TITLE:
Effect of nematicide treatments on cotton yield at AG-CARES, Lamesa, TX, 2000.
AUTHORS:
Terry Wheeler, Danny Carmichael, Lionel Felts, Assistant Professor, Research Associate, Aventis CropScience
Planting date: 8 May
Variety: Paymaster 2326RR
Replications: 3
Plot size: four-rows wide, length ranged from 925 to 1694'
Plant mapping: 20 plants/plot on 11 July
Nematode sampling: 17 July
Location: 3rd and 4th spans in the conservation tillage (wheat-stubble) area.
Yield data was collected with a MicroTrak yield monitor on a four row stripper.
Treatments: 1 = Orthene 90S applied on 30 May, 3.2 oz/acre
2 = 3.5 lbs/a of Temik 15G applied at planting.
3 = 5 lbs/a of Temik 15G applied at planting.
4 = 5 lbs/a of Temik 15G applied at planting and two applications of Vydate (8.5 oz/acre/application) applied at pinhead size square (16 June) and one week later.
5 = 5 lbs/a of Temik 15G applied at planting + 5 lbs/a side dress at pinhead size square.
6 = 5 lbs/a of Temik 15G applied at planting + 7.5 lbs/a side dress applied at pinhead size square.
7 = 5 lbs/a of Temik 15G applied at planting + 7.5 lbs/a side dress applied at pinhead size square using a rolling cultivator applicator.
RESULTS AND DISCUSSION:
There was no advantage to using Temik 15G in 2000 with respect to any plant mapping characteristics, nematode density or yield.
|
Treatment |
lbs of lint/a |
PMa |
Height (in.) |
Nodes |
NAWFb |
Squares |
|
1 |
597 |
17,520 |
12.2 |
11.1 |
6.3 |
7.5 |
|
2 |
609 |
15,500 |
12.2 |
10.7 |
5.7 |
7.6 |
|
3 |
566 |
7,400 |
11.5 |
10.7 |
5.9 |
6.3 |
|
4 |
671 |
5,960 |
12.4 |
10.7 |
5.9 |
6.9 |
|
5 |
650 |
8,120 |
12.5 |
10.9 |
5.6 |
7.7 |
|
6 |
562 |
11,680 |
11.5 |
10.4 |
5.8 |
6.5 |
|
7 |
613 |
17,490 |
12.3 |
10.9 |
6.0 |
6.6 |
|
aPm is a root-knot nematode/pint of soil at midseason. b NAWF is the nodes above white flower. |
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