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You searched for: Subject defoliation Remove constraint Subject: defoliation Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. Australian paperbark tree (Melaleuca)

Author:
Rayamajhi, M.B.; Purcell, M.F.; Van, T.K.; Center, T.D.; Pratt, P.D.; Buckingham, G.R.
Source:
Biological control of invasive plants in the eastern United States / technical coordinators: Roy Van Driesche ... [et al.] pp. -
Subject:
Melaleuca quinquenervia; Puccinia; plant taxonomy; insects; weed control; biological control agents; invasive species; ecological invasion; noxious weeds; economic impact; introduced plants; geographical distribution; host range; Oxyops vitiosa; defoliation; biodiversity; Neofusicoccum ribis; biological control; environmental impact; natural enemies; seed productivity; fungi; Australia; Florida
Handle:
10113/44390

2. Growth of bluegrass with various defoliations and abundant nitrogen supply

Author:
Graber, L.F.; Ream, H.W.
Source:
Agronomy journal 1931 v.23 no.11 pp. 938-944
ISSN:
0002-1962
Subject:
Poa pratensis; nitrogen fertilizers; defoliation; defoliants; container-grown plants
Abstract:
... The effect of partial defoliations and heavy nitrogenous fertilization was studied through the medium of pot cultures each containing one or two plants of bluegrass. Those defoliating treatments which reduced the organic reserves, curtailed the immediate and also the subsequent productivity of the plants on both fertilized and unfertilized cultures of bluegrass. Only when a productive level of res ...
DOI:
10.2134/agronj1931.00021962002300110008x

3. An indication that corn tillers may nourish the main stalk under some conditions

Author:
Dungan, G.H.
Source:
Agronomy journal 1931 v.23 no.8 pp. 662-670
ISSN:
0002-1962
Subject:
Zea mays; tillers; plant nutrition; crop yield; weight; defoliation; field experimentation
Abstract:
... Removing tillers from corn plants in the early milk stage caused a slight reduction in yield and test weight of grain, although the differences were not statistically significant. Comparison of the yield and test weight of grain from individual plants with suckers and those without suckers showed a very slight superiority for the plants with suckers, but here again no significance can be attached ...
DOI:
10.2134/agronj1931.00021962002300080007x

4. Competitive efficiency and productivity of bluegrass (Poa pratensis L.) with partial defoliations at two levels of cutting

Author:
Graber, L.F.
Source:
Agronomy journal 1933 v.25 no.5 pp. 328-333
ISSN:
0002-1962
Subject:
Poa pratensis; defoliation; weeds; rain; crop yield; weed control; nitrogen fertilizers; Wisconsin
Abstract:
... A much larger current production of oven-dried bluegrass was obtained with frequent and "close" defoliations than with "tall" defoliations at the same time and with the same frequency. The year following (1930), when productivity was measured by three uniform cuttings, the bluegrass which had been clipped closely in 1929 was less productive and weeds were 5 to 7 times more abundant. However, the i ...
DOI:
10.2134/agronj1933.00021962002500050003x

5. Defoliation experiments with kaoliang (Andropogan sorghum)

Author:
Li, H.W.; Liu, T.N.
Source:
Agronomy journal 1935 v.27 no.6 pp. 486-491
ISSN:
0002-1962
Subject:
Andropogon; defoliation; developmental stages; seeds; analysis of variance
Abstract:
... Kaoliang defoliation at the time when the plant reaches the dough stage results insignificant reductions both in yield and in kernel weight. Any defoliation done prior to this stage results in reduction both in yield and in kernel weight, the reduction being directly proportional to the earliness of defoliation. The method used in stripping off the leaves from the kaoliang plant by farmers, i. e., ...
DOI:
10.2134/agronj1935.00021962002700060010x

6. Effect of tillers on the development of grain sorghums

Author:
Bartel, A.T.; Martin, J.H.; Hawkins, R.S.
Source:
Agronomy journal 1935 v.27 no.9 pp. 707-714
ISSN:
0002-1962
Subject:
Sorghum (Poaceae); tillers; variety trials; defoliation; plant development; leaves
Abstract:
... Tillers and leaves of the main stalks of Dwarf hegari, a grain sorghum, were removed at various stages of plant development. Tillers increased the development of the main stalks of Dwarf hegari when the leaves of the latter were removed previous to heading, and the longer the tillers were left on the plant, the greater were the weights of the main stalk. When the leaves of the main stalk were remo ...
DOI:
10.2134/agronj1935.00021962002700090003x

7. Effect of defoliation upon the cold resistance of winter wheat

Author:
Suneson, C.A.; Peltier, G.L.
Source:
Agronomy journal 1936 v.28 no.10 pp. 807-809
ISSN:
0002-1962
Subject:
Avena sativa; defoliation; air temperature; mortality; cold tolerance; Nebraska
Abstract:
... Defoliation of field-grown winter wheat plants in the early tillering stage reduced cold resistance. The decrease in survival was approximately in proportion to the degree of defoliation, indicating the importance of photosynthesis during the hardening process. ...
DOI:
10.2134/agronj1936.00021962002800100004x

