408 



The Coccinellids that checked the serious outbreak of the cotton 

 aphis [Aphis gossypii] which occurred in July 1918 [see preceding 

 page] were : — Hip'podamia convergens, Coccinella novemnotata, Adalia 

 bipunctata, Megilla maciilata and Chilocorus bivulnerus. 



The damage caused by Hdiothis ohsoleta, F. (cotton bollworm) 

 was more severe. Most of the injury occurred in the square and bloom 

 stage, and experiments will be carried out in spraying with lead 

 arsenate powder at this stage. A new species of thrips was very 

 abundant on young cotton in May. 



Mvochrous longulus, Lee, was more general, and one month earlier 

 than in the previous season. In one instance, in a heavily infested 

 field of heavy soil, the beetle was successfully destroyed by flooding.. 



Bucciilatrix thurberiella, Busck (cotton leaf-perforator) and 

 Estigmene acraea (salt-marsh caterpillar) were less abundant than 

 usual. 



Elasmo palpus lignoscllus, Zell. (lesser corn-stalk borer) was noted on 

 beans. The larvae tunnel the stalks at or just below the surface of 

 the ground, causing the plant to wilt. The destruction of all plants 

 showing signs of attack and rotation of crops are advised against 

 this moth. 



Against Diabrotica vittata, F. (striped cucumber beetle), on squash,, 

 melons and beans, satisfactory results were obtained by spraying 

 with 2 lb. lead arsenate powder to 50 U.S. gals, water. 



Among pests of fruits and vines the grape leaf-hopper [Typhlocyba 

 comes] was reported to be prevalent, but satisfactory results were 

 obtained by spraying with Black-leaf 40 and whale-oil soap. 



Inspection of Plant, Fruit and Seed Importations. — 11th Ann. Rep I. 

 Arizona Commiss. Agric. & Hortic, 191S-19, Phoenix, 1920, 

 pp. 76-78, 4 tables. [Received 21st June 1921.] 



The following pests were intercepted by various inspectors in 

 Arizona: — Aleurodes spiraeoides, Hcterodera radicicola, Aspidiotits 

 perniciosus (San Jose scale), Saissetia oleae (black scale), Pseudococciis 

 citri, Chrysomphalus aurantii (red scale), Aspidiotits hederae (ivy scale) 

 and Coccus hesperidum (soft brown scale) . 



Bruttini ( — ). On the Mixture consisting oJ Lime-sulphur or Poly- 

 sulphides of Calcium as Insecticide or Fungicide. — Rome, Im- 

 primerie polyglotte I'Universelle, 1920, 36 pp., 6 ligs. (Abstract 

 in Internat. Rev. Sci. S- Pract. Agric, Rome, xi, no. 4, April 

 1920, pp. 525-527.) [Received 22nd June 1921.] 

 Instead of making lime-sulphur mixture with definite proportions, 

 of lime and sulphur treated with boiling water, the author has patented 

 a process by means of which polysulphides of calcium are ob- 

 tained in a super-concentrated mixture at 35°-40° Be. from sulphur 

 produced by purifying gas for illumination in a special manner,, 

 instead of from commercial sulphur. This preparation is being made 

 at a gas works and is being sold as " Supersolfo." 



One of the most important characteristics of this substance is that 

 it exhibits great resistance to the action of the air, with the result 

 that there is no continuous formation of insoluble crystals of calcium 

 sulphite, as is the case with the mixture made from commercial sulphur: 

 there is, further, a fair content of iron in the soluble state, not combined 

 with cyanogen. This is important in view of the fact that the action 

 of polysulphides on plants is, in this case, increased by that of the iron. 



