447 



They were found in large numbers on flax stalks left behind in pulled 

 fields. They were also seen on grasses, clover and weeds, but it is 

 not known whether they feed on them. They become less active early 

 in October, and seek places for hibernation. The hibernating beetles 

 were found in sheltered places near flax fields of the previous season, 

 below the grass growing on an unploughed flax field, and also in a field 

 sown with grass after flax. It is evident that the beetles which emerge 

 in August and September after the winter resting period cause the 

 most damage. It is not yet known if there is more than one generation 

 a year. 



The remedial measures recommended are the application of | cwt. 

 nitrate of soda per acre for young plants. The sowing time and 

 preparation of the seed-bed need careful consideration. Fields should 

 be thoroughly cultivated and rolled after the flax has been pulled, 

 to destroy the larvae and pupae. In the case of fields laid down to 

 grass, soil insecticides may be effective, and experiments are being 

 started on these lines. 



Calocoris hipunctatus, F. (Capsid plant bug) sucks the juice of flax, 

 and also damages potatoes, beans and peas. When the growing 

 point is attacked the plant becomes branched. Large swellings occur 

 where the epidermis is punctured, and render the plants liable to 

 attack by a fungus {Botrytis). The female lays eggs in the stems and 

 leaves of the plants, and the larvae feed throughout the summer, the 

 winged adults appearing towards the end of July. 



The remedial measure recommended is the ploughing of fields not 

 sown to grass immediately after pulling. These bugs have been 

 controlled on fruit trees by spraying with a wash containing nicotine 

 and soap. Experiments of this nature will be carried out on flax. 



Pagliano (T.). n Pidocchio nero degli Agrumi in Tunisia. [The 



Black Scale of Citrus in Tunisia.] — Bull. Soc. d' Hortic. Tunisie^ 



Tunis, xix, 1921, pp. 55-59. (Abstract in L' Agric. Colon., 

 Florence, xv, no. 7, July 1921, pp. 386-387.) 



The black scale of Citrus, Parlatoria zizyphi, is a well-known pest in 

 Tunisia, where several generations occur in a year. Remedial measures 

 may be apphed from April to November, and include the following 

 effective sprays : Black soap 5 lb., petroleum 2 gals., copper sulphate 

 51b., water 50 gals.; and titrated nicotine extract 1 gal., sodium 

 carbonate 21b., black soap 101b., methylated spirit 1 gal., water 

 100 gals. 



Vattier (J.). La S6riciculture et la Culture du Murier a Fez, — Rev. 

 Agric. Afr. Nord, Algiers, xix, no. 102, 15th July 1921, pp. 546- 

 553, 4 figs. 



This article deals with silkworm breeding and mulberry cultivation 

 in Morocco, especially around Fez. 



Jablonowski (J). Lucernalev61tedu ozone s a borso veszedelme. 



[An Aphid infesting Lucerne and liable to attack Peas.l — Koztelek. 

 Budapest, xxxi, no. 20, 14th May 1921, pp. 441-442." 



In April and May, Macrosiphiim pisi, Kalt. (common pea aphis), 

 caused considerable damage to lucerne crops in Hungary. During 

 these months the weather was very hot and dry, but very cold at night, 

 the thermometer dropping 8-9° C. below zero [19-17° F.], and so the 



