Interaction Between<i>Colletotrichum coccodes</i>and Thidiazuron for Control of Velvetleaf (<i>Abutilon theophrasti</i>)

Wymore, L. A.; Gotlieb, A. R.

doi:10.1017/s0043174500053856

Cited by 53 publications

(33 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…using the herbicide thidazuron in combination with Colletotrichum coccodes (Wallr). Hughes was noticeably less effective in field trials (Wymore et al 1987;Wymore and Watson, 1989). Reduced efficacy may often be a result of lower biocontrol performance under less favourable field environments (Leger et al 2001;Netland et al 2001;Chandramohan et al 2002) and increased tolerance of plants (Hodgson et al 1988).…”

Section: Discussionmentioning

confidence: 99%

Effect of plant stage, Colletotrichum truncatum dose, and use of herbicide on control of Matricaria perforata

Graham¹,

Peng²,

Bailey³

et al. 2006

BioControl

View full text Add to dashboard Cite

Colletotrichum truncatum (Ct) was examined in a tank mix with the herbicide 2,4-D, clopyralid plus MCPA (Caurtail M Ò ), or metribuzin (Sencor Ò ) for control of scentless chamomile at 8-(younger) and 11-leaf stages (older) under controlled conditions. In initial trials, Ct at 7 Â 10 6 spores/ml (200 l/ha) reduced the fresh weight of scentless chamomile only slightly. However, its combinations with herbicides improved the efficacy variably depending on the herbicide used and stage of the weeds. Ct plus 2,4-D reduced the fresh weight by about 50% at both leaf stages of scentless chamomile when compared to untreated controls but no plants were killed. The fungus plus Curtail M consistently killed younger but not older plants, and the efficacy was substantially greater than that of the herbicide alone. The herbicide Sencor was highly effective on younger plants, and adding Ct did not achieve additional benefits. On older plants, however, Ct plus Sencor was substantially more effective than the herbicide alone, causing 76% fresh-weight reduction when compared to controls and killing 9 out of 16 older plants in four trials. Sencor applied alone reduced the fresh weight of older plants by 65%, but no plants were killed. Tested at doses ranging from 2 Â 10 6 to 20 Â 10 6 spores/ml, Ct plus Curtail M was most effective at the highest fungal inoculum dose, consistently killing younger but not older plants. In comparison, Ct at a medium dose (7 Â 10 6 spores/ml) plus Sencor killed the majority of older chamomile plants (7 out of 12), whereas the herbicide alone did not cause plant mortality. Further increasing fungal inoculum dose from this medium level did not enhance the weed control by Ct plus Sencor.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of plant stage, Colletotrichum truncatum dose, and use of herbicide on control of Matricaria perforata

Graham¹,

Peng²,

Bailey³

et al. 2006

BioControl

View full text Add to dashboard Cite

show abstract

“…This area has been reviewed by Altman et al (1990), Christy et al (1993), Greaves and Sargent (1986), Hoagland (1996), and Lévesque and Rahe (1992). In many cases, positive interactions exist between bioherbicides and chemical herbicides (Léger et al 2001;Smith and Hallett 2003;Wymore et al 1987), and where the mechanism has been investigated, it has been shown that the chemical herbicide has predisposed the plant to attack by the plant pathogens (Sharon et al 1992). The most thoroughly characterized systems show that sublethal doses of glyphosate can inhibit the plant's ability to produce phytoalexins (Lévesque and Rahe 1992;Sharon et al 1992).…”

Section: Weeds Of Agronomic/horticultural Cropsmentioning

confidence: 99%

Where are the bioherbicides?

Hallett

2005

Weed Science

View full text Add to dashboard Cite

Since commercialization of Collego™ and Devine™ in the early 1980s, there has been a small but consistent research effort in the area of bioherbicides. The bioherbicide approach has promised effective weed management in cropping systems where the classical approach (using exotic natural enemies) is largely unsuitable. The overriding principle of the bioherbicide approach has been that a host-specific, coevolved natural enemy can be used as a bioherbicide when applied in simple formulations at inundative levels; however, two decades of research has effectively disproven this principle. Although research has revealed weaknesses in the bioherbicide approach, it has also revealed potential in a number of areas. A number of niche situations will remain in which host-specific plant pathogens can be developed as bioherbicides, such as for parasitic weeds and narcotic plants, but more research should be conducted with virulent, broad host range organisms, and more effort should be devoted to developing techniques for the cultural and genetic enhancement of bioherbicidal organisms.

show abstract

“…Sorsa et al (1988) also reported synergistic interactions between the herbicide endothall and the fungal pathogen Colletotrichum gloeosporioides against Eurasian watermilfoil. Moreover, many positive interactions between chemical herbicides and bioherbicides have been demonstrated in terrestrial plants (Hoagland 1996;Léger et al 2001;Smith and Hallet 2006;Wymore et al 1987).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Triclopyr andMycoleptodiscus terrestrisfor Control of Eurasian Watermilfoil (Myriophyllum spicatum)

Nelson

Shearer

2008

Invasive plant sci. manag.

View full text Add to dashboard Cite

Growth chamber studies were conducted using 55-L aquariums to evaluate the efficacy of the herbicide triclopyr and the fungal pathogenMycoleptodiscus terrestris, applied alone and in combination against Eurasian watermilfoil. Treatments included 0.15, 0.40, and 1.50 mg acid equivalent (ae)/L triclopyr, 0.08, 0.16, and 0.32 ml/LM. terrestris, combinations of both agents at all rates, and an untreated control. Plants were exposed to all treatments for a 24-h contact time and plant biomass (shoot and roots) was recorded 6 wk after application. For both triclopyr andM. terrestrisapplied alone, plant control increased with treatment concentration. Compared with untreated plants, 1.50 mg/L triclopyr and 0.32 ml/LM. terrestrisreduced Eurasian watermilfoil by 100 and 91%, respectively. Lower doses of herbicide or pathogen were less effective and plant recovery was observed from surviving plant tissues (stems and root crowns). AlthoughM. terrestrisat 0.08 ml/L did not significantly reduce shoot or root biomass and 0.15 mg/L triclopyr provided only 53% control of plants, combining both agents at these rates reduced Eurasian watermilfoil by 90%. Results demonstrated that integrating low doses of triclopyr with an indigenous pathogen,M. terrestris, can improve control of Eurasian watermilfoil. Lower use rates of triclopyr would minimize impacts to sensitive nontarget vegetation, reduce application costs, and may minimize impacts of label-imposed use restrictions.

show abstract

Interaction BetweenColletotrichum coccodesand Thidiazuron for Control of Velvetleaf (Abutilon theophrasti)

Cited by 53 publications

References 6 publications

Effect of plant stage, Colletotrichum truncatum dose, and use of herbicide on control of Matricaria perforata

Effect of plant stage, Colletotrichum truncatum dose, and use of herbicide on control of Matricaria perforata

Where are the bioherbicides?

Evaluation of Triclopyr andMycoleptodiscus terrestrisfor Control of Eurasian Watermilfoil (Myriophyllum spicatum)

Contact Info

Product

Resources

About