532 



Work connected with Insect and Fungus Pests and their Control.— 



Rejpt. Agric. Dept. Dominica 1918-19, Barbados, 30th August 1919, 

 .. pp. 13-15. 



A Longicorn, Leptosfylus praemarsus (lime-tree bark-borer), has 

 been found in freshly killed lime trees in Dominica. This beetle 

 apparently completes its life-cycle in dead wood, and although it has 

 little influence on healthy tissue, it hastens the death of diseased trees. 

 Clean cultivation is the most important remedial measure. Dead 

 patches should be cleaned and smeared with tar. 



Attention is called to the fact that though Aleurocantkus ivoglumi 

 (black fly of citrus) is not present on the island, it may be introduced 

 at any time in spite of the precautions taken to prevent this. 



Vayssiere (P,). La Lutte centre le Criquet p61erin en Afrique. — 



Jl. d^ Agric. Trap., Paris, xix, no. 161, 30th September 1919. pp. 

 305-307, 



Much of the information contained in this paper on locusts has 

 already been noticed [see this Review, Ser., A, vii, p. 432]. 



Vayssiere (P.). L'Etude des Ennemis des Plantes aux Colonies. — 



JL d' Agric. Trop., Paris, xix. no. 161, 30th September 1919, pp. 

 320-321. 



Attention is drawn to the necessity of forming some organisation 

 throughout the French colonies to deal with the insect and fungus 

 pests affecting economic plants. Similar organisations existing in 

 other countries are quoted as examples. 



Bazile (G.). Nouveaux Precedes de Destruction des Acridiens. — 



C. R. Hebdoni. Acad. Sci., Paris, clxix, no. 12, 22nd September 

 1919, pp. 547-549. 



The campaign against locusts in question has been previously 

 noticed [see this Review, Ser, A, vii, p. 432]. Similar experiments were 

 carried out in Algeria, where the value of flame-throwers as a means of 

 destroying Schistocerca fatarica was confirmed. Spraying with 25 lb. 

 heavy coal- oil to 5 lb. of black soap and 47 gals, of water is recommended 

 where the burning of trees is not advisable. Carbon oxychloride and 

 tin chloride were tested but did not prove successful. 



Froggatt (W. W.). The Native Lime Tree Borer {Citriphaga 

 mixta, Lea). — Agric. Gaz. N. S. W., Sydney, xxx, no. 4, 2nd April 

 1919, pp. 261-267, 4 figs. [Received 20th October 1919.] 



During 1918 a Longicorn beetle was found attacking "native 

 lime " trees {Atlantia glauca) in New South Wales. A new genus, 

 Citriphaga, has been erected for its reception by Lea, whose description 

 of the species is appended. 



The eggs of C mixta are laid in the bark a few inches above the 

 ground. The larvae bore up the stem for about 4 or 5 feet, causing 

 gumming of the damaged wood. Several larvae may work side by 

 side, thus riddling the w^hole stem. The duration of the larval stage 

 is about 10 months and that of the pupa from 4 to 6 weeks. It is not 

 unlikelv that C. mixta mav attack cultivated Citrus trees. 



