MISCELLANEOUS CROPS. 153 



Prevention. — Destroy nettles and other weeds. Clean 

 cultivation is essential for the growth, of hops. 



Cure. — See the remedies recommended for the " hop 

 aphis " and the " hop flea." 



The Hop Bug {Lygus umhellatarimi) also sucks 

 the juices from various parts of the hop-plant. It be- 

 longs to the Hemiptera (plant-bugs), and is about a 

 quarter of an inch in length. The elytra are of a 

 reddish colour. 



Prevention. — A thorough cleansing of the land after 

 the harvest greatly reduces the attacks of this injurious 

 insect. 



Cure. — Syringing and dusting the vines with the in- 

 secticides already mentioned destroy Lygus as well as 

 other hop-pests. 



The Pale Tussock Moth (Dasychira piodibunda). 

 The larva of this moth is known as the " hop-dog.'' It is 

 of a straw-colour, and the incisions between some of the 

 segments are deep black, like velvet. " On the fifth to 

 the eighth segments there are dense yellow tufts on the 

 back. On the twelfth segment a longer dull red tuft 

 appears." The larvae (each about 1| inch long) feed on 

 the leaves of hops and of various trees. In the autumn, 

 while on the hop-plant, they spin a slight cocoon, in which 

 they turn to the pupal stage. The pupae are transformed 

 into moths the following May. 



Prevention.— DestToj the cocoons by hand-picking, etc. 



Cure. — Syringe the hop-vines with the insecticides 

 already mentioned. 



The Ghost Moth {Hepialus humuli). The larvae of 

 this moth infest the roots of hop-plants. They are of a 

 cream colour with brown heads, and measure about two 

 inches in length when fully grown. They turn to pupae 



