271 



fungus apparently of the genus Beauveria. While bacterial affections 

 produce a general liquefaction of the body cells, mycosis produces 

 a mummification that preserves in a remarkable degree the morphology 

 of the organs. 



Shinsuke Ito (G.). El Arroz. [Eice.]— 5oZ. Minisl. Agric, Buenos 

 Aires, xxiii, no. 1, January-December 1918, pp. 3-123, 47 figs. 

 [Received 30th April 1919.] 



Locusts are not as a rule injurious to rice cultivation in Argentina, 

 their invasions generally occurring either at the time of sowing or 

 of gathering the crop. Occasionally, however, an invasion occurs 

 during the period of growth ; in this case, the rice-fields are flooded 

 in order to check the attack A bug, Nepa cinerea, is said to cut 

 through the base of the young rice-plant. The measures adopted 

 against this pest is the drying of the rice-fields. Gryllotalpa gryllo- 

 talpa (vulgaris) constructs galleries about the rice-fields ; Thrips 

 oryzae and T. oryzophaga in their larval stages cause more or less 

 serious damage to the plants. 



Stored rice is liable to attack by a moth and a weevil [Calandra 

 oryzae ? ]. The best preventives of such attack are cleanliness, thorough 

 ventilation of the storehouses and the isolation of infested rice. Before 

 use, the storehouse should be thoroughly disinfected with a 20 per 

 cent. " acaroina " solution or a 5 per cent, to 10 per cent, formalin 

 solution ; this treatment should be given twice wuth a few days' 

 interval. Before storage, the grain should be fumigated with carbon 

 bisulphide at the rate of about 5^- oz. per 35 cub. ft., the process 

 lasting from 24 to 48 hours. Bags should not be piled one above 

 the other but should be placed separately for thorough ventilation. 



MuELLo (A. C). Instrucciones prdcticas sobre el Cultivo del Algodonero. 



[Practical Instructions on the Growing of Cotton.] — Bol. Minist. 

 Agric, Buenos Aires, xxiii, no. 1, January-December 1918, pp. 

 148-155. [Received 30th April 1919.] 



In the cotton-growing district of Argentina known as the Chaco, 

 besides the usual depredations of locusts and ants, the cotton fields 

 are infested every year by Alabama (Aletia) argillacea. This moth 

 pupates in the curled leaves, this stage lasting from a week to a month, 

 and there may be as many as seven generations in a season. The 

 caterpillars generally appear when the plants begin to flower and 

 form squares, but occasionally they infest and destroy quite young 

 plants. They mainly occur in February and March, continuing 

 sometimes as late as October. Warm, humid weather encourages 

 the development of this pest. The only measure against the adults 

 is the use of light-traps. For the larvae, white arsenic or Paris green 

 are used, generally the latter, either in the proportion of 2 to 5 lb. 

 in 100 gals, water, with a little carpenters' glue or molasses to act as 

 an adhesive, or in powder form, using 1 to 2 lb. per acre, applied while 

 the dew is on the plants. Another pest is an unidentified caterpillar 

 that cuts through the young plants at the root. Cabbage leaves are 

 suggested as a trap for these. 



