-5- 



ALFALFA WEEVIL 



Suggested insecticides are methyl parathion, azinphosmethyl, malathion, malathion 

 plus methoxychlor, or diazinon plus methoxychlor. (See page 7, 1968 revised Cir- 

 cular 899 for details.) 



Use of flamers or burners during the dormant winter period to burn alfalfa stems 

 and debris has met with varying success. Special burners are available for this 

 purpose. Their success in alfalfa weevil control will depend on the extent of fall 

 and winter egg laying by the adults, as they deposit eggs in alfalfa stems. Khen 

 these are burned during the winter months (or in the early spring before plant 

 growth begins), the attack by weevil is delayed. Thus, burning replaces the first 

 insecticide application. Because the value of this method depends on fall and win- 

 ter egg laying, it may be limited in use to the southern third of Illinois. Few 

 eggs will be laid before spring in the northern half of Illinois. 



IIBP:ph 

 11/29/67 



