-,S7 _ 
aphids ha ve increased very rapidly so there is no'" an unusually 
heavy infestation- for this time of the year. The first flush 
of growth is out of danger but severe damage may result to trees 
injured "by cold, 
APHIIDAE 
California Monthly News Letter Los Angeles Horticultural Commission # Volurae 
10, No. 4 (April 15): The spraying operation; conducted this 
season in citrus orchards for the control of an unusually hea' r y 
infestation of aphids has "been v ery Tell handled and satisfactory 
control obtained throughout the County according to Deputy 
Horticultural Commissioner H+H.T'ilcornb, in Charge of Fumigation 
• and spraying. During the first two ""eeks of April parasites en- 
tered into the control to such an extent that- since the middle of 
April practically no further spraying has needed to be clone. The 
parasites mostly responsible for such .zood control in the majority 
of groves seem to be the western syrphid fly and a fungus parasite 
which is probably Entomophthora apbidis . 
FLORIDA FLOWER THRi'FS ( Frankliniella tritici bispinosa 
Morgan) 
Florida J,R» Watson (April 25): The common flower thrips has been unusually 
abundant. This is due to the unusual dry weather w hidh prevailed 
up until the middle of April. 
CITR0PHILU3 MEALYBUG ( Pseudococc us aphani Green) 
California Monthly News Letter Los Angeles County Horticultural Commission, 
Volume 1,0,N . 4 (April 15): A preliminary summary of present 
inspections made by H, M, Armitage, Deputy Horticultural Commissioner 
in charge of Insectary, indicates that infestations are running 
7 per cent heavy, 14 per cent' medium, and the balance light. This 
is somewhat heavier than previously estimated, but may be attribu- 
ted to the fact that the initial inspections are being made in the 
kno^n neavily inf ssted ar>is, 
Production of Crypt ola emus at the county insectaries indicates 
that it will be possible to cover all heavy infestations during 
April, and those of medium degree during the first two weeks of 
May. The balance of production will be used in covering as many 
of the light infestations as. may seem practical. All liberations 
will be completed in sufficient time so that, providing field 
conditions are favorable, control of the mealybug will be secured 
before any serious injury occurs. Liberations of thirty adult 
Cryptolaemus per tree in lots of ten at ten-day intervals are 
contemplated in thecase of heavy infestations, in an effort to 
"speed-up" control. In a similar manner medium inf estations will 
be covered, using twenty beetles per tree. In the case of light 
infestations only ten beetles will be used per tree as in past 
si ■ i sons. 
