246 



to take the dew and no other food or water over a period of several 

 •days. Such a condition, however, does not occur in cotton fields. 

 When boll-weevils had access to food in the form of non-poisoned 

 ■cotton squares and, at the same time, to dew from treated plants, no 

 mortality resulted, showing that the weevil can be poisoned under 

 normal conditions only by poisoning its food. Consequently it would 

 seem that as the boll-weevil is poisoned largely or entirely through 

 taking poison with its food, machinery for applying poison to the 

 cotton plants should be so designed as to apply the poison primarily 

 to the squares, bolls and terminal buds, rather than to the foliage. 



The greatest mortahty among the boll-weevils occurred on the third 

 ■day following application of the arsenates and fell off rapidly after the 

 seventh day, indicating that, other things being equal, applications 

 should he at intervals of a week, or less, apart. 



Kelly (E. G.). Outline of Project Work in Extension Entomology.^ 

 Jl. Econ. Entoni., Concord, N.H., xiii, no. 1, February 1920, 

 pp. 137-140. [Received 13th April 1920.] 



Extension work in entomology means the carrying to the producer 

 'of information as to the control of his insect pests. The organisation 

 of this work in Kansas is described. County agents, under the 

 direction of the Extension Entomologist, exist at each County Farm 

 Bureau. The Entomologist sees the agents at conferences, and they 

 hand on his recommendations to the farmers at "insect committees." 

 This programme is elastic, and can be intensified in emergency, while 

 the Entomologist may devote two or three days to helping the agent 

 in a particular area. 



The agent's campaign is helped by publicity methods, and at the 

 .same time there is an educational side to the work, short lessons 

 being sent to every farmer in the county to follow up the campaign. 

 There are extension schools for farm workers when opportunity offers, 

 and advantage is taken of local opportunities such as the county fairs 

 ior reaching as many people as possible. 



Harned (R. W.) & Snapp (0. I.). Two " Spray your Orchard Week " 

 Campaigns in Mississipi. — Jl. Econ. Entom.. Concord, N.H., xiii, 

 no. 1, February 1920, pp. 140-142. [Received 13th April 1920.] 



In 1917 from 85 to 90 per cent, of all deciduous fruit trees in 

 Mississippi were more or less infested with San Jose scale {Aspidiotus 

 perniciosus). A campaign was organised during the summer of 1917, 

 to be carried out in December, for the purpose of urging upon every 

 farmer possessing an orchard to spray it for this pest. Prizes were 

 given for the best outfits for spraying suited to various orchards. 

 Publicity work was undertaken, and, under the direction of the 

 county agent, the aid of every possible local authority and association 

 was called in. The campaign acliieved very good results. Infestation 

 by this scale materially decreased, and the use of insecticides was 

 realised as a practical factor in the State. A further campaign on 

 the same lines took place in February 1919, in which Louisiana 

 joined. 



