550 



Observation has shown that the female locust deposits more than 

 one pocket of eggs during her lifetime, as many as 12, giving an aggregate 

 of 428 eggs, having been produced in one case. The devastation was 

 not as serious as it might have been, owing to the fact that many 

 crops had ripened before the locusts reached the flying stage, and also 

 owing to the intelligence system in vogue, by which it was possible to 

 warn farmers when flying swarms were travelling in their direction, 

 so that crops could be gathered at the earliest possible moment, The 

 system of cooperation among farmers, which has greatly facilitated the 

 work of destruction, is described. i\s it is now generally believed that a 

 portion of the South-west African Protectorate is a permanent breeding- 

 place for locusts, steps are being taken to review the position in that 

 territory and to devise means for dealing with it. A widespread 

 infestation is expected in the season of 1922-23, provided that climatic 

 conditions are favourable. Experiments are to be made in the use of a 

 concentrated arsenical solution without the addition of treacle, though 

 from the administrative point of view, there are certain disadvantages 

 in the use of such solutions. 



Pettey (F. W.). Codling-moth Control in Fruit Sheds.—//. Dept. 

 Agric. Union S. Africa, Pretoria, v, no. 3, September 1922, 

 pp. 245-248, 1 fig. 



Infestation by codling-moth [Cydia pomonella, L.] frequently persists 

 in orchards that are well sprayed, owing to the breeding of the moths 

 in the storage and drying sheds, whence the adults pass out into the 

 orchards again. This, however, can be almost entirely prevented if 

 measures are taken to prevent the escape of the moths from the sheds. 



A successful trap for storeroom use is described. This consists of a 

 narrow board IJin. wide by \'m. thick, nailed firmly along the top 

 of one side of a ceiling board. " Both boards are then screwed tightly 

 along each wall of the storeroom, parallel with and two feet from the 

 floor, with the narrow board against the wall, and are so attached that 

 the top edge of the narrow board is level with the top edge of the ceiling 

 board, the tongue of which has been planed away. There is thus a 

 space the thickness of the narrow board between the lower two-thirds 

 of the ceiling board and the wall of the room. Narrow strips of bagging 

 are stuffed into this space to form an attractive shelter for the larvae, 

 and tree tanglefoot is placed along the top of both boards to prevent 

 larvae from crawling over the trap, which is screwed into wooden 

 pegs driven into holes driUed in the wafl. It is essential that the 

 storeroom walls should be smooth and without cracks, preferably 

 of brick covered with cement, for at least two feet above the ground. 

 The infested fruit should be placed in a heap on straw on the floor, 

 along the walls, and no boxes, tables or trays should be left in the 

 room. AU larvae should be removed from the trap once every two and 

 a half weeks until the middle of February. After that they need not 

 be 'removed until the end of the fruit season, as they do not develop 

 into moths until the spring. Windfalls should be picked up and 

 placed in the storeroom with infested fruit. The trap described 

 can equally well be used for infested fruit piled in the open, provided 

 that it is placed on a cement floor, surrounded by a wafl suitable 

 for the trap. 



