Title: Citrus insect and disease summary.
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 Material Information
Title: Citrus insect and disease summary.
Physical Description: Serial
Publisher: Citrus Experiment Station.
Publication Date: Mid-April 1971
Copyright Date: 1971
 Record Information
Bibliographic ID: UF00066150
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: 71265791 - OCLC

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AGRICULTURAL RESEARCH AND EDUCATION CENTER
LAKE ALFRED, FLORIDA


j; 7/-2~


AREC-LA Mimeo
Series 71-26


CITRUS INSECT AND DISEASE SUMMARY
MID-APRIL 1971

Statewide Index of Abundance
>r. Trend End' Ma:


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: 68% of groves infested (Norm 61%); 47% economic (Norm 41%).
Population decreased and will continue to decline. It is expected to drop out of
the high range and be at normal level for the first time in a year. Highest districts
are West (1.93) South (1.92) and Central (1.43).


Citrus Red Mite: 46% of groves infested (Norm 48%); 17% economic (Norm 17%).
Population is at the moderate level normal for April. Rapid increase is
for May. Heavy infestations are likely to develop in 15% of groves. Highest
are South (1.15) and East (.74).


predicted
districts


Texas Citrus Mite: 37% of groves infested (Norm 41%); 13% economic (Norm 19%).
This mite also will increase in April and May but will be in the normal moderate
range. Heavy infestations may be expected in about 12% of groves. Highest districts
are South (.96) and Central (.76).


Six-spotted Mite:
Population is
are likely to have


7% of groves infested; 1% economic.
normal for April. Slight increase is expected but only 2% of groves
important infestations.


Glover Scale: 86% of groves infested (Norm 80%); 10% economic (Norm 22%).
Population is below normal and moderate. Little change is expected. Highest district
is South (1.15).
Purple Scale: 79% of groves infested (Norm 81%); 5% economic (Norm 12%).
This scale will remain below normal and at moderate level. Highest district is
West (1.00).
Chaff Scale: 52% of groves infested (Norm 63%); 1% economic (Norm 12%).
Population will remain low, and below normal in all districts.
Black Scale: 13% of groves infested (Norm 26%); 2% economic (Norm 10%).
Statewide population will continue below normal and low but sharp increases are ex-
pected in scattered groves in East and West districts.
Yellow Scale: 37% of groves infested (Norm 66%); none economic (Norm 11%).
April population is the lowest since 1963. It will remain unimportant.
Snow scale will be inactive through April but increase is expected in May.
Aphids reached their spring peak at mid-April below normal level.
Whiteflies (Larvae) and Mealybug will continue below normal and low through April, then
increase rapidly in May.
Spray Notes: The postbloom spray is important to control rust mite, melanose, scab
(2nd application) and snow scale. Nutritionals can be added in this spray. See the
1971 Spray and Dust Schedule for the recommended mixtures and the correct timing.


600 April 16, 1971 WAS


W. A. Simanton




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