188 



Lepidosaphes ceanothi on Ceanothus spp. ; Aspidiotus covilleae on 

 Covillea glutinosa ; and Targionia covilleae (described as Chrysomphalus 

 covilleae, but referred to the genus Targionia in the supplement) 

 on Covillea glutinosa. 



Pettit (R. H.). Report of the Entomologist. — 57th Ann. Rept. {1st 

 Juh/ 1917 to 30th June 1918) Michigan State Bd. Agric, Lansing, 

 1919, pp. 278-280. [Received 3rd March 1920.] 



The potato aphis [Macrosiphum. solanifolii] caused considerable 

 trouble during the year, the insect being difficult to reach with a 

 spray owing to its habit of resting on the underside of the leaves. 

 Against the onion maggot [Hylemyia antiqua] poisoned syrup baits 

 have been used with much success. Weather conditions were very 

 favourable in 1917 to the bean maggot [Phorbia fusciceps], and smaller 

 numbers were present in 1918, but undoubtedly the shallow seeding 

 of beans and the proper preparation of the seed-bed resulted in saving 

 a large proportion of the crop. The staUc borer, Pajxiipema nebris 

 (nitela), has done considerable damage to maize, tomatoes, potatoes 

 and some other crops. Cutworms, wireworms and white grubs were 

 all rather abundant and a species of Sitones is increasing as a clover 

 pest in various parts of the State. In some countries grasshoppers 

 are causing considerable trouble and the high prices of poison-bran 

 materials render control an expensive matter ; it is hoped that the 

 numbers of bhster beetles [Epicauta] reported from the infested 

 regions may be a distinct help in destroying the grasshopper eggs. 

 A Lepidopterous borer in maize that appeared in 1917 has now been 

 determined as Oligia (Noctua) fmctilinea, which is a serious pest in 

 the more southern States. 



The greatest menace however is that of the wheat jointworm 

 [Harmolita tritici] which is now well estabhshed in the State. Much 

 is hoped from the parasites of this insect which are appearing in large 

 numbers. The pest producing blemishes on elbertas has now been 

 identified as the flower thrips, FranJdiniella (Euthrips) tritici, while 

 that deforming gooseberries is an Aphid, Macrosiphum cynosbati. 

 Further information will be pubhshed about these pests. The breeding 

 of parasites of scale-insects is progressing. 



An investigation is being made into possible means of controlling 

 the cockroach, Periplaneta americana, which does not respond to the 

 ordinary methods of cockroach control. The tamarack saw-fly 

 [Lygaeonematus erichsoni] is apparently being held in check by at least 

 one Hymenopterous parasite and by the fungus, Isaria farinosa, 

 introduced for that purpose some years ago. 



Halligan (C. p.) & Pettit (R. H.). Spray and Practice Outline 



for Fruit Growers. — Michigan Agric. Expt. Sta., East Lansing, 

 Spec. Bull. 86, 1918, 22 pp., 6 figs. [Received 3rd March 1920.] 



The purpose of this bulletin is to specify the correct times for the 

 apphcation of sprays and the proper materials to use for the insects 

 and diseases that may be expected on fruits in Michigan. Directions 

 for making the sprays and instructions for general treatment of the 

 principal crops are included. 



