216 THE MONTHLY BULLETIN. 



MISCELLANEOUS INSECTS. 



The Cabbage Worm. 



Cabbage leaves full of holes and covered with dark excreta call our 

 attention to the velvety green worms of the calibage butterfly. The 

 adults of these caterpillars are the white butterflies so common in the 

 cabbage patches. Before the plant begins heading, Paris green, one 

 part, bran 40 parts, mixed well and dusted on the leaves may be used, 

 or after plants are heading out. use white hellebore, one ounce to two 

 gallons of water. 



The Harlequin Cabbage Bug. 



The harlequin cal)bage bug is known to us all as the bright yellow and 

 black sucking plant bug. The leaves turn yellow where the insects have 

 been feeding. If possible hand-pick adults and destroy them when 

 clustered on a few plants, or plant trap crops which can be later pulled 

 up and destroyed. 



The Graperoot Worm. 



The work of the graperoot worm consists of the eating out of chain- 

 like strips from the leaves and shoots of the grape by the adult beetles, 

 and the destruction of the roots by the larvie. The beetle is brown or 

 black in color, about three fourths of an inch in length, and appears 

 during the last part of April on into June. Destroy the beetles by 

 poisoning them with an arsenate of lead spray. 3 to 5 pounds to 50 

 gallons of water. Spraj' as soon as beetles appear in order to kill them 

 before they lay their eggs. Several applications may be necessary. 

 Jarring the adults into receptacles containing oil is also used as a means 

 of control. 



The Grape Leaf Hopper. 



Another insect attacking the foliage of the grape is the grape leaf 

 hopper. The adults are about one tenth of an inch in length, pale 

 yellow in color and marked with red in an irregular pattern. To 

 destroy the leaf hopper use black-leaf 40, half pint, water, 100 gallons, 

 maintaining high pressure and thoroughly drenching the vines. An 

 angle nozzle is necessary so that the undersides of the leaves can be 

 well covered. 



The Alfalfa Caterpillar. 



The alfalfa caterpillar is the larva of the orange yellow and black 

 butterfly frequently met with in the alfalfa fields. They are greenish 

 worms with a white stripe on each side of the body. They feed on the 

 leaves and buds. • The best method used to combat this insect is to cut 

 the crop low and clean as soon as the worms are nearly well grown (about 

 one inch in length). This will cut off their food supply and conse- 

 quently many of them will die. Do not leave the alfalfa standing along 

 the roadsides, ditch banks and fences, as the caterpillars will breed 

 uninterrupted on these plants. If the irrigation water is left off the 

 fields for a week or so after cutting, no green growth will appear and 

 the worms that have fallen to the ground will starve to death or will be 

 killed by the heat of the sun. 



