spray to the foliage. Use 2 teaspoons of 50 -to- 5 7 percent malathion or 2 5 -percent 

 diazinon per gallon of water. Do not use malathion on African violets or cannaert 

 red cedar. Do not use diazinon on ferns or hibiscus. Repeat treatments may be 

 needed. 



Oystershell scale hatch is about complete in the central and southern sections, 

 and the new crawlers are getting ready to set up housekeeping on shrubs like lilac, 

 dogwood, etc. In the northern sections, it will be another two weeks (June 15 be- 

 fore hatch is complete. They can be controlled by a careful and thorough spraying 

 with malathion (2 teaspoons of 50 -to- 57 percent concentrate per gallon of water) . 

 An additional treatment will likely be needed in mid-August for second- generation 

 crawlers. Even though scales are killed by spraying, the scale covering will per- 

 sist for several months. 



Spruce spider mites are attacking evergreens. Injured evergreens show pale patches, 

 even some killing of branches. Silken threads or webbing are usually present. 

 To detect mites, hold a sheet of white paper under a branch and strike sharply. 

 If mites are present, you will be able to see them moving about on the paper. To 

 control spider mites, spray with dicofol (Kelthane) at the rate of 2 teaspoons of 

 18.5-percent emulsion concentrate per gallon of water, or aramite at the rate of 

 1 teaspoon of 15-percent wettable powder per gallon of water. Malathion is also 

 partially effective against spider mites. 



Chiggers may be a problem soon. They annoy campers, picnickers, hikers, fisher- 

 men, berry pickers, and even homeowners in their own yard on occasion. 



When entering possible chigger- infested areas, use a repellent such as DEET (di- 

 ethyltoluamide) . Take a warm, soapy shower or bath immediately after returning 

 from a chigger- infested area. It takes the mites several hours to penetrate into 

 the skin; they can often be washed off before becoming embedded. 



To reduce chigger infestations in a home yard, spray lightly over grass, low 

 flowers, and shrubs with either malathion or diazinon. 



Don't let fleas get a start in and around your home. Fleas develop in debris in 

 the resting areas of dogs and cats. The worm stage (larva) of fleas will live and 

 feed in such places as rugs, upholstered furniture, and dirt in flower and shrub- 

 bery beds. The worm stage is usually not noticed and is harmless, but adult fleas 

 suck the blood of warm-blooded animals. Your dog or cat constitutes a walking bait 

 station for fleas. Dust your dog or cat at least once each month during the warm 

 periods (May to October) with either 4-percent malathion or 5-percent carbaryl 

 (Sevin) . This will usually prevent fleas from becoming a nuisance in your home 

 or yard- -a frequent problem by late summer. Once or twice during the cooler months 

 (November to April) , dogs and cats should also be dusted with one of these same 

 insecticides for additional protection. 



Caution to Homeowners Using Lindane Vaporizers 



These electrical vaporizing units containing pelleted or crystalline lindane are 

 being used as a means of controlling certain insects in homes and commercial es- 

 tablishments. There are two types of vaporizers that have federal label clearance. 



1. One is a continuously operated type for use in industrial or commercial build- 

 ings only, not for home use. Prominent warnings against home use are required. 



