388 



Grethkr ( — ). Verfahren zur Bekarapfung der Reblauskrankheit 

 unter Erhaltung des Weinstockes (Praventivverfahren). [A pre- 

 ventive Method for combating Phvlloxera.] — Wein u. Rebe, ii, 

 no. 7, 1920, pp. 328-337. (Abstract"^ in Wiener Landw. Ztg., 1921, 

 no. 32-33.) 



The author recommends the use of a cake containing carbon 

 bisulphide and compounds of carbon chloride and potassium cyanide. 

 This preparation is placed in the ground, and the fumes are said to 

 destroy PhyUoxera, though the tender roots are temporarily more 

 or less injured also, according to their distance from the chemical. 

 This substance should be used for stocks suspected of being infested ; 

 those known to be so must be destroyed. 



Service and Regulatory Announcements. August December 1920. — 



U.S. Dcpt. Agric, Washington, D.C., Fed. Hortic. Bd., no. 69, 

 19th March 1921, pp. 113-150. [Received 10th June 1921.] 



As a result of the continued inspections throughout 1920 in the 

 regulated areas of Louisiana, only one of these was found to be infested 

 with pink bollworm [Platyedra gossypiella]. This infestation is 

 undoubtedly traceable to the seed received at local oil mills in the 

 preceding year. The invaded fields are within a three-mile radius of 

 these mills. Extensive clearing-up work was immediately instituted, 

 and a non-cotton zone extending from H to 2 miles beyond the furthest 

 known infestations has been announced in addition to the present 

 regulated zone round that point. The area will include 6,000 acres 

 of cotton land and will cost the State upward of ;{1 5,000 in compensation 

 to planters in 1921. The unfavourable climatic conditions of 1919 

 and 1920 together with previous control work have probably eradi- 

 cated the pest over considerable areas of the Trinity Bay district, 

 and given adequate Federal and State support, as well as thorough 

 co-operation of the planters, there is every opportunity of complete 

 extermination. There is urgent need for strengthening the Texas 

 Pink Bollworm Act of 1920, and determination of the scope of Federal 

 work for 1921 is not possible until the policy and support of the State 

 officials and the State Legislature have been indicated. 



Precautions are being taken with reference to the possibilit}^ of carry- 

 ing infestation in cars, and the regulations relative to marking, 

 inspection, cleaning and disinfection of such cars are quoted. For the 

 fumigation of cars 2 oz. of sodium cyanide guaranteed to contain not 

 less than 51 per cent, cyanogen, 3 oz. of sulphuric acid 66° Be. or 

 approximately 1 -84 specific gravity, and 4 oz. of water are to be used 

 for every 100 cu. ft. of space. 



An appropriation of about £3,000, of which one-third is to be 

 immediately available, has been asked for to complete the extermina- 

 tion of the date scale, Parlatoria hlanchardi. 



The regulations concerning the importation of fruits and vegetables 

 from Cuba, the Bahamas, Jamaica, etc., owing to the prevalence in 

 those countries of Aletirocanthus woglumi, Ashby (citrus black fly) 

 have already been noticed [R.A.E., A, ix, 357]. 



A list is given of the current quarantine and restrictive orders. 



