109 



SiDENius (E.). Palmoliezeep voor Bibitbespuiting. [Palm Oil Soap 

 for Spraying [Tobacco] Seedlings.] — Deli Proefst., Medan, 

 Vlugschr. 11, November 1921, 2 pp. 



Experiments have shown that a yellow soft soap made from palm 

 oil on the East coast of Sumatra is a good substitute for ordinary 

 soft soap in sprays and has the advantage of being much cheaper. 

 Purchasers are advised to see that samples dissolve readily in boiling 

 water, that the fatty acid content does not fall below 55 per cent., 

 that the water content does not exceed 45 per cent., and that the 

 soap reacts neutrally to phenolphthalein. 



d'Axgremond (A.). Jaarverslag 1 Mei 1919 30 April 1920. [Annual 

 Report of the Vorstenland Tobacco Experiment Station from 

 1st May 1919 to 30th April \Q20.']—Meded. Proefst. Vorst. Tahak, 

 Klaten, Java, xlii, 1920, pp. 3-13. [Received 2nd January 1922.] 



In some cases tobacco was infested by Phthorimaea {Gnorimoschema) 

 heliopa, Low., just after it had been planted out. Early in the year 

 the larvae were observed in the seedlings that sometimes occur along 

 the drying sheds, and the destruction of such plants is advised. 



MoRST.\TT (H.). Zur standischen Gliedening und Ernahrungsbiologie 

 der Termiten. [On the Differentiation of the Typical Forms of 

 Termites and their Feeding Habits.] — Ent. Mitt., Berlin, xi, no. 1, 

 4th January 1922, pp. 9-16. 



The title of this paper indicates the character of its contents. 



Nuevo M^todo para combatir a los Taladros de los Durazneros. [A New 



Remedy for Aegeria exitiosa, Sav.l — Gaceta Rural, Buenos Aires, 

 XV, no. 172, November 1921, p. 453. 



Aegeria {Sanninoidea) exitiosa, Say (peach-tree borer) has been 

 for the last few years one of the worst pests of peach trees in Argentina. 

 The work of Blakeslie respecting remedies for this pest in the United 

 States is reviewed [R. A.E., A, iii, 352], and his treatment with para- 

 dichlorobenzene [R.A.E., A, viii, 189] is advocated as the most 

 successful method of dealing with it. 



Howard (A.) & Howard (G. L. C). The Agricultural Development 

 of Baluchistan. The Protection of Fruit Trees from Green-fly. — 



Agric. Res. Inst., Pnsa, Calcutta, BuU. 119. 1921, pp. 22-24. 



Irrigation experiments in the Ouetta valley here described showed 

 that fruit trees are rendered liable to attack by Aphids as a result of 

 over-irrigation during the preceding avitumn, winter and early spring, 

 which cuts off the air supply needed by the roots when new growth 

 begins in March. The Aphids do not spread from affected trees to 

 others that have not been over-watered, although they may be only 

 a few feet apart. 



In order to avoid infestation by Aphids, care should therefore be 

 taken to reduce autumn and winter irrigation to a minimum, to culti- 

 vate round the trees after the last watering in October, and again 

 deeply before the buds break in March. Where fruit trees occur in 

 flower-borders or areas under other crops, as much land as possible 

 round the trees should be protected from surface flooding by small 

 embankments. 



