f4 te 
counts and estimates made each year by workers at the Melrose High- 
lands, Mass., laboratory, in certain selected areas scattered through 
the territory generally infested with the pest. In 55 renaining 
Nobservation points," some of which were first located in 1911, the 
estimated average number of egg clusters per acre is at present 344 
whereas it was 112 a year ago. In another series of 34 vlots where 
Sample coliections of ergs, larvae, and »pupac are made for parasite 
recorcs the averave estimated number of eve clusters per acre is now 
1,675, whereas a year ago it was 680. Examinations of sample egg 
clusters from these 54 points have shown the average percentage of 
egg parasitizatiuon to be lower at present than a year ayo althouph, 
because of the large increase in the number of exe clusters, there 
are actually more of the principal parasite, Anastatus disparis 
Ruschka, per acre. 
Soil poisons for the cuntrol of white grubs.--L. G. uate. 
of the Coeur d'Alene, Idaho, field leboratory, reports that the final 
counts on mortality to transplant nursery stock in soil treated with 
powdered lead arsenate at the rate of 500, 1,000, and 1,500 pounds 
per acre, in white grub control experinents nn Re :ssey Nursery, 
Nebraska National Forest, show an excessive loss of trecs aia the 
application of the poison in 4 light. soil. The soll is a lisht sandy 
loam; the trees used were red cedar, Austrian pine, pondercsu pine, 
and jack pine. For 2-1 transplants (2 years in aie seed beds and 1 
year in the treated. transplant bed) the mortality from the lightest 
dosage of lead arsenate was roughly four tines Hes normal mortality 3 
for the heaviest cae wiki five te seven times the normal mor- 
tality. For 1-1 »ponde a and jack pine practically a complete mor- 
tality resulted from th eit used. Hoot development was re- 
y t 
tarded and height growth also somewhat stunted. The growth of cow- 
peas and rye, used as a cover crop, was Seriously retarded, the stand 
varying directly with the quantity of material disked into the soil 
before planting. 
th in Nebraska.~-Mr. Baunhofer siso reports that the 
decreased infestation of the pine tip moth (Rhys acionia frustrana 
bushnelli Busck) in 1932, as a result of high parasitization by the 
introduced parasite Vanpoviex frustranac Cush. , was followed this 
year by a marxed increase in eT of pondervsa pine in the younger, 
outlying plantations in the We sbraska National Forest. The plot with 
the greatest growth, in a 10-year-old plantation, nad a parasi tization 
of 73 percent last year, which reduced the ti» moth infestation from 
96 percent of all leaders infested in 1931 to 59 percent infested in 
1932. With 41 percent of the leaders uninfested in the spring of 1933, 
and a good prowing season, these trees put on an average height growth 
of 10.2.inches. This growth is more than a 500 percent increese over 
the 1.8 inches averaged for 1932, and is 100 percent greater than the 
growth made in any one year since wlanting. The older plantations did 
Piva? ti mot. 
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