77 

 INSECTICIDES AND SPECIAL RECOMMENDATIONS. 



ARSENATE OF LEAD. 

 For Caterpillars, Beetles, and other Chewing Insects. 



or 



Prepared Paste, 50 per cent i to 2* pounds, i } to 4 ounces, 



or Powder ... i to ii pounds, 5 to 2 ounces. 



Water 40 gallons. 4 gallons. 



Safest and most generally used arsenical for living plants, yet is 

 liable to injure peach, beans, and some others. Work to thin paste 

 before adding to bulk of water. Keep agitated, and apply in very fine 

 spray under heavy pressure. Use full strength for cockchafers, kalanders, 

 grasshoppers, and hardy caterpillars ; and weakest for pear slug, 

 epilachna larvae on beans, and generally in spraying plants, experience 

 teaches, are injured by greater strength. For early Codling Moth spray- 

 ing, use one pound to 20 gallons, and for later one to twenty-five. Wipe 

 stains from fruit before packing, but amount of poison really too small 

 to harm consumer. Keeps in suspension, and adheres better than Paris 

 green and other common arsenicals. Advisable to accept only well-re- 

 puted brands in original packages. Paste formerly always superior to 

 powder, but some brands powder now appear equal to best paste. Paste 

 loses its peculiar advantages if once dries. So-called neutral arsenates 

 preferable where much trouble with leaf-scorching experienced. Use 

 purest water obtainable, avoiding brak. Adding equal weight of lime 

 does no harin, and sometimes seems beneficial. See arsenicals described 

 hereunder. 



PARIS GREEN AND SCHEELES' GREEN. 

 For Caterpillars, Beetles, and other Chewing Insects. 



or 



Prepared Powder 2\ to 4 ounces, ] to i ounce, 



Water 40 gallons, 4 gallons, 



Slaked lime (optional) about ... 8 ounces, i ounce. 



Mix and apply as directed for arsenate of lead. Scheeles' green 

 preferable to Paris green. These arsenicals require more agitating in 

 spray tank than arsenate of lead, are more apt to scorch foliage, and 

 do not adhere nearly as well, but are relatively more virulently poisonous 

 and less expensive. Lime added to diluted mixture Diminishes risk to 

 foliage. 



Sometimes used dry. Intimately blend at rate one pound to 25 pounds 

 with finely sifted dry-slaked lime, or flour which has advantage of ad- 

 hering better, and distribute with fan or bellows dust-blower, or through 

 bag of coarse cloth. 



ARSENITE OF SODA WITH LIME. 

 For Caterpillars, Beetles, and other Chewing Insects. 



or 

 Arsenite of Soda (preferably 80 %) 2 to 3 ounces, .] ounce, 



Water 4O gallons. 4 gallons, 



Quicklime (white 90% or higher) i to \\ pounds. 2 ounces. 



This is a cheap substitute for Paris Green and other factory-made 



arsenical spray preparations. It appears fully equal to Paris green in 



efficiency, but is very injurious to foliage when not properly made. Only 



recommended when necessity for low cost offsets risk, or when afore- 



