Effects of Johnsongrass (<i>Sorghum halepense</i>) Density on Sugarcane (<i>Saccharum officinarum</i>) Yield

Ali, A. D.; Reagan, T. E.; Kitchen, Lynn M.; Flynn, J. L.

doi:10.1017/s0043174500067023

Cited by 22 publications

(7 citation statements)

References 5 publications

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“…In addition, D. saccharalis infestations in experimental rice plots located within 1.25 km of noncrop sampling transects in Jackson County represented Ͼ99% of stem borer infestations in JulyÐAugust 2007 (Beuzelin 2011). In the Louisiana sugarcane agroecosystem, Bynum et al (1938) and Ali et al (1986) concluded that johnsongrass only played a minor role in D. saccharalis population build-up and overwintering. These observations suggest that noncrop hosts might contribute less to D. saccharalis populations than to E. loftini populations.…”

Section: Saccharalis Infestations In Noncrop Hostsmentioning

confidence: 99%

Seasonal Infestations of Two Stem Borers (Lepidoptera: Crambidae) in Noncrop Grasses of Gulf Coast Rice Agroecosystems

et al. 2011

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Infestations of two stem borers, Eoreuma loftini (Dyar) and Diatraea saccharalis (F.) (Lepidoptera: Crambidae), were compared in noncrop grasses adjacent to rice (Oryza sativa L.) fields. Three farms in the Texas rice Gulf Coast production area were surveyed every 6-8 wk between 2007 and 2009 using quadrat sampling along transects. Although D. saccharalis densities were relatively low, E. loftini average densities ranged from 0.3 to 5.7 immatures per m(2) throughout the 2-yr period. Early annual grasses including ryegrass, Lolium spp., and brome, Bromus spp., were infested during the spring, whereas the perennial johnsongrass, Sorghum halepense (L.) Pers., and Vasey's grass, Paspalum urvillei Steud., were infested throughout the year. Johnsongrass was the most prevalent host (41-78% relative abundance), but Vasey's grass (13-40% relative abundance) harbored as much as 62% of the recovered E. loftini immatures (during the winter). Young rice in newly planted fields did not host stem borers before June. April sampling in fallow rice fields showed that any available live grass material, volunteer rice or weed, can serve as a host during the spring. Our study suggests that noncrop grasses are year-round sources of E. loftini in Texas rice agroecosystems and may increase pest populations.

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Section: Saccharalis Infestations In Noncrop Hostsmentioning

confidence: 99%

Seasonal Infestations of Two Stem Borers (Lepidoptera: Crambidae) in Noncrop Grasses of Gulf Coast Rice Agroecosystems

et al. 2011

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“…Like many agronomic crops, sugarcane is most sus ceptible to weed interference during the early stages of the growing season (first 8 to 10 wk after emergence) (1,3). Under the Louisiana culture of sugarcane, this period occurs in the spring following a period of winter dormancy.…”

Section: Introductionmentioning

confidence: 99%

Johnsongrass (Sorghum halepense) Control in Sugarcane (Saccharumsp.) with Asulam Applied Alone and in Mixtures

Richard¹,

Griffin

1993

Weed technol.

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Asulam applied POST alone and in mixtures with residual herbicides and with DSMA and MSMA was evaluated for johnsongrass control. Johnsongrass control following treatment with asulam at 3.7 kg ai ha−1was not improved by tank mixtures with the residual herbicides atrazine, metribuzin, pendimethalin, and terbacil compared with asulam applied alone. Johnsongrass injury symptoms appeared sooner when asulam was applied in mixtures with either DSMA or MSMA, but johnsongrass control 4 wk after treatment was similar to asulam applied alone. As a result of the johnsongrass control obtained with early POST treatments of asulam applied alone, cane and sugar yields were increased by 56 and 58%, respectively, when compared with the weedy check. Additional cane and sugar yield increases were not obtained by any of the asulam mixtures because johnsongrass control was not improved. Asulam applied again in May to johnsongrass regrowth improved late-season control in two of the three studies over a single early POST application, but cane and sugar yields were not increased.

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“…Season-long johnsongrass [Sorghum halepense (L.) Pers.] competition has reduced sugar yields approximately 50% when compared with an untreated control (2,14).…”

Section: Resultsmentioning

confidence: 98%

Itchgrass (Rottboellia cochinchinensis) Interference in Sugarcane (Saccharumsp.)

Lencse¹,

Griffin²

1991

Weed technol.

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Field studies were conducted in the northern and southern cane belt areas of Louisiana to determine the effect of itchgrass on sugarcane growth and yield. Itchgrass was allowed to interfere with sugarcane season-long, early-season from emergence in the spring until layby (last cultivation) in mid-June, and late-season from layby until harvest. Itchgrass germination occurred throughout the growing season. Populations of millable sugarcane stalks and yields of cane and sugar were similar for no interference, early-, and late-season interference. Season-long itchgrass interference reduced sugarcane stalk populations and cane and sugar yields an average of 34, 42, and 43%, respectively, compared with no interference.

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Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield

Cited by 22 publications

References 5 publications

Seasonal Infestations of Two Stem Borers (Lepidoptera: Crambidae) in Noncrop Grasses of Gulf Coast Rice Agroecosystems

Seasonal Infestations of Two Stem Borers (Lepidoptera: Crambidae) in Noncrop Grasses of Gulf Coast Rice Agroecosystems

Johnsongrass (Sorghum halepense) Control in Sugarcane (Saccharumsp.) with Asulam Applied Alone and in Mixtures

Itchgrass (Rottboellia cochinchinensis) Interference in Sugarcane (Saccharumsp.)

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