238 



Peas and Beans 



black spots arranged in three transverse rows. The beetles 

 riddle the leaves with holes and attack the pods and blossoms. 

 Eggs are laid on the underside of the leaves and the larvae 

 skeletonize them. There are one or two generations annually, 

 depending on the length of the season. Control: In the home 

 garden the beetles may be handpicked or the larvie brushed 

 off on the hot ground, where they will perish before regaining 

 the plant. In larger fields the plants may be protected by 

 spraying with arsenate of lead, 8 pounds of paste or 4 pounds 

 of powder to 50 gallons of water, adding 4 pounds of lime to 

 prevent burning of the foliage. Care should be taken to hit 

 the underside of the leaves. It is sometimes advisable to plant 

 the crop either early or late to avoid the insects, when they 

 tire numerous. 



Bean thrips (Heliothrips fasciatus). — In the Far West 

 beans are sometimes seriously injured by a minute thrips. The 

 insect is only about 1/24 in. in length and is black. The 

 insects rasp and puncture the tissues, causing the leaves to 

 turn yellowish or white, dry up and die. Control: Early 

 planting and thorough cultivation will produce a rapid growth 

 and help the plants to outgrow the injury. In the garden 

 the plants may be sprayed with " Black Leaf 40 " tobacco 

 extract, 1 part in 800 parts of water, to which enough soap 

 has been added to give a good suds. 



Bean aphis {Ai)his rumicis). — This black plant-louse passes 

 the winter in the egg stage on evonymus, syriuga, snowball 

 and deutzia, from which it migrates in the summer to many 

 vegetables and several common weeds. Control: On beans the 

 lice may be controlled by spraying with " Black Leaf 40 " 

 tobacco extract, 1 part in 100 parts of water, to which enough 

 soap is added to give a good suds. 



Striped green bean caterpillar (Ogdoconta cinereola). — 

 Bean vines are sometimes stripped of their foliage and pods 

 by a pale green looping caterpillar striped with whitish and 

 yellowish longitudinal lines. When mature, it is almost an 

 inch in length. Control: The caterpillars may be poisoned by 

 spraying with arsenate of lead .(paste), 5 pounds in 100 gallons 



