Diseases of Callistemon viminalis (Bottlebrushes)

Author(s):  
S. Parthasarathy ◽  
G. Thiribhuvanamala ◽  
P. Muthulakshmi ◽  
K. Angappan
Separations ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 68
Author(s):  
Pankaj Kumar Jha ◽  
Watsa Khongnakorn ◽  
Chamorn Chawenjkigwanich ◽  
Md Shahariar Chowdhury ◽  
Kuaanan Techato

In this paper, the green synthesis of reduced graphene oxide (r-GO) nanomaterials using Callistemon viminalis leaf extract as a reducing and stabilizing agent is reported for the first time. The synthesized r-GO nanomaterials were characterized using UV–Vis, XRD, FE-SEM, TEM, and energy dispersive X-ray (EDX) analyses. The nanofilter membrane was prepared by varying the amounts of r-GO nanomaterials in a Polysulfone-N,N-dimethyl formamide (DMF) solution. The nanofilter membrane was characterized by the contact angle, atomic force microscopy (AFM), UV–Vis, and FTIR. The results confirm the formation of r-GO nanomaterials. Higher amounts of r-GO nanomaterials in the membrane show a lower contact angle, thus confirming their hydrophilic nature. Iron water filtration was performed with different amounts of r-GO nanomaterials in the membrane filter, and the water flux was smooth over an increased time period. Inductively Coupled Plasma (ICP) analysis showed a higher percentage of iron rejection (95.77%) when higher amounts (0.10 g) of r-GO nanomaterials were used in a mixed membrane (i.e., sample C). In conclusion, the findings illustrate that Callistemon viminalis mediates the synthesis of r-GO nanomaterials, which is useful in water filtration, and can be incorporated into membrane filters, since it removes iron.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yu-Qing Xiang ◽  
Hong-Xin Liu ◽  
Li-Yun Zhao ◽  
Zhi-Fang Xu ◽  
Hai-Bo Tan ◽  
...  

1968 ◽  
Vol 46 (10) ◽  
pp. 1287-1295 ◽  
Author(s):  
A. N. Purohit ◽  
K. K. Nanda

The annual growth cycle of Callistemon viminalis consists of three phases: (1) a reproductive phase that continues till the end of February; (2) a vegetative phase that lasts from the end of February till the end of August; and (3) a long dormant phase which lasts till the end of December. The cycle exhibits four growth flushes with alternating periods of active growth and rest. The duration of the successive rest periods increases, leading eventually to the onset of the long dormant phase.The growing apex exhibits more or less similar histological changes in different growth flushes. An increase in divisional activity of the cells of flanking meristem, accompanied by a decline in the elongation of cells of pith rib meristem, characterizes the rest period. During the active period of growth, the cells of the pith rib meristem elongate but the activity of the flanking meristem decreases. The number of leaves produced in each growth flush, therefore, is dependent upon the duration of the preceding rest period, and their size and nature on the duration of active growth. In growth flush 1 the cells of the rib meristem show elongation twice during the active period corresponding with the separation of floral buds and of foliage leaves respectively. In the long dormant phase, on the other hand, the cells of the flanking meristem show high divisional activity twice, first during September when new leaf primordia are initiated, and again during November when floral buds are initiated. Events of great significance thus occur during the long dormant phase. The reproductive development is characterized by a marked increase in the rate of cell division in the flanking meristem accompanied by cessation of growth, the features that characterize the rest period as well.


