256 



G. viridis. Trap-belts containing no insects are not touched by the 

 birds, while those torn by them always contain remnants of destroyed 

 cocoons. 



The second part deals with the number of caterpillars of Cydia 

 pomonella found in individual fruits. Of 500 apples examined, 449 

 or 89 '8 per cent, contained only one and 51 or 10-2 per cent, contained 

 more than one caterpillar. Details are given of the numbers of 

 caterpillars in the latter category, and it is concluded that in not 

 more than 10 per cent, of cases do the females deposit more than one 

 egg on one apple. 



K"b 6opb6'b CTj capaHMBM. [The Campaign against Locusts.] — 

 « SeMneflt/lbMeCKan ra3eTa.» [Agricultural Gazette], Petrograd, 

 no. 7 (175), 3 March 1917, p. 165. 



The Council of the Governor-General of Turkestan has assigned 

 about £100,000 for the campaign against locusts in 1917. Egg-clusters 

 have been found on an area of 270,000 acres and it is proposed to 

 utilise the services of soldiers and prisoners of war to conduct the 

 operations. 



Pettey (F. W.). The Codlin-moth and its Control in the Western 



Province. — Union of S. Africa, Dept. Agric, Pretoria, Sc\.B\i\\. 

 no. 9, 48 pp., 7 figs., 11 tables. 



In connection with work on the control of codlmg moth [Cydia 

 pomotiella] in South Africa, the life-history of which is described, it 

 has been found that even in orchards near sources of infestation three 

 or four sprays are effective in controlling this pest in pears, if the appli- 

 cations are made thoroughly and at the right time. When pears are 

 to be picked at or before the middle of February, the first spray should 

 be applied soon after the petals drop and the second just before the 

 eggs of the second generation hatch. When three sprays are applied, 

 as is advisable, the first should be used just after the blossoms drop, 

 the second, ten days to two weeks later, and the third about the 20th 

 December, just before the second generation larvae begin to hatch. 

 An additional late spray applied about the first of February is recom- 

 mended for fruits ripening near or after the middle of February. In 

 orchards that for some reason have not been ade<]uately sprayed the use 

 of bands may be effective, especially from the middle of November to 

 the middle of January. These bands should be examined at, at least, 

 seventeen day intervals and the larvae removed and destroyed. They 

 have been found to be of no use where Argentine ants [Iridomyrmex 

 humilis] are present in numbers. 



The parasitic enemies of the codling moth in the Western Province 

 include the Chalcid, Trichogrammoidea luiea, which is indigenous to 

 South Africa. It also attacks the so-called Natal codling moth, 

 Argyroploce {Enarmonia) batrachopa, a native species injurious to 

 oranges. Four other species of Hymenoptera were bred from codling 

 moth larvae during the season, including the Ichneumonid, Pimple 

 heliophila. Under natural conditions these parasites have not been 

 found to act as complete controls. 



The tables given show the results of experimental spraying in detail. 



