451 



A solution that has proved efficacious against C. dictyospermi 

 pinnulifera is composed of 40 parts by weight of seal-oil, 20 of fish-oil, 

 5 of caustic soda, 30 of tar-oil and 19 of water. Good results have also 

 been obtained with hydiocyanic acid gas. A measure that has 

 proved successful in S]>ain and Algeria comprises a winter spray 

 consisting of 50 lb. lime, 33 lb. sulphur, 25 lb. conunon salt, and 100 

 gals., water, followed by spring treatment with a mixture containing 

 50 lb. lime, 33 lb. sulphur and 150 gals, of water. 



Lala^de (E.). Le Charancon Coupe-Bourgeons des jeunes Grefies. — 

 Rev. Agric. de VAfrique du Noid, Algiers, xviii, no. 54, 13th 

 August 1920, pp. 131-132. 



Attention is called to the occurrence of a small bud-cutting beetle, 

 ])robably a species of Opatrum, amongst newly grafted vine shoots. 



As a means of protecting the plants it is suggested that they should 

 be cut sufficiently high uj) so that the buds are beyond the reach of 

 this pest, which generally works at the ground surface. 



ViNCENs(F.). Microlepidotteri nocivi al Riso nella Cocincina. [Micro- 

 lepidoptera injurious to Rice in Cochin-China.] — Bull. Agric. 

 Inst. Scient., Saigon, ii, 1920, pp. 97-105, 2 plates. (Abstract 

 in L' Agric. Colon., Florence, xiv, no. 7, July 1920, p. 314.) 



Among the insect pests of growing rice are the caterpillars of ScJweno- 

 bius incertellus, Wlk., and Chilo suppressalis, Wlk., which bore inside 

 the stems, and those of Cnapholocrocis medinalis, Gn., which feed on 

 the leaves. The last-named moth is the most abundant, but does little 

 injury, so that combative measures are not needed ; it has many 

 natural enemies and many individuals are destroyed by the fires lit 

 against S. incertellus. The latter does damage throughout the rice 

 field, while C. suppressalis is concentrated in circular patches that 

 gradually spread. The former hibernates in the rice stubble and the 

 latter lives on the wild plants that grow in the field after the harvest. 



To reduce the losses these moths cause, it is necessary to cut and burn 

 the wild plants in and around the rice-fields before sowing or trans- 

 planting. When the rice is growing, large fires should be lighted on 

 dark nights as soon as the adults of S. incertellus are noticed. When 

 large yellow patches are seen in the fields the affected rice-plants 

 must be pulled up and burned. After the harvest the straw left in 

 the fields must be burned and the ground must be lightly ploughed, so 

 as to expose those parts of the stalks that have escaped the fire. 



Crespo (M. a.). Un Insetto molto dannoso al Cocco in Portorico. 



[An Insect very injurious to the Coconut in Porto Rico. J — Rev. 

 Agric. Puerto Rico, San Juan, iv, 1920, pp. 47-48. (Abstract in 

 U Agric. Colon., Florence, xiv, no. 7, July 1920, pp. 314-315.) 



In the island of Porto Rico young coconuts are seriously injured by a 

 stem-boring beetle, Strategus quadrifoveatus, which is also a pest of 

 sugar-cane. Infestation results in a yellowing of the leaves foUt)wed by 

 the arrest of growth and the ultimate death of the palm. Trap-heaps 

 collect large numbers of the larvae, and if a j^lant is thought to be 

 infested the ground around it must be dug up and all individuals 

 found destroyed. Clean cultivation to eliminate all possible breeding^ 

 places is also recommended. 



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