Title: Control of pecan insects and diseases
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Permanent Link: http://ufdc.ufl.edu/UF00076522/00001
 Material Information
Title: Control of pecan insects and diseases
Physical Description: Book
Creator: Phillips, Arthur M.,
Publisher: Big Bend Horticultural Laboratory, University of Florida
 Record Information
Bibliographic ID: UF00076522
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 145740982

Full Text
44



ArLP.T6.Tri./A. EXPERIMENT STATIONS
.*'.;'""..,',.*'.::" .;: .T LORTDA "' V^
EIG BEN3D H'F'Jr ICULTUXRA" LABORATORY i
HOI;TICELLO, FLORIDA i.,

APRIL 20, 1964

Big Bend Hort. Lab. Mimeo Report PEC 64-1


CONTROL OF PECAN INSECTS AND DISEASES

by Arthur H. Phillips, Assoc. Entomologist
and
John R. Large, Assoc. Pathologist

A large number of insects and disease organisms attack the pecan trees and
threaten the crop of nuts. Some insects are present throughout the growing sea-
son, and others for shorter periods, either early or late. The disease organisms
that infect the pecans usually attack the growing tissues, including leaves,
shoots and nuts. Diseases spread most rapidly early in the growing season during
periods of damp weather.

It is essential that the pecan grower control harmful insects and diseases
Lf he is to obtain a profitable crop of nuts. In applying spray materials it is
important that all leaves and nuts be covered with the materials. When desir-
ible, the spray materials recommended for control of insects and diseases may be
combinedd to save time and labor.

The following spray schedule, if carefully followed, will give commercial
control of most of the important insects and diseases that attack pecans. How-
aver, a general spray schedule is not always the most satisfactory one for a
articularr orchard and the control program should be worked out to meet local
conditions.

Precautions.--The insecticides listed in this spray schedule are poisonous
:o humans and animals and should be handled with care. Keep properly labeled
md stored where children cannot have access to them. Remove grazing animals
from groves for 2 3 weeks after spraying.




p


SPRAY PROGRAM FOR CONfTROL OF PECAN INSECTS AND DISEASES


Number and Time
'f spray appli-
::ations


For Contro. of:


Spray IIateral and Amount to
mix i:i 100 gaJ.lons of water


First appli-
-a.tion when
'iLrst leaves
are half
Vrown


Scab, downy
spot, nur-.
sery bligit


Pecan leaf
casetearer


4-1-1 JC Bordeaux mixture
or (1)
0.5 pound 65% Dodine(Cyprex)
or
2 lbs. Zineb (76%) + 1 qt.
Summer Oil Emulsion
plus
2 lbs, 15% Parathion
or
3 lbs. 25% Malathion


To protect tha fol-
iage an addition
of Summer Oil to
Zineb improves its
fungicidal action.


'o;-nd appli-
-.tion about
the time the
tips of the
Small nuts
have turned
brown


Scab, rurser7
blight, brown-
leaf spot,
Pecan nut
casebearer,
Pecan leaf
casebearer,
aphids or
iites.


0.5 pound 65% dodine
or
6-2-100 Bordeaux mixture
or
2 lbs. Zinuh (76%) + 1 qt.
summer oil emulsion
plus
2 lbs. 15% Parathion
orx
- Ibs. 25% Malathion
or
S lbs. 25% EPf
or
2 lbs. 25% Guthion
or
2 lbs. 50% Thiodan
or
lbs.50 DDT(3)
2 Ibs. 50- DDT


To protect foliage
and nuts add 4 Ibs.
Zinc sulphate(2)
if rosette is pre-
sent. Use Parathion
if aphids or mites
require treatment.
If pecan nut case-
bearer infestat-
'ions are heavy
make a second ap-
plication 1 week
later of any of
the insecticides
listed.


thirdd appli- Scab, nursery Fungicide same as for Add 4 lbs. Zinc
actionn three blight, pow- second application sulphate if ro-
reeks after dery mildew, sette is present.
second blotch, brown
leaf spot,
rosette

fourthh appli- Scab, nursery Fungicide same as for Apply insecticides
:ation three blight, pow- second application if insects require
weekss after dery mildew. control.
:hird plus
Pecan leaf 2 lbs. 15% Parathion
casebearer, or
aphids or 3 lbs. 25% Malathion
mites.


(continued on next page)


Remarks


- ___


-- I ---







(continued)


Spray Program For Control of Pecan Insects and Diseases


Number and Time
of spray appli-
cations


For Control of:


Spray material and amount to
mix in 100 gallons of water


Fifth appli- Scab Fungicide same as for If aphids are pre-
cation second application sent add Parathion
or Nalathion.

Sixth appli- Scab Fungicide same as for
cation cover second application
spray about
.August 10 Hickory 2 lbs. 25% EPN or Guthion Apply 2nd and 3rd
to 15th. Shuckworm shuckworm sprays at
2-week intervals.

Dormant spray Spanish 10-10-100 Copper Sulfate Make 3 annual appli-
Moss Calcium arsenate cations where reg-
ular spray schedule
is not followed.

OTES: (1) Increase Dodine to 1-100 in wet seasons if scab becomes severe.
Dodine causes defoliation of Ioore and Van Deman pecans when
applied in April. Use Zineb plus Summer Oil (the white flowable
type) in April and May, then Dodine in June, July and August.
(2) Zinc sulfate is very caustic and will rust out the spray
machine. Wash thoroughly with soap and water after using Zinc
sulfate.
(3) DDT may be used, but increases aphids and mites.


Remarks:




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