Insect and Nematode Pests in Cotton: A Focus on Thrips Gene Burris - - PowerPoint PPT Presentation

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Nov 28, 2022 693 likes •831 views

Seed Treatments to Manage Insect and Nematode Pests in Cotton: A Focus on Thrips Gene Burris LSU Ag Center Efficacy of Seed Treatments Against Thrips Thrips occurrence in untreated plots Thrips efficacy changes due to rate increases

SLIDE 1

Seed Treatments to Manage Insect and Nematode Pests in Cotton: A Focus on Thrips

Gene Burris

LSU Ag Center

SLIDE 2

Efficacy of Seed Treatments Against Thrips

Thrips occurrence in untreated plots
Thrips efficacy changes due to rate

increases

Thrips efficacy changes due to the

addition of a nematicide

Using GreenSeeker NDVI for plant vigor

ratings

SLIDE 3

Fig.1 Thrips Occurrence In Untreated Plots

27.8 40.3 22 30.3 24.3 16.5 1 1 1 3 3 6 5 10 15 20 25 30 35 40 45 20 DAP 23 DAP 27 DAP 31 DAP 34 DAP 38 DAP DAYS AFTER PLANTING No./ 5 plants UTC - NYMPHS UTC - ADULTS

SLIDE 4

Fig. 2 Efficacy of Cruiser Rates and AVICTA Complete PAC

27.8 40.3 22 30.3 24.3 16.5 5 10 15 20 25 30 35 40 45 20 DAP 23 DAP 27 DAP 31 DAP 34 DAP 38 DAP DAYS AFTER PLANTING No./ 5 plants UTC CRUISER 0.3 CRUISER 0.34 AVICTA

SLIDE 5

Example 2) GreenSeeker NDVI

Improves plot data management

– 1) handheld – 2) mobile

SLIDE 6

0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 NDVI 38 DAP 48 DAP

Treatment

Non-treated Cruiser 5FS Gaucho Grande 5FS Temik 15G IFG

GreenSeeker NDVI Example – handheld at cottons pre-bloom stage

SLIDE 7

Use of NDVI To evaluate plots

SLIDE 8

SLIDE 9

Test - SJ08CT03a, on light soil with high nematodes

Geo-referenced tiers on

the Northeast Res. Sta.

.shp point data, 40 DAP

represents GreeenSeeker NDVI

Mobile mount, RTK GPS
Darker blue equal higher

NDVI due to Temik 15G sidedress treatments.

Back ground is Veris eca

SLIDE 10

Other considerations for the use of seed treatments

Implications for resistance in other pests

– mites, aphids and plant bugs

Pest status

– expect changes in species due shifts in crop status on farms

Management recommendations

– plan for soil type variability and nematode pest status

SLIDE 11

1327 1642 1211 1140 1225 1227

500 1000 1500 2000 T + ACP ACP 80 lbs N 115 lbs N 135 lbs N

SLIDE 12

900 950 1000 1050 1100 1150 1200 1250 Seed Treatment X N Rate 70 90 120 150 170

Effect DF F Value Pr > F N_rate 6 16.8 <.0001 Ec_zone 2 152.83 <.0001 N_rate*ec_Zone 12 1.24 <.0001 LSU Analysis - McCarter

SLIDE 13

Seeding pests