Tall Morningglory Response to Planting Depth

Cole, A. W.

doi:10.1017/s0043174500066510

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…Germination beyond 7 DAS was limited to 8 and 3% germination at a 10-cm depth 14 DAS and at 0.5 cm depth 21 DAS, respectively (data not shown). These results were similar to the results obtained by Cole (1976) and Wilson and Cole (1966). Both studies reported that tall morningglory emergence was delayed and reduced as planting depths increased from 1.3 to 5.0 cm.…”

Section: Resultssupporting

confidence: 91%

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: 91%

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

et al. 2012

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“…Unlike our results, Cole (1976) observed that emergence of tall morningglory seedlings was delayed and Table 4. Student evaluation of the depth of emergence experiment and scientific paper assignment.…”

Section: Resultscontrasting

confidence: 99%

A Laboratory Exercise for Teaching Depth of Weed Emergence Concepts

Gibson

Liebman

2004

Weed technol.

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The influence of weed seed burial depth on seedling emergence is a common and important topic in undergraduate weed science courses. A laboratory exercise was developed at Iowa State University to actively demonstrate changes in weed seedling emergence with increased seed-burial depth. Twenty-five ivyleaf morningglory and wild mustard seeds were sown in pots in monoculture, and the number of emerging seedlings was counted for 3 wk. The results from two semesters were analyzed to determine whether the experiment was successful in meeting its intended outcomes. Assessment of student perceptions and attitudes indicated that the activity increased students' understanding of weed biology; improved students' critical thinking, reading, and writing skills; and improved students' ability to make scientific observations, interpret graphical information, and analyze and summarize research data.

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“…This is below the zone of the herbicide -treated soil in most instances. In addition, Cole (3) found that morningglory seedlings emerging from depths of 4 em or greater were delayed by as much as 4 weeks, compared to those emerging from a shallower depth. Soil-applied herbicides must have sufficient residual activity to control these lateemerging weeds.…”

Section: Introductionmentioning

confidence: 99%

Ivyleaf Morningglory (Ipomoea hederacea) Control with Herbicides in Soybeans (Glycine max)

Prosch

Kapuśta

1983

Weed sci.

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When trifluralin [α,α,α - trifluoro - 2,6 - dinitro -N,N-dipropyl-p-toluidine] was manually incorporated in small field plots to a depth of 10 cm, ivyleaf morningglory [Ipomoea hederacea(L.) Jacq.] was controlled more effectively than when incorporation was only 5 cm deep. No significant differences in ivyleaf morningglory control were observed between different incorporation depths when trifluralin was mechanically incorporated in large field plots. Ivyleaf morningglory emerging from 10 cm deep was controlled to a greater degree than that emerging from 5 cm deep. Preplant incorporated (PPI) trifluralin plus alachlor [2 - chloro – 2′, 6’ - diethyl -N- (methoxymethyl)acetanilide ] applied preemergence (PE) controlled up to 92% of the ivyleaf morningglory compared to 33 and 15% respectively, when these herbicides were applied alone at equal rates. This indicates a synergistic interaction between these two compounds. Trifluralin PPI plus RH 8817 [5-(2-chloro-4-trifluoromethyl phenoxy) - 2 - nitrobenzoic acid ethyl ester] and alachlor applied PE controlled ivyleaf morningglory more effectively (88 to 94%) than all other treatments. Soybean [Glycine max(L.) Merr.] injury and stand reduction were less than 5% in all studies.

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Tall Morningglory Response to Planting Depth

Cited by 12 publications

References 8 publications

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

A Laboratory Exercise for Teaching Depth of Weed Emergence Concepts

Ivyleaf Morningglory (Ipomoea hederacea) Control with Herbicides in Soybeans (Glycine max)

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