-4- 



Planting corn early does not allow a preplant tillage attack to be effective on nut- 

 sedge. However, a combination of the right herbicides plus cultivation can often 

 keep yellow nutsedge under control in corn. Sutan (butylate) , Eptam (EPTC) , Lasso 

 (alachlor) , or AAtrex (atrazine) can be applied as a preplant -incorporated treatment. 



AAtrex is often combined with Lasso or Sutan to provide better control of nutsedge and 

 broadleaf weeds. Eptam often injures corn. Using Eradicane (Eptam-plus-safener) or 

 a seed- treatment called Protect, will lessen the risk of corn injury. A postemergence 

 atrazine-plus-oil treatment will also control yellow nutsedge. 



Johnsongrass . Plan your attack on Johns ong ras s . Seedlings are usually the worst prob- 

 lems, but rhizome survival may be high this year because of the mild winter. 



In corn, seedlings can be controlled with Sutan (butylate) or Eptam (EPTC) . Eptam often 

 injures corn. Using Eradicane (Eptam plus a safener) or Protect (a seed treatment) 

 will lessen corn injury. 



In soybeans, Johnsongrass seedlings can be controlled with Treflan (trifluralin) ,Ver- 

 nam (vernolate) , Cobex (dinitramine) , or Planavin (nitralin) . Use the higher label 

 rates and thoroughly incorporate these herbicides. 



A new program of double-rate Treflan for two years will control Johnsongrass seedlings 

 and will also provide effective rhizome control. Another program for rhizome control 

 is a combination of an aggressive preplant tillage program combined with an effective 

 seedling program, as outlined previously. 



If you have planted wheat and will not be double -cropping to soybeans 

 use Dowpon after small grain harvest to control rhizome Johnsongrass. 



PLANT DISEASES 



then you can 



SOYBEAN DISEASES 



The cysts of soybean cyst nematodes may be spread from infested to noninfested areas 

 by birds, according to research by University of Tennessee's James M. Epps. In Epps' 

 studies, cysts were recovered from the excrement of blackbirds. The cysts contained 

 live nematode larvae able to infect the roots of susceptible soybeans. 



CORN DISEASES 



Mycotoxins . The 1972 U.S. corn crop is being closely watched, both in this country 

 and the Soviet Union, for signs of contamination by two naturally occurring fungus 

 toxins - - zearalenone (F-2) and a trichothecene compound called T-2. The following 

 comparisons may clarify the situation: 



Zearalenone , F-2 



T-2 Toxin 



Source : 



Effect of 

 mycotoxin on 

 susceptible 

 animals : 



Major concern: 



Gibberella zeae-- common 

 ear mold of field origin. 

 (Some F-2 is also produced 

 by F. tricinctym. ) 



Estrogenic effects on pre£ 

 nant females and breeding 

 stock (primarily swine) -- 

 abortion, prolapse of the 

 uterus, and so on. 



Human consumption of con- 

 taminated grain, presence 

 in animal feed. 



Fusar-ium tri cine 'turn- -a less 

 common ear mold of field origin. 



Leukemia -type symptoms -- 

 predisposition to hemorrhage 

 and exhaustion of bone marrow; 

 alimentary toxic aleukia (ATA) 

 disease in humans . 



Human consumption of contaminated 

 grain, presence in animal feed. 



