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Are many little hammers effective? Velvetleaf (Abutilon theophrasti) population dynamics in two- and four-year crop rotation systems

  • Paula R. Westerman, Matt Liebman (a1), Fabián D. Menalled (a2), Andrew H. Heggenstaller (a3), Robert G. Hartzler (a4) and Philip M. Dixon (a5)...

To improve understanding of relationships between crop diversity, weed management practices, and weed population dynamics, we used data from a field experiment and matrix models to examine how contrasting crop rotations affect velvetleaf. We compared a 2-yr rotation system (corn–soybean) managed with conventional rates of herbicides with a 4-yr rotation (corn–soybean–triticale + alfalfa–alfalfa) that received 82% less herbicide. In November 2002, a pulse of velvetleaf seeds (500 seeds m−2) was added to 7- by 7-m areas within replicate plots of each crop phase–rotation system combination. Velvetleaf seed, seedling, and reproductive adult population densities, seed production, and seed losses to predators were measured during the next year. Velvetleaf seed production was greater in the 4-yr rotation than in the 2-yr rotation (460 vs. 16 seeds m−2). Averaged over 12 sampling periods from late May to mid-November 2003, loss of velvetleaf seeds to predators also was greater in the 4-yr rotation than in the 2-yr rotation (32 vs. 17% per 2 d). Modeling analyses indicated that velvetleaf density in the 4-yr rotation should decline if cumulative losses of seeds produced in the soybean phase exceeded 40%. Achieving such a level of predation appears possible, given the observed rates of velvetleaf seed predation. In addition, no tillage occurs in the 4-yr rotation for 26 mo after soybean harvest, thus favoring seed exposure on the soil surface to predators. Models that included estimates of seed predation indicated that to prevent increases in velvetleaf density, weed control efficacy in soybean must be ≥ 93% in the 2-yr rotation, but could drop to 86% in the 4-yr rotation. These results support the hypothesis that diverse rotations that exploit multiple stress and mortality factors, including weed seed predation, can contribute to effective weed suppression with less reliance on herbicides.

Corresponding author
Corresponding author. Department of Agronomy, 2501 Agronomy Hall, Iowa State University, Ames, IA 50011-1010;
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W. S. Abbott 1945. A method of computing the effectiveness of an insecticide. J. Econ. Entomol 18:265267.

S. Benvenuti , M. Macchia , and S. Miele 2001. Quantitative analysis of emergence of seedlings from buried weed seed with increasing soil depth. Weed Sci 49:528535.

G. E. Brust and G. J. House 1988. Weed seed destruction by arthropods and rodents in low-input soybean agroecosystems. Am. J. Altern. Agric 3:1925.

D. D. Buhler , J. D. Doll , R. T. Proost , and M. R. Visocky 1994. Interrow cultivation to reduce herbicide use in corn following alfalfa without tillage. Agron. J 86:6672.

D. D. Buhler and R. G. Hartzler 2001. Emergence and persistence of seed of velvetleaf, common waterhemp, woolly cupgrass, and giant foxtail. Weed Sci 49:230235.

A. J. Bussan , C. M. Boerboom , and D. E. Stoltenberg 2001. Response of velvetleaf demographic processes to herbicide rate. Weed Sci 49:2230.

H. Caswell 2001. Matrix Population Models: Construction, Analysis, and Interpretation. 2nd ed. Sunderland, MA: Sinauer Associates.

H. Caswell and M. C. Trevisan 1994. Sensitivity analysis of periodic matrix models. Ecology 75:12991303.

R. Cousens and S. R. Moss 1990. A model of the effects of cultivation on the vertical distribution of weed seeds within the soil. Weed Res 30:6170.

A. S. Davis , P. M. Dixon , and M. Liebman 2003. Cropping system effects on giant foxtail (Setaria faberi) demography. 2. Retrospective perturbation analysis. Weed Sci 51:930939.

A. S. Davis , P. M. Dixon , and M. Liebman 2004. Using matrix models to determine cropping system effects on annual weed demography. Ecol. Appl 14:655668.

A. S. Davis and M. Liebman 2003. Cropping system effects on giant foxtail (Setaria faberi) demography. 1. Green manure and tillage timing. Weed Sci 51:919929.

P. Dowling and P. Wong 1993. Influence of preseason weed management and in-crop treatments on two successive wheat crops. 1. Weed seedling numbers and wheat grain yield. Aust. J. Exp. Agric 33:167172.

J. L. Gonzalez-Andular 1997. A matrix model for the population dynamics and vertical distribution of weed seedbanks. Ecol. Model 97:117120.

S. K. Harrison , E. E. Regnier , and J. T. Schmoll 2003. Postdispersal predation of giant ragweed (Ambrosia trifida) seed in no-tillage corn. Weed Sci 51:955964.

N. Jordan , D. A. Mortensen , D. M. Prenslow , and K. C. Cox 1995. Simulation analysis of crop rotation effects on weed seedbanks. Am. J. Bot 82:390398.

R. J. Kremer 1993. Management of weed seed banks with microorganisms. Ecol. Appl 3:4252.

M. Liebman and E. R. Gallandt 1997. Many little hammers: ecological management of crop-weed interactions. Pages 291343 in L. E. Jackson ed. Ecology in Agriculture. San Diego, CA: Academic.

M. Liebman and C. P. Staver 2001. Crop diversification for weed management. Pages 322374 in M. Liebman , C. L. Mohler , and C. P. Staver eds. Ecological Management of Agricultural Weeds. Cambridge, U.K.: Cambridge University Press.

S. K. Mertens , F. van den Bosch , and J. A. P. Heesterbeek 2002. Weed populations and crop rotations: exploring dynamics of a structured system. Ecol. Appl 12:11251141.

C. L. Mohler 2001. Weed life history: identifying vulnerabilities. Pages 4098 in M. Liebman , C. L. Mohler , and C. P. Staver eds. Ecological Management of Agricultural Weeds. Cambridge, U.K.: Cambridge University Press.

C. L. Mohler and A. E. Galford 1997. Weed seedling emergence and seed survival: separating the effects of seed position and soil modification by tillage. Weed Res 37:147155.

R. F. Norris 1999. Ecological implications of using thresholds for weed management. J. Crop. Prot 2:3158.

J. T. O'Donovan 1996. Weed economic thresholds: useful agronomic tool or pipe dream? Phytoprotection 77:1328.

H. A. Roberts and P. M. Feast 1972. Fate of seeds of some annual weeds in different depths of cultivated and undisturbed soil. Weed Res 12:316324.

M. C. Vavrek , J. B. McGraw , and H. S. Yang 1997. Within-population variation in demography of Taraxacum officinale: season- and size-dependent survival, growth and reproduction. J. Ecol 85:277287.

P. R. Westerman , J. S. Wes , M. J. Kropff , and W. van der Werf 2003. Annual losses of weed seeds due to predation in organic cereal fields. J. Appl. Ecol 40:824836.

G. Zanin and M. Sattin 1988. Threshold level and seed production of velvetleaf (Abutilon theophrasti Medicus) in maize. Weed Res 28:347352.

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Weed Science
  • ISSN: 0043-1745
  • EISSN: 1550-2759
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