- 806 - 
season, and in the untreated fields production was reduced to almost nothing. 
In fact, none of these untreated fields produced more than one-third of the 
regular crop. Most of the growers, however, treated their fields with a 50- 
percent cryolite dust, containing 0. 5-percent rotenone, which wa.s added .to pre- 
vent the development of aphid infestations. A very satisfactory pepper crop was 
obtained in the fields so treated. 
There has "been a considerable demand in recent yea_rs for potted ornamented, 
peppers, especially at Christmas time. A report wa.s received this season of an 
entire greenhouse full of these plants being so badly damaged by the pepper 
weevil that all pods were lost, and hence the plants made valueless. 
Hew areas reported infested for the first time by the pepper weevil in 1941 
included Temecula- in Riverside County, Calif., and Phoenix- Axiz 0 (See also 
report of infestation from Huoccs County,' Tex c Insect Pest Survey Built' I7o* 8, n. 
594.) (Roy E, 0 ampb ell and J. C. Elmore, Bureau of Entomology' and Plant Quaran- 
tine, U. S. P. A „ ) 
PEA WEEVIL : The average pea. weevil infestation in tlie Pa.louse area of 
Idaho and' Washington, ns determined from 2,119 weevil— infestation, records ob- 
tained from the Seed Division of the Agricultural Marketing Service, involving 
1 , 136,322 sacks of pores or approximately 139. 085 >000 pounds of dry peas, was 
4.49 per’eanuc In ‘’940 it was '4„06 percent. The average for all crops sampled 
in Washington during ?.94i was 4-36 percent, whereas in' 1940 it was 4.17 percent. 
In Idaho the average for 'all "ooints in the Paiouse area for 194l was 4.96 per- 
cent, while ill 194-0 it was 3.73 percent c Those figures show that thorn was an 
increase in the average inf os cation for the region a.s a whole of 0.48 percent.- 
The ihcrpa.se in Washington, for 1941 over 194 j was 0 e l9 percent, while in Idaho 
it was 1„21 percent. Those increases 8 re 00 ••clod in spite of the fact that at 
lea.st 1,000,000 pounds of dust containing r: tenone was used to control the pest, 
can be attributed to 'unfavorable weather conditions that prevailed during the 
dusting season and to the fact that the winter of 1940- -4l was the fourth con- 
secutive winter favorable for weevil survival. (T. A. Brindley, Bureau of 
Entomology and Plant Quarantine, U. S. D. A.) 
POTATO PSYLLJ.D, — Surveys on all of the important host plants in Nebraska 
a.nd Wyoming showed significant increases -in abundance of potato psyllr.ds in 
1941 from 1940., Initial infestations in May were larger and scnewlv* 0 . earlier- 
than norm air Populations on potatoes growing in cull- tuber dumps in the Forth 
Platte Valley of Wyoming and Nebraska, reached a peak of 107^4' 'adults pev 3 00 
sweeps on July 2, and after these plants dried up in the middle of July pro- 
vided an important source of infestation to late plantings of potatoes ^nd 
tonntocs„ On matrimony vine populations reached a. peak of 73^6 adults cn June 
25 . On wild groundcherry psyllid adults reached a. ponk of 15 o 6 on- July 9, as. 
compared with 5<*6 at the peak of infestations on July 10, 1940„ Infestations 
on early planted potatoes increased rapidly the first 2 weeks in July and 
reached a. peak of l4»7 adults per 100 sweeps on July l6o The damage to un- 
treated early plantings was 100 pore -nt 0 Populations on later plantings of 
potatoes were approximately one-third of that on the early crop, but were about 
3 times the number on the same crop in 1940 , On tomatoes adult populations 
reached a peak of 5*6 per 100 sweeps on July 2, but declined to 1.2 on July 
23 , owing to hot weather. Following this a build-up to 7*3 on August 20 was 
recorded. A killing frost on September 8, 18 days ahead of the normal time of 
