-3- 



CLOVER AND ALFALFA 



Alfalfa weevil development has been extremely rapid this week. In the northern part 

 of the state, it is better to cut the first growth than to use an insecticide. Watch 

 new growth carefully, and apply an insecticide if this is necessary to save the crop. 

 Some new growth has already been damaged seriously. Now is also the time to think 

 about an application of methyl parathion in November to kill overwintering adults, 

 before they lay eggs for the 1971 alfalfa crop. This practice will prevent killing 

 weevil parasites. 



Lesser clover-leaf weevil larvae are now feeding on buds and tunnelling into the stems 

 Their feeding leaves dirty-looking channels. Stems often break over at the feeding 

 point, and the stem dies. No control is needed. This insect usually arouses more 

 curiosity than it does overall damage. 



HOMEOWNER PROBLEMS 



Armyworms are now feeding in lawns . The damage from these worms can be confused with 

 that of lawn webworms . Although many of the armyworms are parasitized, control may 

 be necessary. Use carbaryl (Sevin) at the rate of 2 ounces of 50 -percent wettable 

 powder per 1,000 square feet of lawn area. Apply with at least 3 gallons of water 

 per 1,000 square feet. 



Elm leaf beetle eggs are being laid, especially on Chinese elms. These eggs will 

 hatch into dirty-yellow to black worms that will skeletonize the leaves from the 

 underside. Spraying the tree with carbaryl (Sevin) when damage begins to appear 

 will provide control. 



Dusting or spraying new plants of vine crops, such as melons and cucumbers will pre- 

 vent injury from cucumber beetles , as well as from the bacterial wilt disease that 

 these insects spread from plant to plant while they feed. Use carbaryl, 5-percent 

 dust, or mix 2 tablespoons of the 50-percent wettable carbaryl powder per gallon of 

 water . 



WEEDS 

 WEED CONTROL 



Because of the poor corn stands caused by flooding or crusting, some farmers are re- 

 planting corn or changing to soybeans. Consider the existing stand and the date before 

 you decide to start over. There is a yield reduction from late planting, as well as 

 from poor stand. 



If you decide to replant, consider the pesticides used on the first planting before 

 choosing another crop and crop -protect ion program. Many of the pesticides cleared 

 for use on corn are not cleared for soybeans. Some of the pesticides used on corn 

 can significantly injure soybeans. Don't forget that double doses of chemicals with 

 close crop tolerances can cause corn injury. 



AAtrex, Primaze, Sutan-atrazine, Ramrod- atrazine, or any other combinations with 

 atrazine (AAtrex) will cause serious soybean injury if the soybeans are planted where 

 the chemicals have been used earlier in the spring. Lasso and Lorox are cleared for 

 use on corn and soybeans, but Ramrod and Londax only have a "seed bean" clearance 

 for soybeans. Knoxweed is a mixture of EPTC and 2,4-D; and both materials can injure 

 soybeans . 



