INSECT, PLANT DISEASE, & WEED SCIENCE NEWS [No. 87-9] [May 15, 1987]

In This Issue: Postemergence Weed Control in Corn Algae and Moss Control in Water Tanks Summer Hours Combination Herbicides- What’s in A Name? Postemergence Weed Control in Corn Some of our early planted corn is ready for postemergence weed control. Suggestions for effective control include the following: When using atrazine with oil, annual grasses are best controlled when less than 1 1/2 tall. Bladex 80W or 90DF can also be used postemergence but omit the oil. Tandem in combination with atrazine or Bladex increases postemergence activity. Bladex should be used when corn is 4 or less. Apply Marksman when corn is under 5 . Buctril or Brominal alone or in combination with atrazine should be applied when most broadleaf weeds are under 6 . Laddok should also be used before broadleaf weeds reach 6 . Use drop nozzles when applying Banvel or 2,4-D to taller corn. Observe all label cautions on crop heights, rates, and safety to nearby crops, gardens, and windbreaks