8. Differential feeding of grasshoppers on corn and sorghums

Author:
Brunson, A.M.; Painter, R.H.
Source:
Agronomy journal 1938 v.30 no.4 pp. 334-346
ISSN:
0002-1962
Subject:
variety trials; topcrossing; Zea mays; hybrids; varieties; crop damage; varietal resistance; provenance; Melanoplus differentialis; Sorghum bicolor; Melanoplus bivittatus; feeding behavior; defoliation; inbred lines; Kansas
Abstract:
... In the grasshopper outbreak of 1936 outstanding instances of differential injury among corn varieties, top crosses, and hybrids were noted. In one series of 52 hybrids, defoliation ranged from 40% to 59.8% as averages of five randomized replications. Extreme contrasts between grasshopper injury of corn and of sorghums were noted. In some cases corn in one field was eaten to the ground while sorghu ...
DOI:
10.2134/agronj1938.00021962003000040009x

9. Weak neck of sorghum

Author:
Hansing, E.D.; Melchers, L.E.; Bates, J.C.
Source:
Agronomy journal 1950 v.42 no.9 pp. 437-441
ISSN:
0002-1962
Subject:
cultivars; plant diseases and disorders; etiology; carbohydrate content; carbohydrates; drought; shade; defoliation; Sorghum (Poaceae)
Abstract:
... A study was made on the symptomatology and etiology of weak neck of sorghum. This is a physiologic or nonparasitic disease characterized by gradual disintegration of the tissues of the peduncles, which often break at or near their bases, and by poorly developed grain with absence of normal luster. Weak neck was induced by subjecting Colby plants to one or more drouth-stress periods, by artificial ...
DOI:
10.2134/agronj1950.00021962004200090005x

10. Chemical Defoliation of Cotton: VI. Defoliation as Effected by Chemical Applications to the Soil

Author:
Lamar C. Brown
Source:
Agronomy journal 1956 v.48 no.8 pp. 339-340
ISSN:
0002-1962
Subject:
cotton; defoliants; defoliation; irrigation water; soil
Abstract:
... SynopsisCotton defoliation was not effected when any of several defoliant-type chemicals were applied to the soil. Difficulties associated with the commercial aspects of applying defoliants in irrigation water are discussed. ...
DOI:
10.2134/agronj1956.00021962004800080001x

11. Tar Spot of Korean Lespedeza Caused by Phyllachora Sp.: Losses in Yield and Differential Susceptibility of Strains

Author:
C. H. Hanson; W. A. Cope; J. L. Allison
Source:
Agronomy journal 1956 v.48 no.8 pp. 369-370
ISSN:
0002-1962
Subject:
Lespedeza; Phyllachora; agronomy; defoliation; hay
Abstract:
... SynopsisAttention is called to the occurrence of tar spot on Korean lespedeza and to the need for its consideration in breeding programs. The 34 F₅ selections studied differed widely in reaction. The 6 lines in the most susceptible class suffered severe defoliation and premature ripening, and yielded only 30% as much seed as the 4 lines in the most resistant class. In this test the disease did not ...
DOI:
10.2134/agronj1956.00021962004800080010x

12. Chemical Defoliation of Cotton VII. Effectiveness of Adjuvants Under Several Specific Plant and Environmental Conditions

Author:
Lamar C. Brown
Source:
Agronomy journal 1957 v.49 no.10 pp. 563-566
ISSN:
0002-1962
Subject:
agronomy; cotton; defoliants; defoliation; leaf abscission; nitrogen
Abstract:
... SynopsisThe use of adjuvants with chemical defoliants increased the amount of leaf fall and rapidity of defoliation under limiting conditions such as wilted, toughened and inactive leaves, immature leaves and bolls, low temperatures, and conditions due to excessive applications of nitrogen. Under conditions considered favorable for defoliation, the use of adjuvants with chemical defoliants hastene ...
DOI:
10.2134/agronj1957.00021962004900100014x

13. Response of Soybeans to Leaf and Pod Removal

Author:
Dean F. McAlister; Orland A. Krober
Source:
Agronomy journal 1958 v.50 no.11 pp. 674-677
ISSN:
0002-1962
Subject:
defoliation; iodine value; leaves; lipid content; nitrogen; seed oils; seed weight; seed yield; seeds; soybeans; starch; stems; sugars
Abstract:
... SynopsisDefoliation caused reduction in all measures of yield. Severe, 8070, depodding reduced seed yield but increased weight per seed and stem yield. Moderate depodding, up to 40%, increased seed weight enough to maintain seed yield. Eighty percent depodding increased sugars, starch, and nitrogen in leaves and stems. Eighty percent defoliation increased the iodine number of seed oil, but decreas ...
DOI:
10.2134/agronj1958.00021962005000110010x