2017 ◽  
Vol 76 (2) ◽  
pp. 120-131 ◽  
Author(s):  
Filip Verloove

Abstract Recent fieldwork in Gran Canaria and Tenerife (Canary Islands, Spain), mostly between 2012 and 2016, yielded new chorological data for several non-native vascular plant species. The following are considered naturalized and/or potentially invasive: Callistemon viminalis, Casuarina glauca, Chloris barbata, Cyperus difformis, Eucalyptus gomphocephala, E. sideroxylon, Nephrolepis cordifolia, Rumex palustris, Senna × artemisioides (s.l.) and S. × floribunda and are reported for the first time from the Canary Islands. Other first records include: Cascabela thevetia (Tenerife), Cyclospermum leptophyllum (Gran Canaria), Digitaria radicosa (Gran Canaria, Tenerife), Dysphania anthelmintica (Tenerife), Erythrostemon gilliesii (Tenerife), Heliotropium supinum (Tenerife), Limoniastrum monopetalum (Tenerife), Nerium oleander (Tenerife), Pascalia glauca (Tenerife), Phytolacca americana (Tenerife), Podranea ricasoliana (Gran Canaria), Psidium guajava (Gran Canaria), Rumex cristatus (Tenerife), Schinus terebinthifolia (Tenerife), Solandra maxima (Tenerife), Tipuana tipu (Tenerife) and Youngia japonica (Gran Canaria). More than 20 additional taxa also represent chorological novelties but are considered ephemerals. Finally, miscellaneous notes are added for Diplachne fusca subsp. uninervia, Eclipta prostrata, Pluchea carolinensis, Prosopis juliflora and Sida rhombifolia from Gran Canaria.


2017 ◽  
Vol 9 (3) ◽  
Author(s):  
Daniele Aparecida do Couto ◽  
Felipe Da Silva Dias ◽  
Mírian Lobo Sáber

Since the induction of chemical defensives in agriculture, human beings have suffered from our own actions, caused by the indiscriminate and abusive use of those substances; therefore, researches have been motivated to look for alternative ways, aiming to use plant inputs to control pathogenic agents in agriculture. As the essential oils from the species Eucalyptus globulus (eucalyptus), Callistemon viminalis (weeping bottlebrush), Cymbopogon winterianus (citronella grass) and Tetradeniariparia (misty plume bush) have proved effectiveness and an immense applicability, this research studied the use of those essential oils, aiming the effectiveness against plant pathogens. The plants were collected from Universidade do Vale do Sapucaí, Pouso Alegre (MG). The fungi’s samples belong to the mycology collection from the institution and the tests were based on the mycelial development comparison of the control fungi on the dishes with essential oils. Notice that the inhibition caused by the oils over fungi’s mycelial developing and the analysis of the data have been made through Turkey’s statistic. From the data analyzed, it was possible to realize that the citronella’s grass essential oil was efficient to control the mycelial development of fungi analyzed, followed by, in order of efficiency, the eucalyptus oil, the weeping bottlebrush oil and the misty plume bush oil.


2004 ◽  
Vol 28 (3) ◽  
pp. 515-519 ◽  
Author(s):  
Patrícia Duarte de Oliveira Paiva ◽  
Paulo Roberto Corrêa Landgraf ◽  
Tatiana Michlovská Rodrigues ◽  
Deborah de Oliveira Pedroso ◽  
Ary Teixeira de Oliveira Filho ◽  
...  

O campus da Universidade Federal de Lavras possui 508 ha, sendo 117 ha de área construída onde se localizam os departamentos e setores. Nessa área está o canteiro central, que divide as duas principais avenidas da universidade. Essa área é arborizada, porém, não há nenhum mapa com a localização das espécies. Objetivou-se então realizar um inventário dessas árvores, fazendo-se a locação, identificação, quantificação e caracterização delas. A identificação foi feita mediante observação, consulta com outros profissionais, bibliografia especializada e herbário. Foram identificadas 46 espécies arbóreas distribuídas num total de 182 exemplares, pertencentes a 24 famílias. A espécie Callistemon viminalis G.Don ex Loud, popularmente conhecida como escova-de-garrafa, foi a que apresentou maior ocorrência, com 23 indivíduos, seguida do ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.), com 15 indivíduos. Das espécies plantadas, 84% são nativas. Observou-se uma variedade de espécies locadas cumprindo o objetivo do plantio para uso em aulas práticas e embelezamento.


2017 ◽  
Vol 20 ◽  
pp. 61-65 ◽  
Author(s):  
Lin Wu ◽  
Yalong Zhang ◽  
Xiaobing Wang ◽  
Ruihuan Liu ◽  
Minghua Yang ◽  
...  

2018 ◽  
Vol 21 (7) ◽  
pp. 696-701 ◽  
Author(s):  
Hong-Xin Liu ◽  
Hai-Bo Tan ◽  
Sai-Ni Li ◽  
Yu-Chan Chen ◽  
Hao-Hua Li ◽  
...  

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