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appear in late August. No control measures are being recommended at this time. 

 Half-grovn worms can now be found in corn in central and north-central Illinois. 

 Pupation for a second generation should take place the last week of July. 



Armyworm moths have been abundant around lights for the past two weeks 

 in central Illinois. If they follow the usual custom, they will migrate north- 

 ward to deposit eggs in grassy areas. VThether this oviposition will occur in Il- 

 linois cornfields, as it did last year, remains to be seen. 



Black cutworm moths are also migrating northward. Where they will de- 

 posit eggs also remains to be seen, but we do not expect a new generation to de- 

 velop in corn this year. 



Scavenger beetles , commonly referred to as picnic beetles , are now emerg- 

 ing and will soon be a nuisance in many areas. Areas that were dry in May should 

 have fewer beetles than normal, while areas having moderate moisture or above should 

 be more heavily infested. These beetles are about 1/k inch long, are shiny black 

 and have four yellow spots on their backs. Food odors attract them. They get into 

 food at picnics and cookouts. They swarm onto overripe or injured fruits and vege- 

 tables in gardens . They appear around garbage containers and on screen doors and 

 kitchen windows. Keep vegetables and fruits picked, and dispose of overripe or 

 damaged produce. Malathion or diazinon will give a degree of control on fruits 

 and vegetables. Check the label for application directions for each crop. If you 

 want to eat on an unscreened patio or on the lawn, it will help to apply malathion 

 or diazinon on shrubbery in the morning. The odor will dissipate by late after- 

 noon. Pyrethrins may also be used for control. 



Potato leafhoppers are small, wedge-shaped green insects that suck sap 

 from alfalfa as well as potatoes. Damaged alfalfa is yellow to purple and stunted. 

 The yield of damaged alfalfa may be similar tc that of undamaged alfalfa, but the 

 quality is quite different. Damaged alfalfa makes stemmy, poor-quality hay. 



Damage from this pest is now showing up in central and north-central Il- 

 linois. After damage is apparent, cutting is the only answer, since the damaged 

 growth will not recuperate. The new shoots will grow normally after cutting. If 

 leafhoppers are numerous and damage is not yet apparent, apply 1 pound of methoxy- 

 chlor per acre. Do not harvest for one week. 



House flies may soon become a nuisance now that many areas have had some 

 moisture. Control programs should be started now. Follow these three steps: 

 (1) Practice good sanitation; clean out fly-breeding areas, such as manure, rotting 

 straw, wet hay and feed as often as is practical (preferably once a week). (2) Ap- 

 ply a barn spray material, such as dimethoate (Cygon), diazinon or ronnel (Korlan), 

 to runoff on ceilings and walls of all livestock buildings. Use only ronnel in 

 poultry houses. Always cover all water and feed troughs before spraying, and do 

 not spray animals. (3) You may also want to apply a supplementary spray bait, 

 using the same insecticide mixed with corn sirup and water (2:1 ratio). Other 

 insecticide baits may be used as supplements to good sanitation and barn spraying. 

 This treatment will also control stable flies resting in and around livestock 

 buildings. 



Stable flies and horn flies are numerous on pastured cattle in many 

 areas. Face flies are still few in number but should increase from now until 

 September. 



