13 



In the discussion following this paper it was stated that in Colorado 

 spring cultivation cannot be considered to have any remedial effect ; 

 although a better crop of lucerne is produced owing to stimulation 

 of the growth early in the season, the number of weevils and larvae 

 present equal those found on control plots. Sprays directed against 

 the overwintering adults are of little value, later ones being more 

 effective. 



Marlatt (C. L.). The Pink Bollworm.— M//«i^. Bull Ccd. State 

 Dept. Agric,., Sacramento, viii, no. 8, August 1919, pp. 478-485. 

 • [Received r2th November 1919.] 



Although the pink bollworm [Pecfinopkora gossi/piella] was originally 

 introduced into America from Egypt, Mexico is apparently the chief 

 source of danger of infestation in Texas. The general situation in 

 this State and the drastic measures taken there are reviewed 

 [R.A.E., A, vi, 544]. The infested area was examined in 1918, but 

 not a single pink bollworm was found. Owing to the success of this 

 extermination work, permission has been granted to grow cotton under 

 Ucence for the 1920 crop in the districts where it had previously been 

 prohibited. 



Maskew (F.). Report for the Month of July, 1919.^Mthly. Bull 

 Cal State Dept. Agric, Sacramento., viii, no. 8, August 1919, 

 pp. 495-496. [Received 12th November 1919.] 



The insect pests intercepted during July included : from Central 

 America, Pseudococcus sp., Aspidiotus sp. and A. cyanopkylli on 

 bananas ; Briickus obtectus in beans : from Mexico, Coleopterous and 

 Lepidopterous larvae in guamuchil seeds ; Lepidosajdies beckii^ on 

 limes : from Arizona, Heliothis {Chloridea) obsoleta in green maize : 

 from Iowa, Pseudococcus sp.. Coccus hesperidum and Hemichionaspis 

 aspidistrae on Boston fern : from Peru, larvae of an undetermined 

 weevil in potatoes : from Hawaii, Diaspis bromeUae and Pseudococcus 

 bromeliae on pineapples ; an undetermined weevil in seed pods and 

 larvae of Dacus (Bactrocera) cucurbitae in cucumbers : from Tahiti, 

 Lepidosaphes beckii on oranges ; Pseudococcus sp. on croton plants : 

 from Japan, Lepidopterous larvae in peanuts and beans. 



RoAEK (R. C.) & Keenan (G. L.). The Adulteration of Insect Powder 

 with Powdered Daisy Flowers {Chrysanthemum leucanthemum,, 

 L.)._[7.>S. Dept. Agric. Washington, D.C., Bull. 795, 28th July 

 1919, 12 pp, 2 plates, 1 fig. [Received 13th November 1919.] 



Insect powder is frequently adulterated with a great variety of 

 substances. Flowers of other plants of the family Compositae naturally 

 suggest themselves for this purpose, particularly Chrysanthemum 

 leucanthemum (ox-eye daisy) and other species of this genus that 

 resemHe C. cinerariacfoUum. Chemical analysis is insufficient 

 to show adulteration of insect powder with daisy flowers, but this 

 can be definitely determined by microscopic examination. Powdered 

 daisy flowers are distinguishable by the irregular, dark red fragments 

 of the achene, and the pahsade-hke cells comprising the costal tissue 

 of the achene. 



