Managing weeds in sweet corn Callisto, varieties, and other concerns - PowerPoint PPT Presentation

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Managing weeds in sweet corn Callisto, varieties, and other concerns

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Managing weeds in sweet corn Callisto, varieties, and other concerns – PowerPoint PPT presentation

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Title: Managing weeds in sweet corn Callisto, varieties, and other concerns


1
Managing weeds in sweet corn-Callisto,
varieties, and other concerns-
  • Douglas Doohan and Joel Felix
  • OSU / OARDC, Wooster

2
  • Managing weeds with Callisto
  • How varieties respond to Callisto
  • Carryover issues

3
Herbicides for Sweet Corn
  • Herbicide resistant grasses weeds
  • Few products regt
  • OH C. thistle major problem
  • No controls

4
Herbicides for Sweet Corn
  • Callisto
  • 22 species PRE
  • 31 species POST
  • ½ pt atrazine POST 39 species

5
Herbicides for Sweet Corn
  • Callisto
  • 22 species PRE
  • 31 species POST
  • ½ pt atrazine POST 39 species
  • 29 species with Accent

6
Herbicides for Sweet Corn
  • Callisto
  • 6 7.7 oz/a PRE

7
Herbicides for Sweet Corn
  • Callisto
  • 6-7.7 oz PRE
  • 5-6 oz atrazine

8
Herbicides for Sweet Corn
  • Callisto
  • 6-7.7 oz PRE
  • 5-6 oz atrazine
  • 3 oz POST

9
Herbicides for Sweet Corn
  • Callisto
  • 6-7.7 oz PRE
  • 5-6 oz atrazine
  • 3 oz POST
  • With / wo atrazine

10
Herbicides for Sweet Corn
  • Callisto PRE vs POST
  • Crop tolerance
  • Cost

11
Herbicides for Sweet Corn
  • Callisto POST
  • Adjuvants
  • Timing
  • Carryover

12
Crop Tolerance - Adjuvant Effect
Rate 3 oz/ A
13
Callisto crop tolerance - adjuvants
14
Effect of Adjuvant
3 oz NIS
3 oz NIS UAN
15
Effect of Adjuvant
Rate 3 oz/ A
16
Effect of Adjuvant
Untreated
3 oz COC UAN
17
Effect of Adjuvant
3 oz NIS
3 oz AMS
18
Effect of Adjuvant
3 oz COC UAN
3 oz COC
19
Effect of Rate Timing (POST)
Adjuvant Sys. COC 1 UAN 2.5
20
Effect of Rate Timing (PRE)
21
Callisto variety tolerance 02/03
22
Callisto variety tolerance 02/03
23
Callisto variety tolerance 02/03
24
Callisto variety tolerance 02/03
25
Callisto variety tolerance 02/03
26
Callisto variety tolerance 03
27
Callisto variety tolerance 03
28
Permit variety tolerance 03
29
Rotational Crop Issues
  • Vegetable producers rent much of their land.
  • Crop injury from soil residues of agronomic
    herbicides is a recurrent problem.

30
Callisto carryover effects
31
Callisto carryover effects
32
Callisto carryover effects
33
Callisto carryover effects
34
Results Discussion
  • No varietal interactions
  • Fremont
  • Rapid onset of injury
  • More severe
  • Snap bean and
  • cucumber yield effect
  • Wooster
  • Delayed injury
  • Less severe
  • No yield effect

35
Callisto Carryover Symptoms
Sweetclover Snapbeans
36
Callisto Carryover Symptoms
37
Clover Response to Callisto Soil Residues
38
Snap Bean Response to Callisto Soil Residues
39
Cucumber Response to Callisto Soil Residues
40
Cabbage Response to Callisto Soil Residues
41
Pepper Response to Callisto Soil Residues
42
Tomato Response to Callisto Soil Residues
43
Summary
  • Callisto did not affect yield of rotational crops
    at Wooster
  • Snapbean Very sensitive to Callisto at Fremont
    but not at Wooster
  • Cucumber Yield reduction at Fremont following
    Callisto applied at 0.84 kg ai/ha

44
Summary
  • Cabbage, tomatoes, and bell peppers
  • Not harvested at Fremont
  • Little injury, no yield effect at Wooster
  • Sweet clover
  • Extremely sensitive at Fremont, much less so at
    Wooster

45
Significant site effect ?
  • Soils
  • Fremont higher OM, CEC and clay
  • 2003 Growing Conditions
  • Fremont excessive precipitation
  • Wooster moderate precipitation

46
(No Transcript)
47
Effect of Rate Timing
1.5 oz/a COC UAN
Untreated
48
Effect of Rate Timing
Untreated
3 oz/a COC UAN
6 oz/a COC UAN
1.5 oz/a COC UAN
49
Apple of Peru
  • Is apple of Peru the next weed to worry about or
    is it just another weed?

50
Pepper Field in 2003
51
Pepper Field in 2003
52
Pepper Field in 2003
53
Spray Miss in Soybeans
54
AOP plants in Roundup treated area
55
Car Foot Survey-plat map-
56
  • Ohio State
  • A compelling place to work

57
  • Veg Fruit Industy
  • Outstanding collaboration
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