Tall Morningglory Germination Response to Herbicides and Temperature

Cole, A. W.; Coats, G. Euel

doi:10.1017/s0043174500027454

Cited by 19 publications

(17 citation statements)

References 8 publications

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“…At temperatures below 20/12.5, germination was , 10%, whereas at temperatures above 35/25 C the germination was # 20%. The optimum germination occurred between 20/12.5 and 35/25 C. These results were similar to those obtained by Cole and Coats (1973). They observed that germination of tall morningglory occurred from temperatures of 15 to 30 C, with lower germination at $ 35 C. Similarly, germination of other morningglory species, such as Ipomoea hederacea Jacq.…”

Section: Resultssupporting

confidence: 85%

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

et al. 2012

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Tall morningglory is an annual broadleaf vine and a problem weed in many annual and perennial crops in several countries including the United States. A better understanding of the germination biology of tall morningglory would facilitate the development of better control strategies for this weed. Experiments were conducted under greenhouse and laboratory conditions to evaluate the effects of various environmental factors, such as temperature, light, planting depth, pH, osmotic and salt stress, and flooding duration, on the germination of tall morningglory. The results suggested that the optimum day/night temperature range for the germination of tall morningglory was 20/12.5 to 35/25 C and maximum germination (89%) was observed at 30/20 C. Temperature higher and lower than the optimum range significantly reduced germination. Alternate light and dark did not have any adverse effect on the germination of tall morningglory seeds. The germination was 10% at an osmotic stress of −0.3 and −0.4 MPa, and above that, no germination was observed. Tall morningglory showed some tolerance to salt stress. The germination was 40% and 12% at salt concentrations of 50 mM and 200 mM, respectively. Germination was affected by pH levels, and maximum germination occurred at pH 6, whereas above or below that level, germination was significantly reduced. Maximum germination of seeds was 83 and 94% when sown at 0 and 2 cm depth in soil, within a week of sowing; however, germination was significantly reduced to 76% when placed at a depth of 4 cm or deeper. Under no flooding treatment, 87% of seed germinated, but flooding delayed and inhibited the germination of tall morningglory seeds. It is concluded that several environmental factors affected the germination of tall morningglory, and this information could help to predict the spread of tall morningglory in new areas such as Florida.

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Section: Resultssupporting

confidence: 85%

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

et al. 2012

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“…Temperatures at which I. hederifolia germinated in greater amount (%) and in a quicker way (IGS) were concentrated in the interval between 23.7 and 30.2ºC for seeds without chemical treatment and between 21.6 and 35ºC for seeds scarified (TABLE 2). Similar results were found by Cole and Coats (1973) for I. purpurea. These authors observed optimal germination between 20 and 30ºC, besides reduction on germination speed and on dry matter transference from cotyledon to root/ hypocotyl when temperatures were below 20ºC.…”

Section: Resultssupporting

confidence: 89%

Germination of five weed species of Convolvulaceae family under the effect of temperature

Labonia

Presoto

Andrade

et al. 2019

R. Agrogeoambiental

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Seeds of several weed species have distinct development when germinating under different conditions of temperature, promoting variation on the management system. Thus, this work was carried out with the objective of evaluating the influence of temperature on the germination of five weed species of Convolvulaceae family, commonly known as morning glory. The work was performed in termogradient table and constituted by five independent experiments, divided by species, in a factorial combination of nine treatments (temperatures) and two seed dormancy breaking conditions (with or without acid scarification). The weed species were: Ipomoea triloba, I. hederifolia, I. quamoclit, I. nil and Merremia cissoides. Nine temperature intervals between 15 and 35ºC were evaluated, under 8 hours of daily photoperiod. Experimental design adopted was totally randomized with four replicates. Percentage of germination was evaluated daily; the speed of germination index was calculated for the species. Generally, it was evident that temperatures lower than 17,2 ºC reduced significantly germination of all species, inhibiting germination of I. quamoclit. Species demonstrated capacity of germinating on temperatures from 20ºC to 35ºC. Acid scarification of seeds with sulfuric acid was able of increasing significantly the percentage of seed germination.

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“…Germination rates of OWCF spores with metsulfuron were less than 0.5% at 0.1 g ai L 21 and 0.0% at higher concentrations, whereas germination rates of OWCF spores exposed to imazapyr, also an ALS inhibitor, were 19% with highest rate (24 g ai L 21 ) tested. Different responses of tall morningglory [Ipomoea purpurea (L.) Roth] germination rates with herbicides of similar chemical structures have been reported (Cole and Coats 1973). These differences between the germination rates of OWCF with two ALS-inhibiting herbicides may also be due to differences in the inert ingredients associated with the metsulfuron-containing product used (Escort XP) that allow metsulfuron to permeate the cell wall.…”

Section: Resultsmentioning

confidence: 99%

Tolerance of Old World Climbing Fern (Lygodium microphyllum) Spores to Herbicides

Hutchinson¹,

Langeland²

2011

Invasive plant sci. manag.

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Old World climbing fern (OWCF) is a highly invasive fern that disrupts natural communities in central and southern Florida. OCWF produces copious, wind-blown spores that have propelled its rapid invasion of Florida's natural areas over the last few decades. Current management of OWCF is limited to herbicides and natural resource managers in Florida have questioned if herbicides inhibit spore germination. This study compared spore germination rates of OWCF exposed to six herbicides and a surfactant from 1 to 24 h under laboratory conditions. Spores of OWCF were highly susceptible to metsulfuron, but exhibited tolerance to imazapyr, glyphosate, fluroxypyr, asulam, and triclopyr. Spore germination rates were 0.4% for spores exposed to 0.1 g ai L−1 of metsulfuron, but 0% for rates greater than or equal to 0.2 g ai L−1 at 30 d after treatment (DAT). Reduction in spore germination was observed with all other concentrations of herbicides tested, ranging from 10.4% with triclopyr (40 g ai L−1) to 42.6% with asulam (4.2 g ai L−1) compared to 47.9% germination for untreated checks 30 DAT. Spores were highly sensitive to metsulfuron with herbicide concentrations required for 50 and 95% inhibition of spore germination (I50 and I95) measuring 0.014 and 0.063 g ai L−1, respectively; spores were greater than 1,000-fold more sensitive to metsulfuron compared to I95 concentrations of any other herbicide tested. These results indicate that metsulfuron exhibits potential to control OWCF spore germination but spores are tolerant to the five other herbicides tested.

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Tall Morningglory Germination Response to Herbicides and Temperature

Cited by 19 publications

References 8 publications

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

Germination of five weed species of Convolvulaceae family under the effect of temperature

Tolerance of Old World Climbing Fern (Lygodium microphyllum) Spores to Herbicides

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