| 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
||End of August/September 1972
||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
hUiV LI AfTY
7 -450-9/12/72-WAS-Lake Alfred, Fla.
AGRICULTURAL RE: AR91H AND EBUGATIOf FCNTER LAKE ALFRED, FLORIDA
.t I- ..- J ',_ i' lGI
CITRUs-ISBCI-_ANDDAS E SMARY
END OF AUGUST 1972
Statewide Index of Abundance
Mid Aug. End Aug. Trend Mid Aug. End Aug. Trend
~~---------- "-- -
-- - Lvs.
Rust mite -
1.5 R Black sc le
High for __ Whitefly L
High for ---V
Texas C. mite witefly
-- Snow scale
S0.5-> Glover sale
C. red 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: 72% of groves infested (Norm 57%); 58% economic (Norm 39%).
Population decreased briefly but is expected to increase in late September and persist
above normal and at high level through November. Heavy infestations may be expected in 30%
of groves. Highest districts are South (2.33), Central (2.21), North (1.43), West (1.40)
and East (1.14).
Texas Citrus Mite: 41% of groves infested (Norm 22%); 16% economic (Norm 8%).
Population decreased but was the highest on record for August. Although further decrease
to low level is predicted through September, population will remain higher than average.
Highest districts are West (1.73) and Central (1.35).
Citrus Red Mite: 13% of groves infested (Norm 28%); 3% economic (Norm 12%).
In contrast, population of this spider mite is the lowest on record for August. Although
it will remain very low in all districts, scattered groves will develop important infestations
Black Scale: 82% of groves infested (Norm 57%); 58% economic (Norm 35%).
August population is the highest in 21 years of record but is much lower than at the
mid-July peak. Population will remain above normal and in the high range into December
despite gradual decrease. Highest districts are Central (2.19), North (1.88), West (1.64)
and East (1.40).
Citrus Snow Scale: 36% of groves infested; 27% economic.
Population decreased slightly from the record high level at the end of July. Gradual
increase is expected after September.
Glover Scale: 58% of groves infested (Norm 48%); 5% economic (Norm 8%).
Purple Scale: 40% of groves infested (Norm 42%); 1% economic (Norm 2%).
Chaff Scale: 35% of groves infested (Norm 34%); none economic (Norm 3%).
Yellow Scale: 25% of groves infested (Norm 40%); none economic (Norm 6%).
These 4 armored scales are all below normal abundance and at low to moderate level in all
districts. Only scattered groves will harbor important infestations during the remainder of 1972.
Green Scale: 22% of groves infested (Norm 5%); 14% with moderate to heavy infestations (Norm 1%).
This scale is abnormally numerous but is not likely to be important. Decrease to low
level is predicted in December.
Whitefly: 72% of groves infested (Norm 55%); 27% economic (Norm 16%).
Population of larva and adult forms are much above average and in the high range. Little
change is predicted. Highest districts are South (1.18), Central (1.09) and West (1.07).
SPRAY NOTES: Rust mite will continue to be a threat to a majority of groves. Recommended
control materials include chlorobenzilate 4E at 1.25 pints per 500 gallon of spray, or
Carzol SP at 10 ounces, or wettable sulfur at 25 to 50 pounds, or Guthion 2 at 5 pints.
Combination miticides to control rust mite and spider mites include ethion 4 at 3.75 pints
per 500 gallon, or Delnav 4 at 3.75 pints, or Trithion at 3.75 pints (except on grapefruit
that is not fully colored), or Kelthane MF at 5 pints. The latter should not be used in
groves infested with snow scale unless it is used with a scalicide.
THIS IS THE FINAL PEST SUMMARY AND FORECAST TO BE ISSUED BY THE LAKE ALFRED RESEARCH
CENTER. IT IS POSSIBLE THAT A SIMILAR PEST FORECASTING SERVICE WILL BE UNDERTAKEN BY THE
EXTENSION DIVISION IN 1973.
September 12, 1972 W. A. Simanton