REPORT OF THE ZO()LOGIST. 87 



millers. This is do doubt due largely to the depression in the price of wheat 

 and consequently old wheat has been summered over for better prices. In 

 this way new wheat is often put in the same bin on the old, or close to it. 

 The mixing of new wheat with old is a great mistake, as the bins sliould be 

 thoroughly cleaned before they are ready for the new wheat. The 

 insects breed in the bins and are not brought from the fields in new wheat 

 as many suppose. Of course bisulphide of carbon is the remedy to kill 

 the weevils when they are once in the grain. 



Our most subtle and pernicious pests the past season, judging from the 

 absence of live clover in the fields last fall, and the absence of seed in the 

 heads, are the two clover insects known as the clovor root borer {Hylasies 

 trifolii) and the clover seed midge (Cecidomyia leguminicola). For the 

 last two or three years farmers have complained of having no clover seed 

 in their fall crop, where they had previously had a full crop, but up to the 

 past season the root borer has attracted little attention. At present its 

 work is even more serious than that of the seed midge as it is becoming 

 fully as much spread over the state, and by its work kills the plant in the 

 second year's growth by attacking the roots. Theoretical remedies have 

 been suggested which have never been tested by practice to my knowledge. 

 It is to be hoped that some practical measure may be found for their con- 

 trol, but such a measure will probably be much more difficult than it first 

 appears owing to our clover fields being so extensive and numerous. 



From various reports and letters of inquiry the southwestern part of the 

 state appears to have suffered considerably from an attack on grapes by 

 the berry moth {Eudemis hoirana). This is generally rather of a rare 

 pest compared with the grape vine flea beetle (Haltica chalybea) which 

 was also reported in several instances, but the berry moth at least attracted 

 more attention. The grapes attacked by this caterpillar are readily recog- 

 nized among the green ones by the dark color, much like a ripe grape, and 

 on opening the grape a light colored caterpillar, nearly one-fourth of an inch 

 long will be found. The grapes, so darkened, should be picked and de- 

 stroyed, and a good precaution is to keep the vineyard free from fallen 

 leaves and rubbish during winter. 



Another grape vine insect not usually known, was found at Tecumseh 

 sucking the sap from the leaves in such great numbers that the 

 leaves and entire plant were suffering from the attack. These little leaf 

 hoppers are quite small, little more than an eighth of an inch long, and are a 

 yellowish white with three black cross bands. This gives them the name, 

 three lined leaf hopper, or Typhlocyha iricinda. A spray of kerosene 

 emulsion readily subdued them. 



A five acre field of raspberries at Clio was reported as suffering from an 

 attack of the raspberry saw fly {Monophadniis ruhri). Spraying with 

 arsenites was recommended. 



The little peach bark beetle {Phlocotribus liminaris) has again made its 

 appearance in the vicinity of South Haven. It works in the trunk and 

 limbs of live trees, and the little holes made through the bark by it. 

 resemble the perforations made by fine shot fired into the tree from a gun . 

 Whole orchards have been killed by its work. We hope it will not become 

 extensive. 



Many other more common pests such as the canker worms, white marked 

 tussock moth, plant lice, carpet beetles, etc., were also reported in their 

 season as doing damage, but these are so common and often spoken of that 

 it is hardly necessary to mention them farther. 



