Notes
Slide Show
Outline
1
 
2
Introduction
  • Strawberries in Florida:
    • Second in harvested area in the U.S.


    • More than 2,600 ha (6,500 A).


    • Winter production.
3
Florida Vegetables
2001 Season
4
 
5
 
6
 
7
Preplant practices
8
 
9
Objective
  • Determine the effect of napropamide and oxyfluorfen on weed control on strawberry under different mulch types.
10
Materials and Methods
  • Two field trials at the GCREC-UF in Bradenton, Florida.


  • ‘Camarosa’ strawberry.


  • Pressed beds covered with plastic mulch.


  • Herbicides applied on bed tops and covered with mulch, one week before transplanting.


  • No fumigants applied.



11
Materials and Methods
  • Herbicides:
    • Non-treated control.
    • Napropamide: 4.50 kg·ha-1.
    • Napropamide: 6.75 kg·ha-1.
    • Napropamide: 9.00 kg·ha-1.
    • Oxyfluorfen: 0.57 kg·ha-1.
    • Napropamide + oxyfluorfen: 4.50 + 0.57 kg·ha-1.


  • Films:
    • Low density polyethylene mulch (LDP).
    • Virtually impermeable film (VIF).




12
Materials and Methods
  • Treatments factorially arranged.


  • Split-plot design with 5 replications.


  • Factors:
    • Herbicides: Main plots.


    • Mulch types: Subplots.
13
Materials and Methods
  • Variables:
    • Plant number at first harvest.


    • Plant vigor at 6 and 12 WAT (%).


    • Weed counts per species at 6, 10 and 16 WAT.


    • Fruit number and weight: 17 and 21 harvests per trial.



14
Materials and Methods
  • Strawberry plant number: Covariable.


  • Plant vigor: Transformed with arc sin-1.


  • Weed counts: Kruskal-Wallis test.


  • Yields: Data pooled; ANOVA at 5% significance.


  • LSD at 5% level.
15
 
16
 
17
 
18
 
19
 
20
 
21
 
22
 
23
 
24