526 



emerge and oviposit on the grain. The other is to destroy the self- 

 sown wheat and delay sowing so that the period of oviposition will 

 be over by the time that the wheat is up. 



The best way to kill the fly in infested stubble, in which it occurs 

 in the " flax-seed " or pupal stage, is to plough early and at least 

 4 or 5 inches deep. If the ground is then worked with a disc, the 

 pupae will be buried so deep, and the ground above packed so firmly, 

 that very few individuals will be able to reach the surface. 



Burning the stubble also kills the few pupae above the ground, 

 but does not reach the majority that are below the surface, and this 

 cannot be recommended as a general practice both on this account 

 and because it destroys the organic matter in the stubble, which 

 is badly needed in most Kansas soils. 



Early deep ploughing, to be fully effective, must be practised by 

 the entire neighbourhood, and must include all infested fields, since 

 the flies frequently migrate considerable distances. As this is 

 often impracticable, the only way to ensure safety is by the avoidance 

 of early sowing. The destruction of self-sown wheat is also necessary, 

 since if this becomes infested, it affords a place of hibernation from 

 which the pest may spread to the fields in spring. 



The dates when wheat may be sown with small chance of injury 

 vary between the end of September and middle of October in different 

 parts of the State. Wheat sown on or about these dates on early- 

 ploughed and well prepared ground will usually escape attack by 

 the Hessian fly. 



Scott (R. J.). A Farmer's Remedy for the French Bean Fly. — 

 Queensland Agric. Jl., Brisbane, x, no. 1, July 1918, p. 9. [Received 

 4th October 1918.] 



The following simple remedy has been found successfid by the 

 author in controlling the bean fly [Agromyza phaseoli] and is recom- 

 mended as being well worth a trial. The rows should be covered 

 about four days after planting the seed with a light layer of sawdust, 

 which should then be wetted with kerosene emulsion applied with a 

 watering-can. When the plants are in the second leaf, a second dressing 

 with this emulsion should be given. It should be made with 1 lb. 

 ordinary soap dissolved in about 2 gals, of boiling water. When 

 dissolved, sufficient cold water should be added to make 4 gallons 

 and I pint of kerosene should be well stirred in. The emulsion must 

 be warm when used and must be kept well stirred. 



Illingworth (J. F.) & Jaevis (E.). Cane Grub Investigations.— 



Queensland Agric. Jl., Brisbane, x, no. 1, July 1918, pp. 45-47. 

 [Received 4th October 1918.] 



This report again calls attention to the value of cultural methods 

 as a factor in the control of sugar-cane grubs, and at the same time 

 corrects some of the statements made in the previous month's report 

 [see this Review, Ser. A, vi, p. 495]. Late planting in October appears 

 to be of considerable importance for infested areas. If cane is 

 regularly cultivated, the soil is actively worked during the flight and 



