditions. 



OTHER CROPS AFTER BLADEX 



The Bladex label contains this statement: "Do not plant treated areas to any crop 

 except com, soybeans, small grains, sugar beets, alfalfa or potatoes until the 

 following planting year." The EPA interprets this to mean that ". . .these crops 

 may be planted after the normal harvest of com." That would not allow replanting 

 Bladex- treated corn fields with soybeans where the corn is injured by flooding or 

 from other causes . 



PLANT DISEASES 



LAWN PROBLEMS 



Stripe smut caused by Ustilago striiformis is appearing in many home lawns this 

 spring. It is especially bad on Merion bluegrass, but can also be found where 

 there is bentgrass , Kentucky bluegrass, and ryegrass. The only fungicide that 

 provides eradicative control is the systemic Tersan 1991 (Benlate or benomyl) . 



Apply the fungicide in the early spring, or in the fall before dormancy. Use 6 to 

 12 ounces of the 50 WP per 1,000 square feet. Drench-in with 50 gallons of water 

 per 1,000 square feet after application. Follow good fertility and irrigation prac- 

 tices to produce maximum growth of the turf. 



For further information, write for Report on Plant Diseases No. 400 (Revised 5/72) , 

 "Recommendations for the Control of Diseases of Turf grasses . " Send your request to 

 the Department of Plant Pathology, 218 Mumford Hall, Urbana 61801. 



