this through the boom. This will help to neutralize any herbicide residue still 

 in the equipment . 



Disassemble nozzles, clean screens, and store screens and nozzle parts dry or 

 immersed in a jar of fuel oil. 



Drain pump thoroughly and then coat the inside with a rust -proofing material such 

 as soluble oil or regular auto radiator rust inhibitor. This will prevent a stuck 

 pump. Be sure pump is dry so it will not be damaged by freezing. 



If tank is susceptible to rust, also rinse or spray-coat the interior with soluble 

 oil in water or other rust inhibitor. Do this whenever sprayer will be idle for 

 a few days. 



Support boom so it won't be damaged by other machinery. Avoid leaving aluminum 

 boom material in contact with soil or manure accumulations. 



Remove hoses, wipe clean of oil, and store them inside, coiled neatly in a 5 -gallon 

 pail or straightened out on a shelf. Avoid sharp kinks or hanging over a nail.-- 

 From R.E. Doersch and O.I. Berge , University of Wisconsin. 



PLANT DISEASES 



SPRAYING FOR SOUTHERN CORN LEAF BLIGHT 



ihould corn be sprayed to protect it against southern corn leaf blight? That is the 

 [uestion that farmers are now asking scientists at the University of Illinois. Per- 

 laps the following will help you decide: 



.. The suggested fungicide only gives protection. It does not eradicate infection 

 present now on the leaves, ears, and stalks. Thorough coverage of all parts of 

 the plants is essential. 



1. No fungicide can be applied to corn that will be used as forage for dairy animals 

 or animals being fed for slaughter. This means that only corn being harvested for 

 grain can be sprayed with a fungicide. 



i. Spraying will probably be of most value to late -planted corn that is not yet 

 approaching the dent stage. 



If corn has not dented, if the upper 5 leaves are free of southern leaf blight 

 spots, and if less than 10 to 15 percent of the plants are affected, then 2 or 

 more sprays applied at 7- to 10-day intervals--or until the corn is in the dent 

 stage --may protect the plants against serious infection. 



i. The suggested fungicide to use on corn intended for grain, to protect it against 

 southern leaf blight, is 75-percent wettable zineb (sold as Dithane Z-78, Parzate 

 C Zineb Fungicide, Ortho Zineb, Miller Zineb, Niagara Zineb, etc.). The manu- 

 facturer's recommendations as regards amount to use per acre (2 to 3 pounds) should 

 be carefully followed. Federal agencies only permit use of zineb. 



'. To ensure coverage of the foliage, use 5 gallons or more of water if spraying by 

 airplane and 20 gallons or more if using ground equipment. High-clearance sprayers 

 are probably preferable if available. 



