398 



Sanboen (C. E.) & Painter (H. R.). The Locust Borer {Cijllene 

 robiniae, Forst.) — Oklahoma Agric. & MecJiam. Coll. Agric. Expt. 

 Sta., Stillwater, Bull. no. 113. March 1917, 8 pp., 4 figs. 



In Oklahoma, where locust trees are grown for posts as well as for 

 shade, the growing of first-class trees is a diflUcult problem owing to the 

 damage done by the locust borer. The adult beetles appear about 

 the middle of September and feed on the pollen of flowers, particularly 

 of the common golden-rod. They are active during the warmer part 

 of the day, descending to the ground for the night. Eggs are placed 

 in crevices in the bark, or in an old wound, and hatch in 6 or 7 days. 

 The young larva bores through the bark and tunnels in the wood until 

 the weather becomes cold, when it ceases its activities and remains 

 dormant throughout the winter. During the autumn, the presence 

 of larvae can often be detected by small moist spots on the bark and 

 small masses of sawdust pushed out by young borers through the 

 opening of their tunnels. In the spring the larvae again become active 

 and burrow deeper into the tree, often penetrating the heartwood. 

 They reach maturity about mid- August, when pupation takes place 

 in the tunnel and lasts 10 to 14 days. Adults sometimes remain in the 

 tunnels for some time before emerging. Dead larvae found in tunnels 

 appear to have been attacked by some disease, but no definite con- 

 clusions have been reached in this respect. The wheelbug, Prionidus 

 cristatvs, feeds on the adults, but is not effectual in controlling an 

 infestation. The pest can be reduced to a marked extent by the 

 destruction of all golden- rod in the vicinity ; but as this is a very good 

 honey plant, the method is objectionable where bees are kept. A 

 coating of whitewash applied to the trunk and main branches during 

 late summer will check oviposition. All cracks and crevices in the 

 bark should be filled with the mixture. Tanglefoot is ineffective in 

 capturing the beetles. 



A bibliography of 24 works is given. 



Painter (H. R.). The San Jos§ Scale. — Oklahoma Agric. & Mechan. 

 Coll. Agric. Expt. Sta., Stillwater, Circular no. 41, April 1916, 

 7 pp., 3 figs. 



Aspidiotvs perniciosus, Comst., was first recorded in Oklahoma in 

 1904, the insects being active from the commencement of spring growth 

 of the trees until November. The life-history of the scale, probable 

 means of distribution and the usual methods of control are discussed. 

 Stringent laws relative to the importation of infested stock are in force. 

 "When young trees are being transplanted it is advisable to dip them in 

 the lime-sulphur solution used for spraying, the roots only not being 

 immersed. Lady-birds and other insect parasites, as well as fungus 

 diseases, efiectively check the increase of the scale. 



Protection of Crops. — Canada Dept. of Agric, Ottawa, Crop Protection 

 Leaflet, no. 1, May 1917. 



This Government leaflet calls attention to the fact that Canada loses 

 over one hundred million dollars worth of staple crops every year 

 through the depredations of insect pests. The Department of 

 Agriculture urges the necessity of reporting insect outbreaks or^^of 



