Title: Citrus insect and disease summary
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00066150/00066
 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 1969
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: VID00066
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
/ 3 / CITRUS EXPERIMENT STATION CS M S 7-
LAKE AFE FORIDCA ES Mimeo Series 70-3
LAKE ALFRED, FLORIDA
CITRUS INSECT AND DISEASE SUMMARY
END OF JULY 1969

Statewide Index of Abundance
I I I I I
Mid-July End July Trend Mid-July End July Trend

-2.0 0
z, Rust mite


'' Black sc.
1.5 x

High for
mites

S0 Texas C. mite High for i__________
-O [] scales; --------- -->Glover so
whitefly,
C. red mite mealybug 0 --->Yellow sc

0.5





NOTE: Only pests or conditions of general or current interest are reported.
Forecasts are for 1 month in advance unless otherwise indicated.
Rust Mite: 86% of groves infested (Norm 63%); 71% economic (Norm 44%).
Infestations'in July were the highest in 18 years of record. During the last half of
the month an average of 37.4% of leaves and 41.7% of fruit were infested in groves that had
not received a miticide in the 30 days prior to counting. Little change is expected until
a downward trend develops about mid-August.
All districts are high: West (2.70), North (2.50), Central (2.17), South (2.00) and
East (1.55).
Texas Citrus Mite: 44% of groves infested (Norm 69%); 30% economic (Norm 43%).
Population is below normal and moderate. A few heavy infestations will occur until
the decrease becomes general in September. Highest district is Central (1.20).
Citrus Red Mite: 53% of groves infested (Norm 63%); 27% economic (Norm 36%).
Population of this spider mite is also below normal and in the moderate range. De-
crease to the low range is expected in September. Very few heavy infestations will develop
during the next 2 months. Highest district is North (1.10).
Glover Scale: 79% of groves infested (Norm 76%); 14% economic (Norm 26%).
Population is slightly below normal and in the moderate range. Decrease is expected
after mid-August. Highest districts are North (1.26) and South (1.00).
Purple Scale: 57% of groves infested (Norm 68%); 5% economic (Norm 6%).
Population in all districts is below normal and low, with little change expected.
Chaff Scale: 41% of groves infested (Norm 57%); 4% economic (Norm 6%).
All districts have subnormal populations which will remain low.
Yellow Scale: 67% of groves infested (Norm 63%); 9% economic (Norm 8%).
Population is near normal and decreasing. Very few infestations will be important.
Highest districts are North (1.21) and Central (.75).
Black Scale: 85% of groves infested (Norm 81%); 64% economic (Norm 63%).
Population was at the high level normal for the end of July. Although the downward
trend will become more evident by mid-August, population will continue in the high range for
another month. All districts are high at present: East (2.40), South (1.91), Central
(1.85), North (1.53) and West (1.27).
Snow Scale: 21% of groves infested; 9% with moderate to heavy infestations. Population is
higher than in any prior month. Little change is expected.
Whitefly: 71% of groves infested; 34% economic. Population decreased but is still above
normal and is expected to remain high until mid-August. Highest districts are East (2.35),
Central (1.25) and North (1.00).
Mealybug: 82% of groves Ti Tst-d.; ~,7.onomic. Population will continue to be above normal
and in the high range. IThk 0 Carr ,nowu, der way should drop population to moderate
level before September. Highesf'dieai E st (1.87), South (1.68) and Central (1.19).
Spray Notes: It is advsable t control rust mi e before more than 15% of leaves or fruit
are infested. If control is ew rd 49"gust, u e chlorobenzilate 4E at 1.25 pints, or
Nabac at 0.5 pint or wdttable sulfur at 25 poun per 500 gallons. Do not apply sulfur
within 3 weeks of an o 4pr y. pelnav, ethion and Trithion 4 also are effective.
600 August 4, 1969 WAS.'- C IV. Of i W. A. Simanton




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