Title: Citrus insect and disease summary
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00066150/00108
 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 August 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: VID00108
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
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AREC-LA Mimeo
Series 71-38


CITRUS INSECT AND DISEASE SUMMARY
MID-AUGUST 1971

Statewide Index of Abundance


End July Mid Aug. Trend


0- - --


-2.0 A- -


Rust mite


Frt.


Lvs.


C. red
mite
O






Texas C. mite


High for
mites


High for
scales;
whitefly;
mealybug


End July Mid Aug.


U-"`-"


Trend


*- - .1 -..


H -' *. .


--> WFLY L
S- ~ Glover sc
Black sc
Sx-- --_ Mealybug
S -> 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: 80% of groves infested (Norm 59%); 67% economic (Norm 45%).
Population decreased slightly and will continue to decrease. However, it will
remain much above normal and in the high range. All districts are high: West (2.38)
East (2.22) Central (2.00) North (1.89) and South (1.56). Mites are more numerous on
fruits than on leaves.
Citrus Red Mite: 48% of groves infested (Norm 44%); 23% economic (Norm 22%).
Population decreased greatly and is now near normal and in the moderate range.
Further decrease is expected. Highest districts are West (1.31) and South (1.00).
Very few infestations will be important through September.

Texas Citrus Mite: 42% of groves infested (Norm 46%); 14% economic (Norm 21%).
A sharp drop has taken population below normal and into the low range. Further
decrease is expected through September in all districts.

Glover Scale: 71% of groves infested (Norm 61%); 12% economic (Norm 15%).
Population is near normal and at moderate level. Slight decrease is expected
until mid-September. Highest districts are South (1.29) and West (1.00).

Purple Scale: 57% of groves infested (Norm 56%); 1% economic (Norm 3%).
Chaff Scale: 44% of groves infested (Norm 48%); 2% economic (Norm 4%).
Yellow Scale: 29% of groves infested (Norm 55%); none economic (Norm 6%).
These three scales are below normal abundance in all districts. All will be at
low level.

Black Scale: 58% of groves infested (Norm 68%); 32% economic (Norm 49%).
This scale reached the summer peak of abundance late in July. It will decrease to
low level August through October. The population peak was in the high range but much
below normal. Districts vary greatly: highest is East (1.54) and the lowest is North (.f
Snow Scale: 27% of groves infested; 21% economic.
Population is similar in size to that of the preceding 5 months and is higher than
in any prior year. Temporary decrease is expected.

Whitefly: 73% of groves infested; 23% economic. Population dropped to moderate level
but is still above normal. Further decrease is expected through August, followed by
slight increase in September. Highest district is East (1.41).

Mealybug population has dropped to the normal low level and is not likely to be of
concern for the remainder of the year.

Spray Notes: Recent rains have caused high soil moisture and a rank growth of ground
vegetation in most citrus groves. The resulting high humidity favors trunk diseases
and brown rot of fruit. It is advisable to chop the cover rrop to impnrve ventilntion
and in groves with a history of brown rot, apply a copper spray to the lower 6 feet of
tree in August.


530 August 17, 1971 WAS


W. A. Simanton


AGRICULTURAL RESEARCH AND EDUCATION CENTER
LAKE ALFRED, FLORIDA


- 1.0




- 0.5


i i




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