2vS9 



(cotton worm), and Hcliothis obsoleia. The pests of stored grain and 

 seeds are :Silvanus sunnamensis (saw-toothed grain beetle) • Calandia 

 granaria igranary wee^'il) ; Tenebroides maimtaniciis ' (cadelle) • 

 Bruchus spp. ; Srtotroga cerealella (Angoumois grain moth) • Plodia 

 interpunctella (Indian meal moth) ; Epiiestia kuhniella (Mediterranean 

 flour moth); and Pyralis farinalis (meal snout moth). 



MuMFORD (F. B). Work and Progress of the Agricultural Experiment 

 Station for the year 1st July 1918 to 30th June IQl^.—Missovti 

 Agnc. Expt. Sia., Columbia, Bull. 172, Tune 1920 48 up -yiies 

 [Received 18th March 1921.] ^^" ^ 



In the section of this bulletin dealing with the acti\'ities of the 

 lintomological Department the various investigations undertaken am 

 briefly outhned. Experiments for the control of the corn-ear worm 

 iHdwthis obsoleta] show that dusting is cheaper than spraying but 

 that neither method completely destroys this moth, although its 

 ravages in the treated areas are thereby greatly reduced 



The melon aphis [Aphis gossypii] can be controlled bv sprayin- 

 with nicotine sulphate ; this spray also gave the best results agaiu'.'t 

 the squash stink-bug [Anasa trislis]. A spray consisting of 2 lb 

 lead arsenate and 50 U.S. gals, of water is advocated against the 

 siriped cucumber beetle [Diabrotica vittala]. 



The best results in the control of codling moth [Cvdia pomonclla\ 

 were obtained with a disc nozzle at a pressure of 85 lb.', the percentaoe 

 of end worms being 1-89, as against 8-74 with a pressure of 200 lb 

 with the same nozzle, or 11-01 with similar pressure and Bordeaux- 

 nozzle. The San Jose scale [Aspidiotus perniciosus] is the most 

 serious pest m Missouri, but owing to systematic inspection work and 

 co-operation, it has been practically eradicated from nurseries. 



Nursery and Orchard Insect VQ^is.—Missonri Agnc Exbt Sta 

 S Mamhl921.r^^ ^''^^''' ^^^^' ^' ^'^■' ^^ ^^'- ^^'''^''^ 



The insect pests are arranged under the crop attacked, with a brief 

 description of injury and remedial measures. The species dealt with 

 include the apple pests i—fnosoma {Schizoncitra) lanigeriim (root 

 ouse) ; Saperda Candida (round-headed borer) ; Chrvsobothris femorata 

 (tlat-headed borer) ; Scolytus rugulosus (shot-hole borer) ; Aspidiotus 

 permcwsus (San Jose scale) ; Ceresa hubalus (buffalo tree-hopper) • 

 Ubicen septemdecim (periodical cicada) ; Alsophila pometaria Ad 

 Faiacacnta vcrnata (canker worms) ; Thvridoptcrvx cphemcraeformis 

 ibagvvorm) ; Tor^n^ {Ar chips) argyrospila (leaf-roller); Mincola 

 indigmella (leaf-crumpler) ; Empoasca mall (leaf-hopper) ; Empoa 

 rosae ^rose-leaf hopper) ; Lygus pratcnsis (tarnished plant-bug) ; 

 L.ydia {Larpocapsa) pomoneUa (codling moth) ; Conotrachclus nenu- 

 piiay (plum curcuho) ; Enarmonia prunivora (lesser apple worm) ; and 

 Ant/wnomus quadrigibbiis (apple curculio). 



Enocampoides limacina (pear slug) is recorded on pears ; Aegcria 

 [bannmoidea) exitiosa (peach-tree borer), Anarsia lincateUa (peach- 

 twig borer) and Anuraphis {Aphis) persicacnigcr (black peach aphis) 

 on peaches; Aphis sctariae (rusty brown plum aphis) on plums 

 cherries and peaches ; .1/a-/^s m-asV (cherry aphis) and Aspidiotus 

 forbesi (cherry scale) on plums and cherries. ' Cxrapeswere attacked by 



