316 



Faks (H.I. Psyche c^yaminclla, a Macrolepidopteron occasionally 

 injurious to Vines in Switzerland. — La Tcrrc Wuidoise, Lausanne, 

 xi. no. 49. 6tli DccenilnT 1919, pp. 435-437. (Abstract in Mthly. 

 Bull. Agne. Intell. & PL Dis., Rome, xi, no. 2, February 1920, 

 p. 277.) [Received 26th April 1921.] 



Psyche unicolor (i^i'dniiiiellti), wliicli gencralty feeds on grass culms, 

 occasionally attacks the young leaves of grape-vines in Switzerland 

 when its normal food - plant fails. When this occurs, the cases 

 containing the caterpillars should be collected, and 1 lb. of copper 

 aceto-arsenite should be added to each 25 gals, of Bordeaux mixture 

 used on the \'ines. 



Entomologie. --/>'////. Soc. Xat. Accliniat. Prance, Paris, Ixviii, no. 4, 

 April 1921, p. 56. 



A vScolytid making numerous galleries in firs in the Seine-et-Oise 

 region has been identified as Polygraphus poligraphiis ; this is the 

 only H3/lesine beetle that adapts itself to fir and also attacks pine, 

 Norwegian pine, and even larch. Remedial measures are difficult ; 

 trap trees during the whole growing period are recommended, and all 

 dead or deca3ang bark should be removed in the spring. 



Stored- (G.). The Present Situation with regard to the Control of 

 the Pink Boll Worm in Egy]^t— Egypt : Minist. Agric, Pecli. & 

 Sci. Service, Cairo, Bull. 16, 1921, 16 pp. 



The results obtained in Egypt in the control of the pink bollworm, 

 Platyedra {Gelechia) gossypiella, Saund., by following the reconunenda- 

 tions of the entomologist entrusted with the work and the regulations 

 of the Ministry of A,griculture, are discussed. The removal and 

 burning of all green or dead bolls left on the plants after picking 

 has never been given a fair trial, as much opposition has been raised 

 against this practice, and there is a great tendency among natives 

 to knock the dead bolls on to the ground instead of picking, which 

 renders this method worse than useless. Earliness in ripening the 

 crop and dealing with the old cotton plants after picking has long 

 been recognised as of primary importance in bollworm control. 

 Earl}^ ripening means a lighter attack at the time of picking, and 

 early pulling up means a lighter attack in the following season. It is 

 fairly certain that the short-C3'cle moths, if they can find no plants 

 on which to oviposit, die without leaving any progeny. It is the 

 long-cycle larvae, which hibernate through the winter and produce 

 moths in the following cotton season, that carry on the infestation 

 from one year to another. There is a gradual tendency, as the season 

 progresses, to assume the long-cycle habit, and there is also a rapid 

 increase in long-cycle individuals at the end of the season. Thus, 

 the earlier the cotton sticks are pulled up the fewer hibernating boll- 

 worms will be left, and the difference of a few days appreciably reduces 

 the numbers in the following \^ear. 



There has been a remarkable decrease in the severity of pink l)oll- 

 worm attack during the past few years. This is considered to be 

 due in part to the bollworm campaigns, but also to other factors, 

 such as parasites, weather and changes in agricultural practice. It 

 has been shown that by reducing the watering after the middle of 

 July, the bolls can be made to rii)en very early. This i:)ractice also 

 gives the parasites a longer period in which to attack the boUworms. 



