407 



Lee. [op. cit., vi, 22 ; vii, 206] states that only one cotton field was 

 seriously damaged, and that on low ground and very late. Euschislns 

 impictiventris, Stal (brown cotton bug) was the most conspicuous 

 plant bug reported, but it caused only slight damage. 



Lauderdale (J. L. E.). The Cotton Aphis in the Yuma Valley in 



1918. — lOlh Ann. Rcpt. Arizona Coinmiss. Asric. & Horiic, 

 1917-18, Phoenix, 1919, pp. 73-74. [Received 21st June 1921.] 



The worst outbreak ever experienced of the cotton aphis [Aphis 

 gossypii] in the Yuma Valley occurred in Juh^ 1918. 



Spraying was immediately undertaken and was proving eftecti\'e, 

 when, after four weeks, natural enemies appeared and exterminated the 

 pest in ten days. These included H\'menopterous parasites, Syrphid 

 flies and Coccinellids. 



Bartlett (0. C). Annual Report of Assistant State Entomologist. — 



11th Ann. Rept. Arizona Commiss. Agric. & Hortic, 1918-19, 

 Phoenix, 1920, pp. 35-46, 2 figs. [Received 21st June 1921.] 



The character of the work undertaken by the Commission during the 

 year is discussed, and the various demonstrations and inspection 

 tours are described. 



Lucerne was heavily infested by cutworms in May, but they were 

 successfully destroyed by a poison bran mash consisting of 30 lb. 

 bran, 2 U.S. qts. heavy black molasses, 1 lb. Paris green, and enough 

 water to hold the mash. 



Normal crops of lucerne, melons, grain and cotton were obtained 

 by adopting in July the usual measures against grasshoppers. 



Spraying demonstrations and advice were given for the control 

 of the following pests : codling moth [Cydia pomonella], woolly apple 

 aphis [Eriosoma lanigeruui], San Jose scale [Aspidioius perniciosits], 

 grape leaf-hopper [Typhlocyba comes], and red spider and Aphids 

 on cotton. 



George (D. C). Root-knot or Nematodes. — 11th Ann. Rept. Arizona 

 Commiss. Agric. & Hortic, 1918-19, Phoenix, 1920, p. 59, 

 [Received 21st June 1921.] 



Heterodera radicicola caused serious daniage during 1919. This 

 Nematode ruined a field of cantaloups and killed many peaches, 

 apricots and almonds. It is chiefly found in loose, sandy, moist soil. 

 It feeds upon the small roots, causing them to develop small galls or 

 knots. It was observed that a rosette development of many rootlets 

 was characteristic on roots nearest the soil surface, especially those 

 of apricot and peach trees. Cotton plants were hot attacked, although 

 cowpeas in the same field had been infested. 



Lauderdale (J. L. E.). Annual Report of the Assistant Ento- 

 mologist at Yuma. — 11th Ann. Rcpt. Arizona Commiss. Agric. & 

 Hortic, 1918-19, Phoenix, 1920, pp. 63-75. [Received 21st June 

 1921.] 



The insect pests intercepted, which show a considerable decrease 

 since the preceding year, included : — Chrysomphahts aiirantii (red 

 scale), Aspidiotus hederae [oleander scale], Coccus hesperidum [soft 

 brown scale], and other Coccids, Aphids, and two cases of root-knot 

 [ Heterodera radicicola] . 



