BEDSTRAW, GOOSEGRASS, CLEAVERS, GALIUM APARINE, GALIUM SPP.

Catchweed bedstraw and wild mustard each produce two populations per year: a winter population (WP) in June, and a summer population (SP) in September. Experiments were conducted to determine whether the WP and SP differ in seed mass and seasonal germination. Seeds of both weeds were buried at 0, 5, 10, and 20 cm in cultivated fields, and retrieved at monthly intervals for 24 mo for germination tests in the laboratory. Additionally, seedling emergence from seeds buried at 0, 5, and 10 cm in the field was evaluated for 1 yr. Seeds from the WP were heavier than those from the SP for both species. Germination of exhumed seeds was affected by burial depth and by seed population. It was highest for seeds that remained on the soil surface and declined with increasing depth of burial. The WP of catchweed bedstraw produced two germination peaks per year, whereas the SP and all populations of wild mustard had only one peak. The WP of both weeds germinated earlier than the SP. Seedling emergence for both species in the field was greater for the WP than for the SP. Increasing soil depth reduced seedling emergence of both the WP and SP of wild mustard and affected only the WP of catchweed bedstraw. We conclude that the WP and SP of catchweed bedstraw and wild mustard seeds used in this study differed in seed mass, seasonal germination, and seedling emergence. The ability of a WP to produce large seeds that germinate early and have two germination peaks per year could make these populations a serious problem in cropping systems.

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Unusual trichome structure and composition in mericarps of catchweed bedstraw (Galium aparine)

PROTOPLASMA ◽

10.1007/s00709-008-0008-5 ◽

2008 ◽

Vol 233 (3-4) ◽

pp. 275-275

Author(s):

Andrew J. Bowling ◽

H. Brian Maxwell ◽

Kevin C. Vaughn

Keyword(s):

Galium Aparine

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The influence of fire on Spartina pectinata wetland communities in a northeastern Kansas tallgrass prairie

Canadian Journal of Botany ◽

10.1139/b95-011 ◽

1995 ◽

Vol 73 (1) ◽

pp. 84-90 ◽

Cited By ~ 15

Author(s):

Stephen R. Johnson ◽

Alan K. Knapp

Keyword(s):

Tallgrass Prairie ◽

Light Availability ◽

Fire Frequency ◽

Plant Species Composition ◽

Prairie Wetlands ◽

Asclepias Syriaca ◽

Spartina Pectinata ◽

Galium Aparine ◽

Reduced Light ◽

Diverse Plant

Wetlands dominated by the C4 grass Spartina pectinata were investigated to quantify differences in plant species composition and diversity in response to fire frequency. The study site was a tallgrass prairie in northeastern Kansas that included Spartina wetlands subjected to spring fires at 1-, 2-, 4-, 10-, and 20-year intervals. Because C3 forbs in these wetlands responded strongly to different fire frequencies, the light environment and gas exchange responses of the ubiquitous forb Asclepias syriaca were also assessed. In general, species diversity was lower in annually burned wetlands because of lower forb diversity. Maximum H′ in annually burned sites was 1.64 versus 2.77 in 10- and 20-year burned sites. However, individual forb responses varied. Asclepias increased and Solidago canadensis and Galium aparine decreased in importance with increasing fire frequency. Canopy sunlight interception was greater in annually burned wetlands than in wetlands with lower burn frequencies. Despite reduced light availability, midseason photosynthetic rates of Asclepias were higher in annually burned sites. The results suggest that frequent fire in tallgrass prairie wetlands results in less diverse plant communities, similar to responses of upland prairie, and that the timing of fire, relative to life history and phenology of the subordinate species, strongly influences responses of individual forbs. Key words: wetlands, tallgrass prairie, Spartina pectinata communities, fire.

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First Report of Powdery Mildew Caused by Golovinomyces orontii on Galium aparine in China

Plant Disease ◽

10.1094/pdis-06-16-0914-pdn ◽

2017 ◽

Vol 101 (1) ◽

pp. 251-251 ◽

Cited By ~ 1

Author(s):

D. L. Pei ◽

X. Q. Zhu ◽

Y. Y. Xu ◽

C. W. Li

Keyword(s):

Powdery Mildew ◽

First Report ◽

Golovinomyces Orontii ◽

Galium Aparine

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Možnosti zatiranja izbranih plevelnih vrst v Evropi z žuželkami

Acta agriculturae Slovenica ◽

10.14720/aas.2020.115.2.1439 ◽

2020 ◽

Vol 115 (2) ◽

pp. 389

Author(s):

Sergeja ADAMIČ ◽

Stanislav TRDAN

Keyword(s):

Weed Control ◽

Ambrosia Artemisiifolia ◽

Cirsium Arvense ◽

Convolvulus Arvensis ◽

Rumex Crispus ◽

Polygonum Aviculare ◽

Galium Aparine ◽

Field Bindweed ◽

Ophraella Communa ◽

Tyta Luctuosa

Weed control by insects is increasingly important, as chemical weed control (the use of herbicides) has an important impact on the environment and, consequently, on all organisms living there. The use of insects to control weeds thus represents an alternative to herbicides. The article presents the suppression of some widespread and persistent weeds in Europe with their natural enemies - insects. The following combinations presented below are: broad-leaved dock (Rumex obtusifolius L.) – Gastrophysa viridula (De Geer, 1775), curly dock (Rumex crispus L.) – Apion violaceum (Kirby, 1808), common ragweed (Ambrosia artemisiifolia L.) – Ophraella communa (LeSage, 1986) and Zygogramma suturalis (Fabricius, 1775), creeping thistle (Cirsium arvense (L.) Scop.) – Cassida rubiginosa (Müller, 1776), cleavers (Galium aparine L.) – Halidamia affinis (Fallen, 1807) and Sermylassa halensis (Linnaeus, 1767), common knotgrass (Polygonum aviculare L.) and black-bindweed (Fallopia convolvulus L.) – Gastrophysa polygoni (Linnaeus, 1758) and as the last one field bindweed (Convolvulus arvensis L.) – Galeruca rufa (Germar, 1824) and Tyta luctuosa (Denis in Schiffmuller, 1775).

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