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STATE BOARD OF AGRICULTURE. 



AFFECTING THE CANES. 



The Grape Cane-borer. (Amphicerus bicaudatus.) 



Early in the spring, the young shoots of grape-vines, as well as those of apple, 

 pear, and sometimes those of peach and plum trees, are sometimes found to be 

 dying back for some little distance from the tip. An examination shows a 



Fig. 41 — .\pple Twig-borer or Grape Cane-borcr' and its work, from Riley, Third Rep. State 



Entomologist oi Mo. 



smooth, round burrow extending several inches from a neat opening which 

 usually is placed in the axil of a bud. This is the work of the grape cane-borer, 

 otherwise known as the apple-twig borer, the culprit is often found within the 

 burrow, it is a long slender beetle dull brown in color. As the insect breeds 

 in quite different quarters, it is difficult to conceive the object in thus tunnel- 

 ing the twigs. The work is shown by the wilting of the young leaves, due to 

 the death of the cane or twig. The beetles are one-brooded. 



REMEDIES. 



Cut out all twigs containing burrows, or if the cane be large and seemingly 

 strong enough to withstand the injury, kill the beetle with a slender wire. 

 Remove and burn all cutting>5 and dead or dying wood from the vineyard, 

 orchard, or vicinity, as the beetle breeds in such places. 



The Cottony Maple Scale. (Pulvinaria innumerabilis.) 



Fig. 42. — Cottony Maple ScaIe''on :!rrapo. Original. 



During the first half of the season, one often finds on the grape-vines, large 

 brown scales, each scale being tilted up somewhat at one end by a mass of 

 viscid cottony material sec-cted there. This mass of filaments is the nest in 

 which the eggs are laid. After a time the eggs hatch, the young lice make their 

 way to the under side of the leaves, and the nest is blown out by the wind into 

 long streamers like cobwebs. Later in the season, after the young become about 

 half grown, the females migrate back to the twigs, and the males meet them 



