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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Biological control effects of Tyria Jacobaeae on the population dynamics of Senecio Jacobaea in Northwest Montana/

Crider, Kimberly Kay. January 2010 (has links)
Thesis (PHD)--University of Montana, 2010. / Contents viewed on April 9, 2010. Title from author supplied metadata. Includes bibliographical references.
32

The invasion potential and competitive ability of Camelina sativa (L.) Crantz (camelina) in rangeland ecosystems

Davis, Philip Browning. January 2010 (has links) (PDF)
Thesis (MS)--Montana State University--Bozeman, 2010. / Typescript. Chairperson, Graduate Committee: Fabian D. Menalled. Includes bibliographical references (leaves 82-96).
33

The biology and control of some turf weeds.

Ho, Lee San January 1964 (has links)
This study of some common turf weeds of the Vancouver area considers some aspects of biology and control. Seed production observations indicated that seeds ranging from 300 to over 260,000 per plant were produced each season by different species. Seeds of Senecio vulgaris L., Sonchus oleraceus L. and Hypochaeris radicata L. germinated immediately after harvest while others required several months. H. radicata showed good germination in light while Cerastium vulgatum L. and Lamium amplexicaule L. germinated best in a shaded or dark environment. Two germination peaks in spring and fall occur in this group of turf weeds. However Stellaria media (L.) Cyrill produced flowers and seed for most of the year. Rumex acetosella L. also had a long flowering period as did Plantago lanceolata L. and P. major L. The three latter species were found to require a long time to mature in the flower head and so were not shedding seed over the considerable period of time characteristic of S. media. Leaf area development did not appear to be associated with root development in the seedling weeds examined, and variations in the relative leaf areas of the different species occurred with time. Marked differences in flowering period and characteristics were apparent in observations on the various weeds made over a 17 month period. Apomictic seeds of Taraxacum officinale L. were found to have a germination rate significantly lower than those produced by artificial pollination. Inhibitory materials present in leaves and stems of weeds were shown to delay germination of bent grass nearly three weeks and to definitely reduce the percentage germination. The species showing the greatest inhibitory properties were Matricaria matricarioides (Less.) Porter, S. media and P. lanceolata in that order. Four turf grasses were shown to differ in their responses to proprietory mixtures of the phenoxy type herbicides, and weed species similarly differed in their responses to the newer herbicides which included Banvel D (dicamba), Tordon, phenoxypropionic materials and mixtures containing two and three chemicals. / Land and Food Systems, Faculty of / Graduate
34

Vegetation in Kansas pastures and the relation of organic food reserves of some pasture weeds to the effectiveness of their eradication

Grandfield, Clarence Owen. January 1929 (has links)
Call number: LD2668 .T4 1929 G71
35

The effect of some chemical weed killers on certain weedy grasses

Finnerty, Deane Ward. January 1949 (has links)
Call number: LD2668 .T4 1949 F51 / Master of Science
36

The effect of pre-emergent treatments with 2, 4-dichlorophenoxyacetic acid on weeds in certain crops

Hamilton, Roger Dale. January 1949 (has links)
Call number: LD2668 .T4 1949 H32 / Master of Science
37

EFFECT OF DALAPON ON PYRAZON ACTIVITY IN TWO PLANT SPECIES

Belles, Wayne Stuart, 1937- January 1970 (has links)
No description available.
38

Weeds of Crops in Southern Arizona

Hamilton, K. C., Arle, H. F. 05 1900 (has links)
No description available.
39

Root architecture in relation to avoidance of Striga hermonthica infection

Delft, Gert-Jan van January 1997 (has links)
No description available.
40

Biology of the grass weed Rottboellia cochinchinensis and the potential for its biological control using the head smut Sporisorium ophiuri

Reeder, Robert H. January 1999 (has links)
No description available.

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