Title: Citrus insect and disease summary
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00066150/00112
 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: Mid November 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: VID00112
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

b AREC-LA Mimeo Series 71-46
AGRICULTURAL RESEARCH AND EDUCATION CENTER
LAKE ALFRED, FLORIDA
G CITRUS INSECT AND DISEASE SUMMARY
END OF OCTOBER 1971

Statewide Index of Abundance
Mid Oct. End Oct. Trend Mid Oct. End Oct. Trend
2.0 Frt.
e.0----- HUME LIBRARY
Lvs.
Rust mite
1371
1.5
High for
mites V r_11

1.0 High for u.
scales; a----
scales; --> Black sc le
whitefly

._----->Glover scale
-v->- --- Snow sea e
0.5 x----
SC. red mite

8I-----=-
Texas C. mite

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 70%); 66% economic (Norm 49%).
Population is above normal and in the high range. Leaves and fruit are infested to about
the same extent. Gradual decrease is expected in a majority of groves, but a few groves will
show increase. Highest districts are West (2.38), South (2.19), Central (2.10) and North (1.91).
Citrus Red Mite: 24% of groves infested (Norm 28%); 3% economic (Norm 7%).
Population remained static near the low level normal for October. It will remain low and
below normal with very few groves developing heavy infestations. Highest district is West (.47).
Texas Citrus Mite: 24% of groves infested (Norm 23%); 3% economic (Norm 7%).
This mite increased slightly but population is still normal and in the low range. Further
increase is expected. A few heavy infestations will develop in scattered areas. Highest dis-
tricts .are West (.47) and East (.41).
Glover Scale: 60% of groves infested (Norm 62%); 2% economic (Norm 9%).
Population is below normal and in the low range with slight increase expected. Highest
districts are West (.93) and South (.75).
Purple Scale: 54% of groves infested (Norm 56%); 1% economic (Norm 3%).
Chaff Scale: 37% of groves infested (Norm 41%); 1% economic (Norm 4%).
Yellow Scale: 20% of groves infested (Norm 55%); none economic (Norm 9%).
The 3 armored scales named above are all below average abundance and at low population
levels. Little change is expected.
Black Scale: 62% of groves infested (Norm 32%); 27% economic (Norm 10%).
Population is moderate but much above normal for October. It is a dispersed population
with very few infestations heavy enough to be important at this time. Decrease is expected.
Highest districts are Central (1.45) and East (1.09).
Snow Scale: 30% of groves infested; 22% moderately or heavily infested. Population is near
the level of the past 6 months and higher than in any prior October. Little change is expected.
Whitefly: 87% of groves infested; 34% economic. Population is the highest for October in
20 years of record. This is true for the larval stage which is the feeding form and also for
the egg, pupa and adult stages. This high population together with the ample rainfall in
September has caused the red and yellow Aschersonia fungi to be very abundant and conspicuous
on the undersides of citrus leaves. Although the population of living whiteflies will decrease,
the beneficial and colorful Aschersonia will persist through the winter. Highest districts
are East (1.73), West (1.69), South (1.15) and North (1.06).
Mealybug population will remain in the low range despite a temporary increase.
Melanose is slightly below normal October abundance on both leaves and fruit.
Fruit Splitting is less evident than in the prior 2 years. The 1971 October index is .09 as
compared to .31 in 1969 and .30 in 1970.


530 November 5, 1971 WAS


W. A. Simanton




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