327 



army- worm) was given in the last Annual Report. The next brood 

 appeared early in July, and was very destructive over the whole of 

 Northern Florida, as well as in many other Southern States. The 

 August brood was not nearly so abundant. Alabama argillacea (the 

 cotton-leaf caterpillar) has been reported in Suwannee County. 

 Although larger broods were found at Live Oak, Gainesville and other 

 places, no general destructive infestation has occurred. Some cater- 

 pillars of Mods {Remigia) repanda were found infesting Italian 

 rye-grass. Tetranychus bimaculatus severely infested strawberries and 

 T. mytilaspidis occurred on citrus and camphor. Hemichioyiaspis 

 minor occurred on a new host. Asparagus plumosus. The Anthribid, 

 Brachytarsvs variegatus, attacked velvet bean seed and is becoming 

 more abundant. 



Hewitt (C. G,). Control of Insect Pests in Manitoba. — Manitoba Agric. 

 College, Winnipeg, Circ. 26, October 1914, 12 pp. [Received 

 3rd May 191-5.] 



Observations extending over a series of years have shown that insect 

 pests destroy on an average from 10 to 25 per cent, of the total crops. 

 Cutworms were very destructive in 1914 in Southern Alberta, destroying 

 about 35,000 acres of grain. New areas of settlement and cultivation 

 provide food for native insects and new lands for immigration of 

 invaders. The effect of such invasions is to increase the cost of pro- 

 duction, the increase being due to actual destruction of the crop and 

 the cost of prevention by spraying. Measures essential to insect control 

 are either preventive or eradicative, but before either can be employed 

 the habits, method of attack and susceptible points in the life-history 

 of the pest must be known. Preventive methods aim at stopping the 

 introduction and spread of pests and at protecting the plants them- 

 selves. Manitoba is protected against introduction of insect pests by 

 the establishment of the inspection station in Winnipeg. The most 

 important of all measures for the prevention of spreading is clean 

 cultivation. The encouragement of insectivorous birds is of consider- 

 able value. To illustrate the method of eradication, measures which 

 have been taken to destroy the chief insect pests of horticulture and 

 forestry in Manitoba are described. Grasshoppers are destroyed by 

 scattering horse-droppings poisoned with Paris green. Cabbages may 

 be protected from root maggot {CJiortophila hrassicae) by means of 

 tarred felt-paper disks placed round the stems of the plants ; the adults 

 are thus prevented from depositing their eggs on the roots. Cutworms 

 can be readily killed by poisoned bran mash scattered around the 

 young plants. The larch sawfly {Lygaeonematus erichsonii) is a 

 dangerous forest insect, but if restricted to a small area can be 

 controlled artificially. If spread over a large extent its natural enemies 

 must be rehed on to check it. 



Garcia (F.). Report of the Director.— 2oth Ann. Rept. Agric. Expt. 



Sta.,New Mexico College of Agric., Las Cruces, N. M., 1913-1914, 



pp. 80-83. 

 During 1913-1914 the investigations into the life-history of Typhlocyba 

 conies and its control have been almost completed. Measures for the 

 control of Anarsia lineatella, the peach worm, could not be carried 



