366 



Jensen (H.). Lasioderma en Tabaksmot. [Lasiodenna serricorne 

 and the Tobacco Mot\i.]^Meded. Procfst. Vorst. Tabak, Klaten, 

 XXX, 1917, 29 pp. [Received 17th May 1921.] 



This bulletin describes trials with various insecticides against 

 Lasioderma serricorne and the tobacco moth [Setomorpha marga- 

 laestriata] . 



The quantity of carbon bisulphide (270 c.c. per cu. metre) advised 

 [R. A.E.. A, vii, 29] for use in the Dutch East Indies was found to be 

 excessive. In the Vorstenland fumigation rooms 100-150 c.c. sufficed ; 

 less than 100 c.c. should not be used. The combustibility of tobacco 

 is not affected by the carbon bisulphide. Benzine is satisfactory if 

 enough is used to saturate the air and it is allowed to act for 5-6 days. 

 L. serricorne is unaffected by the fumes of formalin or those of burning 

 sulphur. Tobacco store-rooms may be protected against both pests by 

 screening the doors and windows with cotton fabric, or each bale or pile 

 of bales may be wrapped in the material. L. serricorne can penetrate 

 the matting used to cover the bales. When inspecting store-rooms, it 

 is necessary to be on the watch for rice, cacao sweepings, etc., as well 

 as for tobacco debris. 



Ramirez (R.). Plagas de la Agricultura en el Distrito Federal. — 



Rev. Agric, San Jacinto, D.F., v, no. 9, January 1921, pp. 

 662-663. 



Insect pests recorded from the Federal District of Mexico include 

 termites and certain Orthoptera which are injurious to Gramineae, 

 lucerne, etc. Winged locusts occasionally appear, but do not 

 constitute a serious danger. 



Rhynchota include many Aphids and Coccids, and among Lepidop- 

 tera are Pieris rapae on cabbage ; Clisiocampa azteca, the larvae of 

 which weave large nests in the branches of willow ; Heliothis obsoleta 

 (armigera) on maize ; Laphygma frugiperda on lucerne and other 

 plants; and Sitotroga [Gelechia] cerealella in ears of maize. 



Diptera include Tipula simplex, the larvae of which feed on the roots 

 of lucerne, barley and oats, while Drosophila larvae devour ripe fruit. 

 Coleoptera include Lioderma yucateca on American agaves ; Tene- 

 broides corticalis, Silvanus surinamensis and Laeniophloens pnsillus 

 in stored grain ; Epilachna corrupta on beans ; Thaptor oblongus, 

 injurious to dry wood ; and Amphicerns punctipennis, destructive to 

 maize. Euphoria basalts is found on the flowers of pumpkin, but 

 does not seem to cause injury. Many Tamellicorns in the larval 

 stage attack the roots of various plants ; Ligyrus rugicepsiniests maize 

 stalks ; Macrodactylits subspinosus is a serious pest of maize and other 

 plants ; Aphagiognathus hybostoma mines the trunks of willows ; 

 Acantlioderes funerarius is frequently fovmd in American agaves, but 

 is not known to cause damage ; Leptinofarsa mnltitaeniata is a serious 

 pest of potatoes ; Bruchiis spp. attack leguminous seeds and dry 

 cotton fibres ; and Tenebrio molitor is a pest in mills and bakeries. Other 

 Coleopterous pests are Epitragus metallicus on peaches and rose 

 trees ; Echocerus cornutus, Tribolium confusum and T. castanenm 

 {ferrugineurn) in maize ; Apion calcaratipes in beans ; Nicentrus 

 testaceipes in maize ; Heilipus laiiri infesting avocado pear ; Calandra 

 granaria and C. (Siiophilns) oryzae in stored grain ; Sphcnophorus 

 spinolae in the decayed shoots of Nopalea coccinellifera (cochineal 



