Impact of Invasive Plants on the Structure and Composition of Natural Vegetation of Northwestern Indian Himalayas<sup>1</sup>

Kohli, R. K.; Dogra, Kuldeep Singh; Batish, Daizy R.; Singh, Harminder Pal

doi:10.1614/0890-037x(2004)018[1296:ioipot]2.0.co;2

Cited by 96 publications

(62 citation statements)

References 9 publications

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“…In addition to phenolics, a recent report indicates lantadene A and B as more intoxicating allelochemicals present in Lantana [14]. Lantana is one of the most problematic weeds and the plant has evolved not only in plains of India but also in Himalayan regions [15].…”

Section: Lantana Camera Lmentioning

confidence: 99%

Allelopathy Studies in Weed Science in India——A Review

Mushtaq¹,

Siddiqui²

2017

IJNREM

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Allelopathy accounts for both beneficiary and detrimental biochemical relations amongst plants. The phenomenon has received great attention since the 1980's all over the world; however, in India, research on allelopathy just started in the late 1980's. Studies have been done with many crops, trees, shrubs and weeds under both laboratory bioassays and field trials to determine their allelopathic potential and its use for weed control. Plants belonging to the Asteraceae family are the most studied species for the allelopathic potential to control weeds. Among the Asteraceae species, allelopathic stress mediated by aqueous extract of differerent parts of Parthenium hysterophorus has been most studied. Allelopathic activity of Ageratum conyzoides has also received deep attention. The individual effect of some allelochemicals has also been investigated. The potential of allelopathy in weed interference on crop production was also studied. In conclusion, allelopathy research should run parallel with contemporary studies such as ecological, horticultural, agricultural, environmental and chemical studies, and an integrated approach ought to be adopted to completely utilize the applicability of allelopathic plant species to addressthe problem of weeds and look for their control.

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Section: Lantana Camera Lmentioning

confidence: 99%

Allelopathy Studies in Weed Science in India——A Review

Mushtaq¹,

Siddiqui²

2017

IJNREM

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“…Seeds of different weeds were collected from heavily infested fields near to Shoolini University. Withania somnifera plants (6 mo old) were excavated from the nursery area and stem, roots and leaves were separated and washed, dried and weighed separately [10,12].…”

Section: Chemicals and Instrumentationmentioning

confidence: 99%

“…The experiments were carried out in triplicate. There were 6 single-plantlet replications within each treatment and data were tested [10,12].…”

Section: Foliar Spray Bioassaymentioning

confidence: 99%

“…Ageratumcoenyzoidesis one such rapidly colonialized invasive alien species of family Asteraceae that has become a troublesome weed over a wide range of ecosystems. It is among the commonest weeds in the Himalayan regions and growing up to the elevation of 2400 min Himachal Pradesh [12,13]; in fact, around 50% of the area of Himachal Pradesh is said to be infected with this obnoxious weed [7].…”

Section: Introductionmentioning

confidence: 99%

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Bio-Herbicidal Efficiency of Withania Somnifera Against Important Himalayan Weeds

Sharma

Kaur

Puri

2017

Int J Pharm Pharm Sci

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Objective: The aim of the study was to evaluate the bioherbicidal activity of Withania somnifera against germination and growth of noxious weeds of Himalaya i.e. Ageratum coenyzoides, Chenopodium album and Achyranthus aspera in a laboratory and foliar spray bioassay which will act as a tool of weed management in the Himalayan region.Methods: Root, stem and leaf aqueous extract of Withania somnifera at 100% concentration were applied to determine their effect on the seed germination and seedling growth of tested weeds under laboratory condition. Foliar spray bioassay was carried out by spraying extracts of Withania somnifera on three-month-old seedlings of weeds for two months. Germination and growth of weeds were assessed using growth parameters into account i.e. germination percentage, stem length, root length, fresh weight, dry weight, no of shoot branches and no of root branches. Results:The results revealed that all the aqueous extracts markedly suppressed germination and seedling growth of A. coenyzoides, C. album and A. aspera. Withania extracts remarkably effected germination, the growth of Ageratum coenyzoides in comparison to other studied weeds. The leaf extract of Withania was more pronounced than stem and root extracts in germination assay. Infoliarspray bioassay, aqueous leaf extracts of 100% w/v concentrations were sprayed on three month old seedlings of weeds at an interval of 5 d. All the aqueous extracts significantly suppressed shoot length, root length, fresh weight and dry weight of Ageratum coenyzoides, Chenopodium album and Achyranthus aspera seedling. In foliar spray bioassay, leaf extract suppressed the stem length, root length, fresh weight, dry weight, no. of root branches and no of shoot branches of studied weeds more commendably than stem and root extract. The suppression of growth parameters could be attributed to the presence of phytochemicals present in the extracts of Withaniasomnifera. Conclusion:The present study concludes that Withania somnifera contain bio-herbicidal compounds in leaf, stem and root as plant extracts adversely affect weed growth of studied weeds. Henceforth the strategy bio-control of weed is a safe and effective method which could prove a milestone in weed management in Mid-Himalaya.

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“…Invasion is usually noticed once the plant has already naturalized. As a result, the introduction of alien species has been recognized as one of the most serious threats to our ecological, social and economic wellbeing (Cox, 2004; Kohli et al, 2004). About is from 23 °C to 5 °C.…”

Section: Introductionmentioning

confidence: 99%

Diversity, Distribution and Uses of Invasive Alien Angiosperms of Rampur District (U.P.), India

2017

IJAPSA

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Invasive alien angiosperms have become an environmental concern in India. A survey of invasive alien angiosperms of Rampur district was made. The data revealed that both aquatic and terrestrial invasive alien angiosperms are becoming threat to the native flora as they reproduce rapidly and crowding out native species. In the present paper 33 invasive alien angiosperms belonging to 23 families are recorded. The contribution of tropical America (70 %) including South America (15 %) is noteworthy. From the interaction with local people and literature survey it was found that invasive alien angiosperms were used as medicine (20), fodder (8), ornamental (8), vegetable (2) and fibre (1).

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Impact of Invasive Plants on the Structure and Composition of Natural Vegetation of Northwestern Indian Himalayas¹

Cited by 96 publications

References 9 publications

Allelopathy Studies in Weed Science in India——A Review

Allelopathy Studies in Weed Science in India——A Review

Bio-Herbicidal Efficiency of Withania Somnifera Against Important Himalayan Weeds

Diversity, Distribution and Uses of Invasive Alien Angiosperms of Rampur District (U.P.), India

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Impact of Invasive Plants on the Structure and Composition of Natural Vegetation of Northwestern Indian Himalayas1

Cited by 96 publications

References 9 publications

Allelopathy Studies in Weed Science in India——A Review

Allelopathy Studies in Weed Science in India——A Review

Bio-Herbicidal Efficiency of Withania Somnifera Against Important Himalayan Weeds

Diversity, Distribution and Uses of Invasive Alien Angiosperms of Rampur District (U.P.), India

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Impact of Invasive Plants on the Structure and Composition of Natural Vegetation of Northwestern Indian Himalayas¹