14. The Use of Pre-Harvest Sprays as an Aid in Field Drying Corn

Author:
Paul L. Crane
Source:
Agronomy journal 1958 v.50 no.1 pp. 35-36
ISSN:
0002-1962
Subject:
corn; defoliation; drying; endothal; hybrids; spraying
Abstract:
... SynopsisIn experiments conducted in 3 years, spraying nearly mature corn with endothal did not increase significantly the rate of moisture loss. Hand defoliation showed only temporary effects in 1955, whereas a small but statistically signifiant difference was indicated in 1956. No interaction was found between hybrids with inherently different rates of drying and treatments used. ...
DOI:
10.2134/agronj1958.00021962005000010010x

15. Influence of Nitrogen Fertilization and Clipping on Grass Roots

Author:
D. L. Oswalt; A. R. Bertrand; M. R. Teel
Source:
Soil Science Society of America journal 1959 v.23 no.3 pp. 228-230
ISSN:
0361-5995
Subject:
Bromus; Dactylis glomerata; defoliation; fertilizer application; grasses; leaves; nitrogen; nitrogen fertilizers; regrowth; rhizomes; rhizosphere; root growth; roots; sod plugs; soil water
Abstract:
... Strategic placement of P³² and root excavations revealed that roots of orchardgrass and bromegrass reached a greater depth when no N was applied. Nitrogen increased the root diameter and decreased the rate of elongation causing the plants to feed near the soil surface for a longer period of time. Defoliation stopped root growth within 24 hours and induced decomposition of the existing roots within ...
DOI:
10.2136/sssaj1959.03615995002300030022x

16. Leaf Removal in Grain Sorghum. I. Effects of Certain Defoliation Treatments on Yield and Components of Yield

Author:
F. C. Stickler; A. W. Pauli
Source:
Agronomy journal 1961 v.53 no.2 pp. 99-102
ISSN:
0002-1962
Subject:
agronomy; defoliation; flowering; grain sorghum; grain yield; leaf area; leaves; seed weight
Abstract:
... SynopsisA curvilinear relationship between grain yield and leaf area was found. Generally, changes in each of the 3 yield components were responsible for yield differences, although number of seeds per head and seed weight underwent greatest change. Greater yield reduction resulted from removing leaf area from upper than from lower portions of the plant. Likewise, removing alternate leaves was mor ...
DOI:
10.2134/agronj1961.00021962005300020011x

17. Leaf Removal in Grain Sorghum. II. Trends in Dry Matter, Carbohydrates, and Nitrogen Following Defoliation

Author:
A. W. Pauli; F. C. Stickler
Source:
Agronomy journal 1961 v.53 no.2 pp. 102-105
ISSN:
0002-1962
Subject:
agronomy; defoliation; flowering; grain sorghum; leaves; nitrogen
Abstract:
... SynopsisAccumulations of dry matter, total sugars, acid hydrolyzable carbohydrates, and nitrogen were reduced in plants and grain of Plainsman grain sorghum partially or completely defoliated at the boot or anthesis stage. ...
DOI:
10.2134/agronj1961.00021962005300020012x

18. Effect of Varying Leaf Area by Partial Defoliation and Plant Density on Dry Matter Production in Corn

Author:
Paul Hoyt; Richard Bradfield
Source:
Agronomy journal 1962 v.54 no.6 pp. 523-525
ISSN:
0002-1962
Subject:
agronomy; corn; defoliation; dry matter accumulation; leaf area; leaf area index; net assimilation rate; plant density
Abstract:
... SynopsisThe net assimilation rate of corn was linear to leaf area index when this was less than 2.7 but declined rapidly when it was above that value. In a stand with a leaf area index of 3.3, dry matter produced per square meter of leaf area from grain initiation to maturity by the top, middle, and bottom leaves was of the ratio 4:2.2:1. ...
DOI:
10.2134/agronj1962.00021962005400060017x

19. Growth Behavior and Management of Small Grains for Forage

Author:
Ethan C. Holt
Source:
Agronomy journal 1962 v.54 no.3 pp. 272-275
ISSN:
0002-1962
Subject:
agronomy; defoliation; forage; forage yield; plant development; temperature
Abstract:
... SynopsisSmall grain growth was positively related to average daily temperature. The immediate response to any degree of defoliation was a loss in dry weight of the crown. The recovery period was determined by the degree of defoliation. Frequent defoliation reduced plant development and forage yield while height of cutting influenced the distribution of harvested forage during the season but not te ...
DOI:
10.2134/agronj1962.00021962005400030027x

20. Influence of Clipping on Yield, Regrowth, and Root Development of Dallisgrass, Paspalum Dilatatum Poir., and Kleingrass, Panicum coloratum L.

Author:
Ethan C. Holt; Jerry C. McDaniel
Source:
Agronomy journal 1963 v.55 no.6 pp. 561-564
ISSN:
0002-1962
Subject:
Panicum coloratum; Paspalum dilatatum; agronomy; defoliation; forage; regrowth; spring; stubble
Abstract:
... SynopsisWeights of stubble, crown, and roots of dallisgrass decreased from spring to fall. Neither yield nor basal plant weight were greatly influenced by clipping treatments. The weight changes were interpreted as being an inherent characteristic rather than a response to specific management practices. Kleingrass appeared to be favored by the less intensive defoliation treatments. Treatments whic ...
DOI:
10.2134/agronj1963.00021962005500060018x