A few clover leaf weevils can be found in every alfalfa and clover field but as 

 yet no damaging populations have been reported. 



Cutworms can also be found feeding on red clover in south-central and southern 

 Illinois. The clover, however, seems to be growing away from the damage. 



White grubs have been discussed in the past 2 weeks as a potential soybean and 

 corn root pest in the eastern and central areas of Illinois. They have a 3-year 

 life cycle. The last outbreak was in 1965, when many fields of soybeans were 

 severely damaged. If you find lots of grubs as you are plowing, you may want to 

 apply a soil insecticide. If the field is to be planted in corn, apply 1-1/2 

 pounds of actual aldrin or heptachlor and disk it in ahead of planting. Do not 

 use either aldrin or heptachlor on fields to be planted in soybeans. Ahead of 

 soybeans, 4 pounds of actual diazinon- -broadcast and disked- in- -should provide 

 get-by protection. 



We will appreciate reports of this pest this year. Please notify your county 

 Extension adviser. 



Plant Diseases 



Septoria leaf spot is now spreading upwards on the leaves of wheat, and will con- 

 tinue to spread as long as the cool weather persists. 



Powdery mildew was observed on wheat south of Highway 40 this past week. This 

 disease will become more prevalent as the weather warms up. It is readily rec- 

 ognized by the powdery white growth that occurs in patches on leaves and sheaths. 



Weeds 



Ramrod has additional clearance in 1968 for corn- -including seed production fields, 

 sweet corn, and corn for grain forage or silage. Livestock can now be turned into 

 Ramrod -treated cornfields after harvest. You may also use Ramrod on sorghum, 

 unless the sorghum is to be grazed by dairy cattle or used as silage for dairy 

 cattle. 



Ramrod is not cleared for weed control on soybean fields, if the beans are to be 

 used for food, feed, or oil. It can be used if the soybeans are to be used for 

 seed only. 



Sutan is now cleared for field corn, sweet corn, and corn used for silage. It is 

 not cleared for hybrid corn grown for seed. (Several seed corn companies will 

 have trials to further check corn tolerance this year.) It may be used alone at 

 4 pounds actual (2/3 gal.) per acre on a broadcast basis. Incorporate into the 

 soil immediately after application. 



One of the major ideas of interest is to apply a combination of Sutan and Atrazine. 

 Although results with this combination looked promising in 1967, only field-trial 

 use is suggested in 1968, in order to obtain more information on weed control and 

 crop tolerance under a wider range of conditions. In trying this combination, we 

 suggest 3 pounds (1/2 gal.) of Sutan with the Atrazine; 1-1/4 pounds of Atrazine 

 SOW on lighter-colored soils may be sufficient, but nearly 2 pounds may be needed 

 on the darker soils. Supplies should be sufficient for this purpose in 1968. We 

 will also further evaluate the combination this year in research trials. 



