Title: Citrus insect and disease summary
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00066150/00089
 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 September 1970
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: VID00089
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
CITRUS EXPERIMENT STATION
LAKE ALFRED, FLORIDA


CES Mimeo Series 71-8


CITRUS INSECT AND DISEASE SUMMARY
END OF AUGUST 1970


Statewide Index of Abundance .- -


Mid Aug. End'Aug. Trend

-.-- --- Frt.

Rust mite


Lvs.


0
S C. red mite





Texas C. mite >


High for
mites


High for


Mid Aug. end







1\ )- WF Adult

\ > WF Larva


-.---- 4


scales;
whitefly,
mealybug


. -'" ------- Blk sc


-> Snow sc
X^ '> Mlybug
> Glover s


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:
On leaves: 73% of groves infested (Norm 50%); 51% economic (Norm 33%).
On fruit: 86% of groves infested (Norm 60%); 70% economic (Norm 44%).
Population decreased but is still very high and much above normal especially on
fruit. Although further decrease is expected, increase is likely to resume late in
September. All districts have high population on fruit. Highest districts as to leaf
populations are West (2.45) North (1.79) South (1.62) and Central (1.39).


Texas Citrus Mite:
Citrus Red Mite:
Populations o
Further decrease i,


20% of groves infested (Norm 23%); 11% economic (Norm 9%).
33% of groves infested (Norm 28%); 11% economic (Norm 12%).
both spider mite species decreased to the normal low level.
expected. All districts are low.


Glover Scale: 57% of groves
Purple Scale: 38% of groves
Chaff Scale: 34% of groves
Population decreased to


infested (Norm 44%); 5% economic (Norm 8%).
infested (Norm 44%); 5% economic (Norm 2%).
infested (Norm 34%); 3% economic (Norm 3%).
the normal low level. All districts will remain low.


Black Scale: 57% of groves infested (Norm 57%); 25% economic (Norm 36%).
This scale decreased to the moderate range in August and was below normal
abundance. Population will remain near the current level through September and will
be only of localized importance. Highest districts are Central (1.33) and West (1.09).
Yellow Scale: 34% of groves infested (Norm 43%); 6% economic (Norm 7%).
Population decreased and will remain near the current level which is low and below
average. Highest district is North (.88).
Snow Scale: 27% of groves infested; 14% with moderate to heavy infestations. This
scale increased and will continue to spread and intensify.
Whitefly: 81% of groves infested; 23% economic.
Population is the highest for August in 19 years of record. It will advance
further into the high range in September. Highest districts are North (1.27) Central
(1.25) West (1.12) South (1.07) and East (.91).
Mealybug: 55% of groves infested; 11% economic.
Population dropped to the low range but is still the highest for August in 19 years
of record. Decrease will occur in all districts. Highest district is South (1.14).

Spray Notes: Sulfur can blemish fruit when applied in very hot weather. Sprays con-
taining oil can cause leaf drop when applied in hot weather and when soil moisture is
low. Other sprays or dusts may show phytotoxicity at high temperatures. Recommended
practice is to stop application when the temperature goes above 900F or when moisture
stress threatens. In July 1970 at Lake Alfred, nine days had temperatures above 90F
for more than 2 hours.

THE NEXT SUMMARY WILL BE ISSUED EARLY IN OCTOBER.


600 September 3, 1970 WAS


-2.0


-->, '


W. A. Simanton




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