Maple bladder galls are numerous on the leaves of soft maples. These reddish to green 

 growths are caused by tiny mites which burrow into the leaves emerging in the spring. 

 The irritation by the mites causes the swelling to develop around them. These galls 

 rarely cause damage to trees. It is too late to attempt to control these gall makers 

 this year. Spraying with malathion next spring just before new leaves appear will con 

 trol this pest. 



Cicadas , or 13 -year locusts, are singing loudly in and around areas in many locations 

 in southern Illinois. They are laying eggs in slits made in small branches and twigs. ] 

 If treatment is necessary to reduce egg-laying damage, the only suggested insecticide 

 is carbaryl (Sevin) used at 2 pounds of 50 -percent wettable powder per 100 gallons of 

 water or 2 tablespoons per gallon. Repeat in 5 days if needed. 



Euonymous scale crawlers are hatching and crawling onto new growth of euonymous, win 

 tercreeper, and pachysandra shrubs . Many crawlers appear as white specks on the new 

 foliage. Sprays containing malathion or diazinon will control this scale species. 

 Thorough coverage is important. Repeat the spray 10 to 14 days later. 



WEEDS 



CORN INJURY 



Sutan injury to corn seems to have occurred in a few more cases than usual this year. 

 Injured plants may appear somewhat swollen at the base and the tops, and may be gnarlet 

 and twisted. 



The injury can sometimes be explained by overlapping, by leaving the sprayer on when 

 turning at the ends of the field, or by other reasons for applying an excessive rate. 

 Certain corn hybrids may be a little more sensitive to Sutan than others. Soil and 

 weather conditions also may play a role. 



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Usually only a relatively small percentage of corn plants is seriously affected. Some . 

 plants may improve, but others may remain stunted throughout the season. Even though 

 they are stunted, some plants may produce ears. It is seldom necessary to replant. 



Treflan residue from one season may occasionally be sufficient to affect corn the 

 next season. Typical symptoms are stunted, purplish, or reddish plants with a drouthy 

 appearance and some abnormal roots. 



Some factors that contribute to Treflan residue are dry weather, minijmal tillage, stop 

 ping the sprayer while running, overlapping, or other reasons for excessive rates. 

 Usually we do not have many cases and we have few problems where correct rates were 

 accurately and uniformly applied. Corn may outgrow the injury fairly well, if it is 

 not too great. There appear to be some genetic differences in the ability of corn hy- 

 brids to tolerate Treflan. 



Corn does not tolerate Bladex quite as well as atrazine. We had one case of injury on 

 a light sandy soil from a preemergence application of Bladex. Symptoms are stunting 

 and browning of leaves, with considerable variation in the degree of injury, depending 

 on such factors as organic matter and rate. Much of the corn showed considerable im- 

 provement in a few days. 



Do not use Bladex postemergence on corn. 



