354 EXPERIMENT STATION RECORD. 



The Colorado laws governing horticultural inspection, also regulations 

 and formulas adopted by the State Board of Horticulture {Ann. Riit. lUt. 

 Hurt. Colo., f90S, />/>. 8ij-100). — The regulations and formulas adopted by the 

 State Board of Horticulture and the Colorado laws governing horticultural 

 inspection are accompanied by brief descriptions of the more important 

 iiisfct posts. 



Report of the division of entomology and botany, W. Saunuf.ks {('(iiuuld 

 III lit. Farms Riifa. 1!)09, pp. 37-().'i, pi. 1). — The preface to this report gives a 

 brief review of the work of the late entomologist and botanist, Dr. James 

 Fletc-lier, whose death has been previously noted ( E. S. R., 20, p. COO). 



In an effort to prevent the introduction of the brown-tail moth in shipments 

 of nursery stock 1,503,129 plants were examined in the provinces of Ontario and 

 Quel)ec, largely fruit seedlings, apples, pears, plums, and cherries, either for 

 grafting or budding. On these 19G nests were found, all on stock imported 

 from France, 100 being on pears, 5G on apples, 28 on plums, 5 on quinces, 2 each 

 on roses and spir;i';is, and 1 each on the sugar maple, cherry, and Pruniis 

 Itissardi. 



An account of the brown-tail moth is reprinted from the report for 1906 (E. 

 S. R., 19, p. 959). Experiments with hydrocyanic-acid gas to kill the larvae of 

 the brown-tail moth, by A. Gibson (pp. 48, 49), indicate that this gas can not 

 be relied upon as a practical remedy for the pest in its winter condition. 



The chief insects of 1908 are reported upon by A. Gibson (pp. 49-63). The 

 wheat jointworm (Isosoma tritici) was present in considerable numbers in 

 some parts of western Ontario. The grain aphis ( Macrosiphnvi f/rauaria) was 

 very prevalent in many parts of Ontario and Quebec. The clover-seed midge 

 (Cccidoniijid Icf/itniiiticola) was a source of considerable injury in districts of 

 Ontario wlici-o clover is grown for seed. The hop flea-beetle {PsijUiodes punc- 

 tulata) again did extensive injury to hop plants in the large yards in British 

 Columbia, where during the last 3 years, fully three-fourths of the hops grown 

 have been destroyed by this pest. The Hessian fly and chinch bug did but 

 little injury. The small white cabbage butterfly (Pontia rapa) was prevalent 

 throughout Ontario, Quebec, and New Brunswick. Pyretbruni, 1 lb. in 4 lbs, 

 of cheap flour, was recommended as a remedy. Cutworms were present in 

 injurious numbers in many districts throughout the Dominion, the dark-sided 

 cutworm ( Para gratis mcssoria) and the red-backed cutworm (P. ochrogaster) 

 being responsible for most of the damage. 



In eastern Ontario and Quebec, the apple leaf hopper (Empoasca mali) very 

 seriously injured potatoes, beans, and other plants. It began to make its 

 presence apparent toward the end of June by causing the leaves of the at- 

 tacked plants to curl up and turn brown. Potatoes which were sprayed with 

 whale-oil soap or kerosene emulsion before the young leaf hoppers had acquired 

 their wings were freed fi-om the pest and not injured to any appreciable extent. 

 As the i)est feeds on the lower side of the leaves it was necessary, in order to 

 reach them with a spray, to attach the nozzle to a short joint of pipe about a 

 foot long, having an angle of about 45° in it. The severity of the outbreak was 

 thought to have been influenced by the exceptional drought and heat which 

 weakened the plants and made them more than usually susceptible to injury. 



The destructive pea aphis {Ncctaropliora pm) appeared in enormous num- 

 bers in August and caused serious injury to the pea crop. Various remedial 

 niea.sures were tried, the brush and cultivator method being found the most 

 effective. Another method tried with considerable success consisted of using 

 a brush which dislodged the insects so that they fell into a pan containing 

 coal oil and water drawn between the rows of peas. In this way a bushel of 



