Anyone wanting this newsletter by email please send me
a note at the above email address and I’ll put you
the list. If any one has had an address change from a rural
route box number to a 911 address please let me know so
I can make the change. I have had to drop several producers
because of returned letters with incorrect/old addresses.
Although it is hard to make general comments for a state as big as Texas I
think overall we are starting off on the right foot. Unfortunately there
was some hail activity last week in Williamson, Robertson and Milam counties
where an estimated 1,500 acres of pecans in Milam were severely damaged.
The hail activity started around Georgetown and extended to Hearne. Thousands
of acres of corn, milo, cotton and other crops were also damaged.
Asian Ambrosia Beetle
Its been awhile since this little insect has reared its head but I have received
a few calls this spring and thought
I should say a few words. Most of the calls have been from ornamental nurseries
so I’m not sure how many pecans have been infested.
Infestations from this insect are characterized by small
toothpick like protrusions from the main trunk and scaffold
limbs. Each “toothpick” represents an entry
by a mated female. These protrusions can be anywhere from
1/4 to 1 inch in length and are very fragile.
Infestations can occur as early as mid February and continue
up through May. Most infestations I have observed have
been on trees less than 4 inches in diameter and the reported
distribution has been east Texas (mostly east of the Trinity
River) and along the gulf coast.
Any tree that is observed with numerous “hits” should
be removed and burned and surrounding trees should receive
trunk sprays of either chlorpyrifos (Lorsban 4E) or a pyrethroid.
Infested trees will die back to the lowest point of infestation.
Insecticide applications for this insect should have gone out by now. Phylloxera
galls will start to become apparent next month and there is nothing that
can be done after gall formation. For additional information on the different
pecan phylloxera species see Pecan South, May-June 1987, pp 5-12, “Identifying
Phylloxera” by Manya Stoetzel.
Small holes in the new foliage are usually the result of sawfly activity. Sawfly
larvae can be found on the underside of the leaf and are the same color as
the leaf so they are hard to spot. These larvae are actually the larvae of
a wasp (Hymenoptera) and there is only one generation per season. No insecticide
is needed for this insect.
Pecan nut casebearer
This is a reminder that producers in the northern part of the state should
be placing their PNC pheromone traps in the orchard.
The PNC pheromone trap has to be one of the most useful
pest management tools you can use. These traps are inexpensive
and will provide you with important information on the
start of PNC activity. Although these traps can not tell
you if you have to treat or not this trap will tell you
when egg lay starts and when nut entry starts. From many
years of trap monitoring I am confident that egg lay starts
between 7 to 10 days after your first initial catch with
nut entry starting 12 to 16 days after this initial catch.
PNC traps have been around for awhile now and should be
available at most dealerships that cater to the pecan industry.
Traps can be purchased as “kits” with kits
containing from 1 to 3 traps plus extra lures and trap
bottoms. Remember that any lure not being used should be
stored in the freezer. We recommend 3 to 5 traps be used
for orchards of 50 acres or less and at least 5 traps for
orchards larger than 50 acres.
I always recommend that producers purchase at least twice
what they might need. For example if you have a 25 acre
orchard and want to use 3 traps, order at least 6. If one
of our Spring storms blows you traps into t he next county
or into the river, you have extras on hand and will not
lose valuable monitoring time by having to wait for another
Additional information on PNC and the use of the pheromone
traps can be found in our Extension publication E-173.
You can access this publication through the Texas A&M
Entomology website at http://insects.tamu.edu
I currently have a pecan nut casebearer monitoring project
for 9 southern Texas counties which is being supported
by a grant from the Texas Department of Agriculture. This
project uses volunteer pecan growers to monitor PNC pheromone
traps and report trap catches and PNC activity (egg lay,
nut entry) to their respective county Extension agent.
The county agent will then used this information in their
mass media programs to inform county pecan growers of PNC
activity with in the county. Counties involved in the project
are: Brazoria, Galveston, Fort Bend, Colorado, Fayette, Wharton,
Lavaca, DeWitt and Victoria.
We are working on getting all of the information from
the volunteer producers posted on web sites. Fort Bend
county will be posting on http://aggie-horticulture.tamu.edu/FortBendPecan.
As other sites are established I will pass on the information.
NEW INSECTICIDES / MITICIDE
Intrepid 2F - Intrepid is a second generation Confirm and will be replacing
Confirm. Intrepid 2F is a Dow AgoScience product. Intrepid will be used at
4 to 8 ounces per acre where Confirm’s rate was 8 to 16 ounces per
acre. Intrepid is labeled for pecan nut casebearer, hickory shuckworm, walnut
caterpillar and fall webworm. Intrepid 2F is cleared for grazing.
Acraumite 50WS - Acramite 50WS is a miticide which is
labeled on pecans for pecan leaf scorch mite. Acramite
is a Crompton/ Uniroyal product. A few restrictions for
Acramite include a limit of one application per season,
a 14-day preharvest application time (PHI) and a 12 hour
restricted enty (REI).
Fury/Mustang Max - These insecticides are not new but
I did want to call attention to the fact that Mustang Max
which has the same active ingredient as Fury contains only
half the amount of active ingredient.
Warrior - Warrior is a Syngenta product and is labeled
on pecans for hickory shuckworm, pecan nut casebearer,
aphids, spittlebugs, stink bugs and phylloxera. Warrior
may be applied with either air or ground application equipment.
Warrior is applied at the rate of 2.56-5.12 ounces per
acre and has a 14 day preharest interval.
As with all pesticides always read the label before purchasing,
mixing and applying.
May 6, 2004
Georgia Pecan Growers Annual Conference
Contact: Jane Crocker, 229-372-5416
June 11-13, 2004
Oklahoma Pecan Growers Annual Conference
Contact: OPGAShelton @aol.com
June 16-18, 2004
Louisiana Pecan Growers Annual Conference
Baton Rouge, LA
Contact: Frances Knox 318-747-3003 or
July 11-14, 2004
83rd Annual Texas Pecan Growers Conference and trade Show
San Antonio, TX
Contact: TPGA - 979-846-3285
Texas County Meetings:
April 20, 2004
Guadalupe County field Day
Contact: Travis Franke - 830-379-1972
May 1, 2004
Bell County Field Day
Contact Dirk Aaron - 254-933-5305
May 3, 2004
San Saba County Field Day
Contact: Neal Alexander - 325-372-5416
May 8, 2004
Washington County Field Day
Contact: Larry Pierce 979-277-6212
May 10, 2004
Williamson county Field Day
Contact: Dale Mott - 512-943-3300
May 13, 2004
Gaines County Pecan Field Day
Contact - 432-758-4006
May 20, 2004
Wichita County Pecan Field Day
Contact: Steve Chaney - 940-716-5580