46 



NUR.SI•:K^• 1 XSIM-XTK )X 



DuriiiL;" tlic past season, the usual insect pests were in evidence, although 

 the poplar heetle (Melasoma scripta) did not do as much damage as in 

 former years, partly due to the seasonal weather conditions and partly due 

 to improved methods of control which some of our nurseries employed. 



A pest which has not been in evidence to any extent heretofore (found 

 in nurseries in southern part of state previous to this F. L. W.), hut which 

 was very alnmdant this year, was the woolly aphis which was found on 

 apple, mountain ash, hawthorn, and elm. The oyster shell scale is abun- 

 dant in some localities, although it has apparently done no great amount of 

 damage where found. It is easily controlled and should be exterminated. 

 Plum and apple aphis were also abundant and the red-humped caterpillar 

 on appl.e was found several times. The snowl)all and high bush cran- 

 berry in most cases were affected to an extreme extent with green aphis. 

 The raspberry Byturus was, as always, very much in evidence, as were mites 

 and aphids on boxelder. One or two cases of saw Hy on blue spruce, both 

 Kosters and Colorado, were reported. 



The following list gives the record of the various pests and host plants 

 \\'hich were fouml in nurseries during the last season: 



On Apple 



Aphis 



Buffalo tree liopper 



Oyster shell scale 



Red-humped apple-tree cater- 

 pillar 



Round-headed apple borer 



Saddle-back caterpillar 



San Jose scale 



Trumpet leaf miner 



Scurfy scale 



Woolly aphis 

 Ash (Green) 



Aphis 

 Ash (Mountain) 



San Jose scale 



Woolly aphis 

 Boxelder 



Alite work 



Aphis 

 Compass Cherries 



Red-humped ai)ple-tree cater- 

 pillar 

 Currant (Red) 



Aphis 



Saw llv 

 Elms 



Cockscomb gall 



.Aphis 



Scurfy scale 



Woolly aphis 



San Jose scale 



Grapes 



I'hj'llcixera 



Lilac borer 

 Plum 



Aphis 



Black aphis 



Curculio 



Red-humped apple-tree cater- 

 pillar 



Scurfy scale 

 Poplar 



I'ojdar beetle 

 Raspberry (Red) 



I '>y turns 



Snow\- tree cricket 

 Snowball 



Aphis 

 Spirea 



A]>his 

 Strawberries 



Leaf curler 



Nematodes 

 White Pine 



White I'ine blight (Aphid) 

 Willow 



Aphis 



Poplar beetle 



PLANT DISEASES 



Apple 



Cedar rust 

 Fire blight canker 

 Heart rot 

 Scab 



Shot hole fungus 

 Tipburn 

 Currant (Red) 

 Leaf rust 



Plum 



I'lrown rot (on twigs) 



Mildew 



Shot hole fungus 

 Raspberries (Black cap) 



Anthracnose 



Crown gall 

 Raspberries (Red) 



.Anthracnose 



