longer from harvest, you may want to make another insecticide application. Al- 

 though, if the crop is within a week or so of harvest, you may prefer to cut the 

 hay a few days early to avoid the extra cost of insecticide. In this case, be 

 prepared to spray the stubble as soon as you remove the hay, since those larvae 

 present will move immediately from the hay to the new shoots in large numbers and 

 damage could be severe. Later developing fields will probably require the normal 

 insecticide program. 



In the area south of a line from Harrisburg to Carbondale, spraying began 10 days 

 ago, and fields should be examined to see if a second application is needed during 

 the next 10 days. Advanced fields may be harvested a little early to avoid the 

 second application, but be ready to spray the stubble. 



Spraying began this week in the area north of this Harrisburg-Carbondale line, 

 up to a line from Carmi to Pinckneyville to Sparta. Weevil feeding in that area 

 became quite apparent this week, and untreated fields will be severely damaged 

 within another 7 days . 



Hatching began late this week in the area north of the Carmi-Sparta line and south 

 of Route 50. Hatch will progress rapidly now. Examine fields to find out when 

 25 percent of the terminals show feeding. Many fields will meet this criterion 

 by Monday, April 22. 



Fields in the area north of Route 50 and south of Route 40 should begin to show 

 feeding this week. Some may require an insecticide application. 



Larvae will be appearing in fields in the area north of Route 40 and south of a 

 line from Watseka to Springfield to Hardin late in the week of April 22 or early 

 in the week of April 29. 



The insecticide recommendations are: 



1. Experienced commercial applicators who have the proper protective clothing 

 will get the best results with methyl parathion applied at 1/2 pound per acre 

 or a special alfalfa weevil spray of azinphosmethyl (Guthion) at 1/2 pound 

 per acre. Azinphosmethyl can be applied only once per cutting . Do not har- 

 vest for 15 days after treatment with methyl parathion and for 16 days with 

 azinphosmethyl . 



2. The person not properly equipped with protective clothing to use methyl 

 parathion or azinphosmethyl can use a mixture of 3/4 pound of malathion and 

 5/4 pound of methoxychlor per acre (3 pints of a concentrate containing 2 

 pounds of methoxychlor and 2 pounds of malathion per gallon) or a mixture con- 

 taining at least 1/2 pound of diazinon and 1 pound of methoxychlor per acre 

 (2-1/2 to 3 quarts of the commercially prepared mixture Alfatox) . You may 

 also use 1-1/4 pounds of malathion per acre (1 quart of the 5-pounds-per- 

 gallon concentrate) in the morning, on days when air temperatures will be 

 above 60° F. Do not harvest for 7 days after treatment with methoxychlor, 

 diazinon, or mixtures of them. There is no waiting period for malathion. 



The quantity of finished spray applied per acre is also important. Use no less 

 than 4 gallons per acre by air or 20 gallons per acre by ground machine. The 

 exception is on stubble, where 10 gallons per acre by ground will be sufficient. 



