Title: Citrus insect and disease summary
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Permanent Link: http://ufdc.ufl.edu/UF00066150/00106
 Material Information
Title: Citrus insect and disease summary
Series Title: AREC-LA Mimeo series
Physical Description: v. : ; 28-34 cm.
Language: English
Creator: Citrus Experiment Station (Lake Alfred, Fla.)
Agricultural Research and Education Center (Lake Alfred, Fla.)
Publisher: Citrus Experiment Station.
Place of Publication: Lake Alfred Fla
Publication Date: End July 1971
Copyright Date: 1966
Frequency: semimonthly
regular
 Subjects
Subject: Citrus -- Diseases and pests -- Periodicals -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
periodical   ( marcgt )
 Notes
Issuing Body: Issued by the Citrus Experiment Station (Lake Alfred, Fla.) <July 1966-Jan. 1971, later called Lake Alfred (Fla.) Agricultural Research and Education Center, Feb. 1971-Aug. 1972>.
General Note: Description based on: Mid July 1966; title from caption.
General Note: Latest issue consulted: End of August 1972.
 Record Information
Bibliographic ID: UF00066150
Volume ID: VID00106
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 71265791
lccn - 2006229397

Full Text


S AREC-LA Mimeo
/ Series 71-36
/1 AGRICULTURAL RESEARCH AND EDUCATION CENTER Series 71-36
LAKE ALFRED, FLORIDA

CITRUS INSECT AND DISEASE SUMMARY
MID-JULY 1971

Statewide Index of Abundance
End June Mid July Trend End June Mid July Trend

-2.0 C -->Frt
Texas '
C. mite Lvs
S/ Rust mite

-1.5
S_____High for ,------> Black sc
mites''

1.0 C. red miteHigh for ---- -- WFLY L
scales; Glover s
whitefly; Mealybug
mealybug K

-0.5 x -> Snow sc





NOTE: Only pests or conditions of general or current interest are reported.
Forecasts are for 1 month in advance unless otherwise indicated.
Citrus Rust Mite: 85% of groves infested (Norm 58%); 68% economic (Norm 34%).
Population on both leaves and fruit is the highest for mid-July in 20 years of
record. Leaf population will decrease late in July whereas the fruit population will
increase through July and decrease in August. Statewide population will continue to be
above normal and very high despite the predicted decreases. All districts are high:
North (2.32) West (2.25) South (2.17) Central (2.00) and East (1.60).
Citrus Red Mite: 74% of groves infested (Norm 70%); 44% economic (Norm 41%).
The population peak occurred in late June; it was above normal and in the high range.
Decrease started early in July and will continue through August when population is ex-
pected to be low. Highest districts are: South (1.78) West (1.77) and North (1.38).
Texas Citrus Mite: 90% of groves infested (Norm 76%); 71% economic (Norm 53%).
Population attained the summer peak early in July. It was in the high range and
much above normal. Decrease to low level is expected in August. All districts are
high: North (2.24) South (2.11) Central (2.10) West (1.77) and East (1.76).
Glover Scale: 82% of groves infested (Norm 80%); 20% economic (Norm 29%).
Population decreased and is now below normal. It is expected to drop out of the
high range in July and continue to decrease to low level in August. Highest districts
are South (1.50) and West (1.08).
Purple Scale: 77% of groves infested (Norm 75%); 6% economic (Norm 12%).
Population is near normal and in the moderate range with slight decrease expected.
Highest district is South (1.11).
Black Scale: 69% of groves infested (Norm 85%); 42% economic (Norm 65%).
Population of this scale has entered the high range but is below normal. Little
change is expected. Highest districts are East (1.91) South (1.39) and Central (1.34).
Chaff Scale: 50% of groves infested (Norm 66%); 1% economic (Norm 13%).
Yellow Scale: 43% of groves infested (Norm 66%); none economic (Norm 11%).
Both of these scales are below normal abundance and are expected to occur only as
light infestations. Populations will remain low to moderate in all districts.
Snow Scale: 28% of groves infested; 20% economic. Population increased in early July
and is higher than in July of any prior year. Slight decrease is expected.
Whitefly: 79% of groves infested; 22% economic. Population is in the high range and
slightly above normal. Temporary increase is expected. Highest districts are East
(1.52) and West (1.12).
Mealybug: 64% of groves infested; 14% economic. Population has attained the annual
peak of abundance at moderate level and much below normal. Decrease is expected.


550 July 19, 1971 WAS


W. A. Simanton




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