34 



Desjardins ( — ). L'Oseille. [Sorrel.] — Rev. Agric. Afr. Nord, 

 Algiers, xix, no. 114, 7th October 1921, pp. 757-758. 



Next to spinach, sorrel is considered the most important of the 

 vegetables cultivated for its leaves and is very largely grown in Algiers. 

 It is frequently attacked by Aphis rumicis (black aphis), for which 

 10 per cent, nicotine sprays or solutions of soft soap should be used. 



Barge (J.). La Lutte centre les Ennemis des Arbres fruitiers. — 



Rev. Agric. Afr. Nord, Algiers, xix, no. 115, 14th October 1921,. 

 pp. 773-774. 



One of the most troublesome pests of gardens and orchards in 

 Algiers is Cheimatobia bnimata (winter moth), which attacks a variety 

 of trees, the young larvae infesting them in the spring when the young 

 buds are developing. To stop the ascent of the wingless females, 

 a band of liquid clay should be applied to the trunks of the trees, 

 about a yard from the ground ; above this should be tied a paper 

 band covered with a sticky substance, which should be renewed every 

 ten days. In the spring many eggs will be found below the sticky 

 band, and the larvae can be destroyed by a soft soap solution. Against 

 woolly aphis [Eriosoma lanigermn] the infested branches should be 

 washed in November with a paraffin emulsion, or sprayed with a 

 copper-sulphur spray. 



ViNCENs (F.). Rapport sommaire sur les Travaux effectues au 

 Laboratoire de Phytopathologie de I'lnstitut Seientifique de 

 rindochine du 1'' Janvier 1919 au 1^' juillet 1921.— B«//. Agric, 

 Inst. Scientif. Saigon, iii, no. 10, October 1921, pp. 307-323. 



This is an extract of the author's summarised report of his work, 

 which was not confined to fungus pests, as the injury due to insects 

 was too important to be neglected. 



These included such pests of rice as the borers, Chilo sitppressalis, 

 Wlk., and Chilo sp., biological data on which have been published 

 \^R.A.E., A, viii, 451 ; ix, 509]. Three Hymenopterous parasites of 

 the former moth have been sent for identification. Recently a case 

 was noticed in which about forty per cent, of the eggs of a species of 

 Chilo were parasitised by Ceraphron (?). Schoenobins incertellus, Wlk., 

 is more widespread in Cochin-China than Chilo, but is rarely so 

 numerous as materially to decrease the crop. While Chilo may reduce 

 it to ten per cent, of the normal, that figure represents, except in a very 

 few instances, the maximum loss from S. incertellus. Some Hymenop- 

 terous parasites of the eggs and larvae of the latter have been obtained, 

 but they seem unimportant. Gnaphalocrocis medinalis, Gn., does little 

 harm ; it seems to be checked to some considerable extent by parasitic 

 Hymenoptera, which, however, are attacked by hyperparasites. Coleop- 

 terous pests also occur, including some Coccinellid larvae {Epilachna 

 or an allied genus) ; they probably invade the rice fields when their 

 usual food becomes scarce. This also seems to be the case with a 

 small Chrysomelid, Hispa aenescens, or an allied species. A blue 

 species of Geocoryse, very common in Cochin-China, sometimes descends 

 in swarms on young rice plants, which turn yellow and die in a few 

 days. Some observations made in 1919 show that certain Dipterous 

 larvae injure the submerged portions of rice stalks ; the eggs of this 



