| Material Information
||Citrus insect and disease summary
||AREC-LA Mimeo series
||v. : ; 28-34 cm.
||Citrus Experiment Station (Lake Alfred, Fla.)
Agricultural Research and Education Center (Lake Alfred, Fla.)
||Citrus Experiment Station.
||Place of Publication:
||Lake Alfred Fla
||Mid August 1971
||Citrus -- Diseases and pests -- Periodicals -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
periodical ( marcgt )
||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>.
||Description based on: Mid July 1966; title from caption.
||Latest issue consulted: End of August 1972.
| Record Information
||University of Florida
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 71265791
lccn - 2006229397
AGRICULTURAL RESEARCH AND EDUCAfION CENTER
LAKE ALFRED, FLORIDA
CITRUS INSECT AND DISEASE SUMMARY
END OF JULY 1971
Statewide Index of Abundance
End July Trend Mid July End July
SFrt. -~ ---..--
C. red mite
High for V-- -- V-_
'A L :, i I
i- n-------.--- .=,- .
--> WFLY I
.--- ---> Glover 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: 81% of groves infested (Norm 63%); 71% economic (Norm 44%).
Population is above normal and at very high level on both leaves and fruit. Although
decrease is expected after mid-August, population will continue in the high range. All
districts are high: West (2.70) North (2.47) South (2.23) Central (1.92) and East (1.31).
Citrus Red Mite: 66% of groves infested (Norm
Population is near normal and at moderate
occur in August. Highest districts are South
63%); 34% economic (Norm 36%).
level. Further decrease to low level will
(1.69) West (1.54) and Central (1.28).
Texas Citrus Mite: 72% of groves infested (Norm 69%); 45% economic (Norm 43%).
Population of this mite also is near normal but is still in the high range. It will
decrease rapidly to very low level in August. Highest districts are Central (1.62)
South (1.54) and East (1.35).
Glover Scale: 72%
of groves infested (Norm 76%); 14% economic (Norm 26%).
below normal and has dropped to moderate level. Little change is
districts are South (1.62) and West (1.09).
Purple Scale: 65% of groves infested (Norm 68%); 5% economic (Norm 6%).
Chaff Scale: 41% of groves infested (Norm 57%); 2% economic (Norm 6%).
Yellow Scale: 35% of groves infested (Norm 63%); none economic (Norm 8%).
Populations of these 3 scales are below normal and all are in the low range.
Further decrease is predicted. No severe infestations are expected in any district.
Black Scale: 68% of groves infested (Norm 81%); 41% economic (Norm 63%).
Statewide population continued in the high range but is below normal. Little change
is expected. Infestations vary greatly in severity. Some heavy infestations will occur
in all districts but these are not likely to become important this year. Highest dis-
tricts are East (1.94) South (1.92) and Central (1.24).
28% of groves infested; 20% economic. Population is greater than in any
Increase is predicted.
Whitefly: 75% of groves infested; 26% economic. Population continued in the high range
and is above normal. Decrease is expected. Highest district is East (1.68).
Mealybug: 57% of groves infested; 12% economic. Population is below normal and low.
Decrease is predicted.
Spray Notes: Application of the summer spray containing FC 435 oil should be completed
by mid-August, especially with early maturing varieties.
Watch for buildup of rust mites in groves that were last sprayed in June.
Sulfur can blemish fruit when applied in very hot weather. Recommended practice
is to stop application when the temperature goes above 900 F.
550 August 2, 1971 WAS
.. .. -B' P -
us ^/i^ 'pP/Jsp'/
t !. -. ". 'U i i
W. A. Simanton