s-i HUME LIUBR UL


[LR 9 Ir 371 CI


I r A c I I-:.. 1: nw-vri2S


JRAL RESEARCH AND EDUCATION CENTER
LAKE ALFRED, FLORIDA

kUS INSECT AND DISEASE SUMMARY
END OF FEBRUARY 1971


AREC-LA Mimeo
Series 71-21


statewide Index of Abundance


I I
.lnd rebu. irend


-2.0


Rust mite
Lvs.

V--F ---)
Frt. -,-- -)


-1.5


High for


Mid Feb. End Feb. Trend


rust mite

High for__


Citrus red mite
o--a 0-- ->


0a C
Texas C. mite


scales; white-
fly; winter
high for
CRM & TCM


*--------->Glover sc
S--- >Purple sc
V 7- Snow sc
X ---- --WFLY L
0o-----> Yellow 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: 72% of groves infested (Norm 62%); 50% economic (Norm 41%).
Population decreased but is still above normal and in the high range. Little change
is expected. Highest districts are South (2.23) West (2.18) Central (1.37) and North (1.33).
Citrus Red Mite: 53% of groves infested (Norm 37%); 18% economic (Norm 14%).
Population continued to be in the low range although above normal for February. In-
crease is expected late in March. Highest districts are South (1.17) and Central (.73).


Texas Citrus Mite: 33% of groves infested (Norm 31%); 13% economic (Norm 11%).
Population is near normal and low. An upward trend is predicted for April.
district is South (.71).


Highest


Six-spotted Mite: 7% of groves infested (Norm 7%); 1% economic (Norm 1%). Gradual increase
is expected late in March.


Glover Scale: 80% of groves infested (Norm 78%); 8% economic (Norm 17%).
Purple Scale: 75% of groves infested (Norm 77%); 3% economic (Norm 9%).
These scales are at moderate level and slightly below normal abundance.
expected in April. Glover scale is highest in South district (1.04); purple
highest in North district (.93).


Increase is
scale is


Chaff Scale: 54% of groves infested (Norm 9%); none economic (Norm 9%).
Population will continue below normal and low in all districts.
Yellow Scale: 40% of groves infested (Norm 63%); 1% economic (Norm 13%).
Population will remain low and below normal. Highest district is East (.70).
Snow Scale: 30% of groves infested; 16% economic. Population is higher than in any prior
month. Infestations have intensified and will continue to increase.
Black Scale: 17% of groves infested (Norm 33%); 6% economic (Norm 14%).
Population will remain below normal and very low in all districts through April.
Aphids will start to appear in mid-March and build up through April. The peak is ex-
pected to occur later than average. Population is predicted to be later and of greater
magnitude in cold damaged groves.
Whitefly adults will appear on the new foliage in late March and early April. They are
expected in normal numbers, fewer than in 1969 and 1970.
Spray Notes: For aphid control use Meta Systox-R at 5 pints per 500 gallon only on trees
that are not expected to bear fruit for one year. Systox 2 liquid at 5 pints is cleared
for use on bearing orange, grapefruit and lemon trees with a 21 day waiting period between
application and harvest. Phosphamidon 8 liquid at 5 pints may be used on mature orange,
grapefruit, tangerine or lemon trees provided there is a 15 day waiting period. Dime-
thoate 2.67 liquid at 4 pints per 500 gallon is registered for use only on mature orange
and lemon trees with a 15 day waiting period. All of these aphicides have systemic action
but require thorough and timely coverage of new foliage to be effective.


600 March 4, 1971 WAS


s .1 .Fl . Uw itI W P q4 I I I..


... --- I -


W. A. Simanton