420 



Caesar (L.) & Ross (W. A.). Insects of the Season in Ontario. — 

 51st Ann. Kept. Ent. Soc. Ontario, 1920, Toronto, 1921, pp. 35-43, 

 3 figs. [Received 15th June 1922.] 



In addition to the insects aheady mentioned in the preceding 

 papers, the following were recorded as orchard pests : Cydia pomonella 

 (codling moth), less abundant than in the previous 3'ear ; Aspidiotus 

 perniciosus (San Jose scale), increasing in neglected orchards, but 

 heavily parasitised in certain localities by Chalcids ; Lepidosaphes 

 nlnii (oyster-shell scale), greatly increasing in many orchards ; Tortrix 

 argvrospila (fruit-tree leaf-roller) ; Alsophila pometaria (fall canker- 

 worm), increasing rapidly in certain counties ; Empoa rosae (rose 

 leaf-hopper), more abundant than usual on apples ; Rhagoletis pomonella 

 (apple maggot) , reported from two counties not previously infested ; 

 a Scarabaeid, probably Hoplia trifasciata, attacking blossoms of apple, 

 trees ; ColeopJwra malivorella (pistol case-bearer), prevalent on apple 

 foliage ; Psylla pyricola (pear psylla), unusually abundant in some 

 districts ; Eriocampoides limacina (pear and cherry slug) ; Aegeria 

 {Sanninoidea) exitiosa (peach tree borer), causing more injury than usual; 

 Scolytus {Eccoptogaster) rugiilosiis (fruit-tree bark-beetle) injuring peach 

 trees ; Macrodactylus suhspinosus (rose chafer) occurring locally on 

 grapes, peaches, apples, etc. ; Myziis cerasi (black cherry aphis) 

 injurious to sweet cherries ; Tetranychns pilosus (plum spider mite) 

 heavily infesting plum trees ; and Hyalopterus arimdinis (mealy plum 

 aphis). 



The insects attacking grapes and small fruits included : Metallus 

 beihunei (blackberry leaf-miner) ; Anthonomus signatus (strawberry 

 weevil) ; Systena frontalis (red-headed flea-beetle) ; TypopJwrus canellus 

 (strawberry root worm) ; Janus integer (currant stem-girdler) ; Mono- 

 phadnus rubi (raspberry sawfiy) ; Typhlocyba conies (grape leaf-hopper) ;■ 

 and Diaspis {Aulacaspis) rosae (rose scale) and Oecanthus nigricornis 

 (tree-cricket) on raspberry canes. 



The vegetable pests included : Thrips tabaci (onion thrips), not 

 injurious owing to weather conditions ; Myziis persicae on potatoes, 

 controlled by spraying with Black-leaf 40 and Bordeaux mixture ; 

 Acvrthosiphon (Macrosiphum) pisi ; Papaipema nitela on maize and 

 potatoes ; P. cataphracta on maize and cultivated asters ; Melanotus 

 sp. boring in tomato stems ; Crioceris asparagi and C. duodecimpitnctata 

 (asparagus beetles) ; Enipoasca mali (potato leaf-hopper) ; Systena 

 taeniata, prevalent on tomatos, potatoes, beans, egg-plants, peppers, 

 and asters.; and Epitrix cucnmeris (potato flea-beetle) on tomato. 



Insects injurious to field crops were : AnaphotJirips striatns on 

 oats ; Meromyza americana (greater wheat-stem maggot), destroying 

 spring wheat ; Blissus leucopterus (chinch bug), greatly reduced by 

 the rains of the previous autumn ; and Eriopeltis festucae (cottony 

 grass scale). 



Greenhouse pests were : Diarthronomyia hypogaea (chrysanthemum 

 midge) ; Neocerata {Dasvneura) rhodophaga (rose midge) ; Tarsonemus 

 pallidas (cyclamen mite) ; Emphytus cinctipes (curled rose slug^l ; Lygus 

 pratcnsis (tarnished plant bug)"^on Aster : and Phlyctaenia fernigalis 

 (greenhouse leaf-t3'er) on Chrysanthemum and other plants. 



Insects injuring forest and shade trees and shrubs wTre : Bucculatrix 

 canadensisella (birch leaf skeletoniser), Tetranychns bicolor, Aphis 

 viburnicola and A. rumicis. 



