Studies on Control of Nutsedge, Cyperus rotundus L., a Perennial weed in Upland Fields

邦和, 植木; 祐二, 山末

doi:10.3719/weed.1968.38

Cited by 2 publications

(3 citation statements)

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“…over a narrow range of temperature) then no further renewal of the species would have been possible after a natural or manmotivated disaster. Presence of up to 13 buds per tuber, most of which remain dormant (Ueki 1969), would also ensure revival. The peculiar sprouting behaviour of the nutsedge makes its control difficult and necessitates repeated aerial spraying of herbicides for its post-emergence eradication.…”

Section: Discussionmentioning

confidence: 99%

“…Black (mature) tubers exhibit the greatest degree of dormancy, while young, white (immature) tubers sprout easily. Ueki (1969) reported 3O°C-35°C as the optimum temperature range for tuber sprouting. However, the observations that purple nutsedge can infest early spring crops in Mosul while the mean monthly temperatures are hardly above 15°C, is contrary to the belief that the tubers sprout only in summer, when temperatures are above 30°C.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and Light Requirements for the Sprouting of Chilled and Unchilled Tubers of the Purple Nutsedge, Cyperus rotundus

Shamsi

Al-Ali

Hussain

1978

Physiologia Plantarum

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Mature and immature tubers of purple nutsedge (Cyperus rotundus L.) chilled at 0°C in dry and wet conditions, were sprouted along with fresh, unchilled tubers over a range of temperatures (1O°C-45°C) in light and darkness. Fresh immature tubers showed a high sprouting percentage at all temperatures between 20°C and 40°C, while the mature ones did so only at 30°C and 35°C. Chilling of dry tubers stimulated early sprouting and increased the maximum sprouting percentage of both the mature and immature tubers. Dry chilling also lowered the limit of favourable temperatures to 15°C in the case of mature tubers. Chilling of wet tubers had a depressing effect and no sprouting occurred below 30°C. At all temperatures, light apparently favoured the sprouting of both the mature and immature tubers (except mature wet-chilled ones at 35°C and 40°C). Immature tubers showed relatively higher sprouting percentage than the mature ones, both in light and darkness. Alteration of temperature requirements due to dry and wet chilling of the tubers is regarded as significant and functional in relation to the ecology of the species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature and Light Requirements for the Sprouting of Chilled and Unchilled Tubers of the Purple Nutsedge, Cyperus rotundus

Shamsi

Al-Ali

Hussain

1978

Physiologia Plantarum

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“…Being herbaceous perennial weeds, their complete eradication by hand or machine is im possible because the rhizomes and tubers of these weeds are not removable by such physical means (7). Although herbicidal against purple nutsedge, EPTC (S-ethyl dipropylthiocarbamate) (3,5), dichlobenil (2,6-dichlorobenzonitrile) (6), TFP (2,2,3,3-tetrafluoropropionic acid) (4), and 2,4-D [(2,4-dichlorophenoxy)acetic acid] (1,2) are also considerably phytotoxic to crops. Their application in cultivated fields is there fore very difficult.…”

Section: Introductionmentioning

confidence: 99%

Selective Control of Cyperaceous Weeds With K-223

et al. 1975

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A new urea compound, 1-(α,α-dimethylbenzyl)-3-p-tolylurea (hereinafter referred to as K-223) is characterized by its selective control of cyperaceous weeds. This compound does not show any Hill reaction inhibition or foliar contact toxicity. Its main effect is toxicity to roots. K-223 selectively controls slender spikerush [Eleocharis acicularis(L.) R. & S.], purple nutsedge (Cyperus rotundusL.) and annual cyperaceous weeds. It is practically nontoxic to most broadleaf weeds. As the selectivity between crops and grass weeds is high, K-223 is applicable with little phytotoxicity. Thus sowing or transplanting is possible even just after application of K-223.

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Studies on Control of Nutsedge, Cyperus rotundus L., a Perennial weed in Upland Fields

Cited by 2 publications

References 0 publications

Temperature and Light Requirements for the Sprouting of Chilled and Unchilled Tubers of the Purple Nutsedge, Cyperus rotundus

Temperature and Light Requirements for the Sprouting of Chilled and Unchilled Tubers of the Purple Nutsedge, Cyperus rotundus

Selective Control of Cyperaceous Weeds With K-223

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