mixing chlordane emulsion concentrate with the proper amount of water. Avoid spraying 

 near wells. 



This will control ants , spiders , Oriental cockroaches , and other pests that migrate in- 

 to the house from outdoors. 



Spiders . A foundation spray will provide control. As the spiders migrate into the 

 house in the fall, they usually cross the foundation. The number of spiders entering 

 the home will be greatly reduced if the foundation has been sprayed with chlordane. 

 We are still trying to determine where the brown recluse can be found in Illinois. 

 Send spiders to Dr. J.D. Unzicker, Room 93, Natural Resources Building, Urbana, Il- 

 linois 61801, for identification. 



WEEDS 



PLANTS SENSITIVE., TO 2 ,4-D 



Distorted and twisted leaves on tomato plants may be due to herbicide injury. 2,4-D 

 can cause damage to many broadleaf plants . Tomatoes , grapes , and red bud trees are 

 particularly sensitive. 2,4-D is quickly absorbed by the leaves and translocated in 

 the plant. Only a trace of the chemical is needed to harm susceptible plants. It does 

 not have to be sprayed on directly. 2,4-D carried by air currents may cause injury at 

 a distance of a mile or more from the sprayed area. The drift of 2,4-D fumes or spray 

 depends on the wind currents and other environmental factors . The degree of injury is 

 directly proportional to the concentration of the chemical to which the plant is exposed. 



A sprayer filled previously with 2,4-D (even though washed-out) may cause serious damage 

 if used later to spray susceptible plants. It is well to have two spray tanks- -one for 

 herbicides and another for other pesticides. 



The symptoms may not become apparent until 5 or 10 days after spray exposure, or until 

 the new leaves have expanded. The entire plant may die within 7 to 10 days, or the 

 chemical may just delay fruiting. Generally, the upper part of the stem becomes twisted 

 and the leaf petioles bend downward. 



Once a plant has been exposed to 2,4-D, nothing can be done to help it. Although di- 

 camba is more effective than 2,4-D on some weeds (smartweed, knotweed, and Canada 

 thistle, for example) , the risk of injury to nearby, desirable broadleaf weeds is al- 

 so usually greater. [Adapted from the North Dakota Pest Report.] 



2,4,5-T BAN COULD COST THE U.S. $52 TO $172 MILLION: USDA 



A ban on the phenoxy herbicide 2,4,5-T could increase costs to U.S. farmers and other 

 domestic users by $52 to $172 million, according to a recent study by the U.S. Depart- 

 ment of Agriculture. 



The lower figure would apply if 2,4,5-T should be banned and all other registered her- 

 bicides were available as alternatives. The $172 million figure would apply if no 

 phenoxy herbicides could be substituted for 2,4,5-T. 



Of the $52 million, $32 million represents added costs for controlling weeds and brush 

 on farms. Other domestic users --homeowners, utility companies, recreation, and timber 

 industries --would spend $20 million more. Note: all costs are based on estimated use, 

 prices, and alternatives as of 1969. 



The study notes that of the phenoxy herbicides, 2,4,5-T provides the most effective con- 

 trol of brush, other woody plants, and herbaceous broadleaf weeds. 



