245 



Badly infested land may sometimes be cleared of them by deep autumn 

 ploughing, followed by plenty of cultivation and by summer fallow in 

 the following j^ear. In this case the land should be kept clear of weeds, 

 to starve the wireworms and prevent the adult beetles laying their 

 eggs. Another method is to plant balls of rice-meal between the rows 

 to act as traps [R. A.E.. A, vii, 171, 407]. 



Other potato pests are the larvae of June beetles [Lachnostcrna], 

 flea-beetles and cutworms, the usual remedies for which are described. 



Newell (W.) . On the Organisation o£ Work in Economic Entomology. 



— //. Econ. Ent., Concord, N.H., xiv, no. 1, February 1921, 

 pp. 36-48. 



The co-operation and co-ordination of all the agencies engaged in 

 economic entomological work is urged. When different agencies 

 work in co-operation, their activities should be regulated by one and 

 the same executive, to prevent duplication of efforts and waste of funds. 

 Suggestions are made for the organisation and working of such a 

 co-operative scheme, and its possibilities are discussed. 



Fracker (S. B.). a Volunteer Pest Reporting Service. — J I. Econ. 

 Ent., Concord., N.H., xiv, no. 1, February 1921, pp. 48-53. 



The advantages to be gained by the inauguration of a volunteer 

 pest-reporting service are discussed. A similar service has been tried 

 in Wisconsin, and the method of utilising the information obtained is 

 described. The value of the reports depends on the number and dis- 

 tribution of growers sending the information, its accuracy and the 

 promptness of its despatch. The organisation of such a service on a 

 national scale, with the establishment of permanent records, would 

 facilitate the study of insect losses. 



GossARD (H. A.) & Parks (T. H.). Hessian Fly Prevention. — //. 



Econ. Eni., Concord, N.H., xiv, no. 1, February 1921, pp. 53-60. 



An approaching outbreak of Hessian fly [Mayetiola destructor] may be 

 foreseen if a wheat survey by entomologists is undertaken just before 

 harvest. Such surveys have been organised annually since 1917 in 

 Ohio, and with the aid of the observations made at fly-emergence 

 stations in selected localities, it is possible to determine the safest date 

 for sowing wheat to prevent infestation. The response to the late 

 sowing campaign in 1920 was almost unanimous, less than 1 per cent, 

 of wheat being sown before the final dates chosen. Up to 14th October 

 no eggs were found on the young plants, but an unexpected appearance 

 of adult flies during mid-October over all except north-eastern Ohio 

 resulted in an infestation by eggs and larvae of about 20 per cent, of 

 the wheat. In spite of this heavy and belated infestation, the efforts 

 made have been fully justified, and it is estimated that the 1921 crop 

 will be twice as large as it would have been had no attention been 

 paid to the pest, 



Marcovitch (S.). The Potato Leaf-hopper and Tarnished Plant Bug 

 in 1916. — //. Econ. Ent., Concord, N. H., xiv, no. 1, February 1921, 

 pp. 61-62, 1 plate. 



During 1916 in Minnesota the author reached the same conclusions 

 as those of Ball in 1919 in connection with the potato leaf-hopper, 



