524 



Peterson (A.). Eggs of Apple Aphides, — Kept. New Jersey Agric. 



Expt. Sta., 1917-18, Neic Bnnisicick, N.J., 1919, pp. 231-234. 



[Received 6th September 1921.] 



The bulk of the information given in these studies of the morphology 



of eggs of SiphonapJiis padi, F. [Aphis avenue, F.), A. pomi, De G., and 



A. sorbi, Kalt., together with the various sprays tested, have already 



been noticed [R. A.E., A, vi, 110 ; viii, 30, 458]. 



Peterson (A.). Peach Tree Borer. — Rept. New Jersey Agric. Expt. 

 Sta., 1917-18, New Brunswick, N.J., 1919, pp. 234-243, 2 tables. 

 [Received 6th September 1921.] 



The habits of the adult peach-tree borer, Aegeria [Sanninoidea) 

 exitiosa, Saj^ and the spraying experiments carried out in 1917 have 

 already been noticed [R. A.E., A, vin, 45]. In addition tarred paper 

 collars were extensively used. In borings after this treatment large 

 numbers of larvae of varying sizes were removed. In the autumn, 

 larvae hatched from eggs deposited in the same summer are too small 

 to be readily seen. This is also true in the spring of the next year. 

 In the early part of the year the full-grown larvae that are found 

 have come from eggs deposited late in the summer two years previously. 

 The prolonged development of some of the larvae and the difficulty 

 of removing them all by boring makes it impossible to determine 

 definitely the value of these protectors in one year. 



The protectors and their application to the trees are described, 

 with the results of various experiments. From these, 76-90 per cent, 

 of the larvae per tree were reduced in all cases. Many of the larvae 

 were almost full-grown, and were undoubtedly present when the 

 protectors were applied. 



Sprays of nicotine resinate, scalecide and other insecticides were 

 applied at intervals of ten days to two weeks. In ah cases the trees 

 were uninjured, but the number of larvae was not materially reduced. 



Headlee (T. J.). Report oJ the Department of Entomology, 



191S-19.— Rept. New Jersey Agric. Expt. Sta., 1918-19, New 

 Brunsivick, N.J., 1920,^^ pp. '375-459, 13 tables, 1 plate, 5 figs. 

 [Received 6th September 1921.] 



A spray for the apple aphis [Aphis pomi] that was found efficient, 

 though it did not effect complete control, consisted of 1 part 40 per cent, 

 nicotine to 500 of winter strength commercial lime-sulphur, the latter 

 consisting of 1 gal. standard hquid lime-sulphur concentrate to 9 gals, 

 water. The spray was apphed after the buds became silvery and before 

 the small leaves projected. The failure to effect control was partly due 

 to the fact that the lower surfaces of the leaves were not covered 

 with the spray. Other Aphids were abundant on melon, cabbage, 

 cauliflower and spinach, and Macrosiphum solanifolii, Ashm., caused 

 considerable damage to potatoes. Against them spraying with 

 1 part 40 per cent, nicotine to 500 of water is advised, 2 lb. soap being 

 added to each 50 U.S. gals, of water when soft, and 4 to 5 lb. when hard. 

 Pressure is most important, as the Aphids have to be killed by contact. 



The codling moth {Cydia pomonella) has largely increased during 

 recent years. The fruit should be sprayed from above and below and 

 kept coated, especially in the first week in July, to prevent the larvae of 

 the first brood from entering the sides of the apple. In 1918 the second 

 brood appeared on the late fruit, which should be kept coated during 

 this period, the exact limits of which are under investigation. A brood 



