For Planavin, the manufacturer suggests that incorporation may be delayed as much as 

 two days. If rain should prevent mechanical incorporation, the rain itself will probably 

 do the job. Planavin is slightly more soluble and less volatile than Treflan, but in- 

 corporation is considered necessary for both. 



Vernam liquid and granular formulations are suggested as preplant incorporated treatments. 

 But the granules are also suggested as a preemergence treatment without incorporation. 

 Granules will probably reduce volatile loss until rainfall occurs. Slight incorporation 

 will probably decrease variability. According to current label suggestions, incorporat- 

 ing Vernam is necessary for control of nutgrass, wild cane, or Johnsongrass from seed. 



Dacthal has a low solubility, and will perform more consistently when lightly incorporated 



Amiben, Randox, Lorox, and Lasso are currently recommended for surface preemergence treat- 

 ment only. If adequate rainfall does not occur within 10 to 14 days, normal, rotary 

 hoeing is suggested. The practice will keep seedling weeds under control, and the slight 

 incorporation may improve herbicide performance. 



PASTURE WEED CONTROL 



Many broadleaved weeds in perennial grass pastures can be controlled easily with 2,4-D. 

 Timing is an important part of the spray problem in pastures. Most annual broadleaved 

 weeds germinate from late April through June. Most are susceptible to 2,4-D when they 

 are young and are growing fast. 



Biennial weeds, such as bull thistles, are more susceptible to 2,4-D when they are in 

 the rosette stage rather than in the flower-stalk forms. Perennial weeds like Canada 

 thistle are most susceptible when they are in the early-bud stage. 



Choose the application rate to fit the problem. In the young stages, most annual weeds 

 and dandelions can be controlled with 1/4 to 1/2 pound of 2,4-D per acre. Most other 

 pasture weeds can be controlled with a 1- to 2-pound application. Apply 1 to 2 quarts 

 per acre of a 4-gallon-per-acre formulation. The high rate will eliminate most legumes 

 in a grass -legume pasture. 



If woody or brush species must be controlled, use a mixture of 2,4-D plus 2,4,5-T 

 brushkiller. 



Do not spray seedling grasses or grasses that are in the boot to milk stage. Do not 

 graze dairy animals on treated areas for 7 days after treatment. 



SPECIAL ANNOUNCEMENTS 



Pesticide Dealers and Applicators' Field Day, 1:30 p.m., May 6, Office of the Grundy 

 County Extension Adviser, Kenneth Imig, Watseka. 



Insect and plant disease trouble -shooting will be the general topic, with special em- 

 phasis on the alfalfa weevil and corn borer. 



READ THE INSECTICIDE LABEL AND FOLLOW ALL PRECAUTIONS 



This weekly report was prepared as follows: 



insects: H.B. Petty, Steve Moore, Roscoe Randell, Don Kuhlman, and Stephen Sturgeon, 

 University of Illinois College of Agriculture, Urb ana- Champaign and Illinois Natural 

 History Survey. 



WEEDS: Marshal MoGlamery and Ellery Knake, Department of Agronomy . 



AG COMMUNICATIONS: Del Dahl. 



The information for this report was gathered by these people, staff members, county Exten- 

 sion advisers, and others, in cooperation with the USDA Agricultural Research Service, 

 Plant Pest Control Branch. 



