Technological Advances in Huanglongbing (HLB) or Citrus Greening Disease Management

Paudyal, Krishna Prasad

doi:10.3126/jnarc.v1i0.15735

Cited by 12 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They are namely, "Candidatus Liberibacter asiaticus"(CLas), "Candidatus Liberibacter africanus"(CLaf) and "Candidatus Liberibacter americanus"(CLam) (Timilsina, 2019b;Villechanoux et al, 1992;Villechanoux et al, 1993;Jagoueix et al, 1997). These bacteria are non-cultured, gram-negative, fastidious, phloemlimited bacteria (Paudyal, 2015;Halbert and Manjunath, 2004). These affect the transport of phloem, cause root dysfunction, reduce foliar density in the tree canopy, and eventually halts citrus production (Gottwald, 2010;Johnson et al, 2014).…”

Section: Causative Agentmentioning

confidence: 99%

“…The responses of different citrus species to the causative agent are fluctuating (Paudyal, 2015). There is no resistant citrus cultivar known so far.…”

Section: Use Of Tolerant Varietiesmentioning

confidence: 99%

“…Guava intercropping is one of the cheapest methods of citrus greening management and can help establish new orchards. Farmers of Vietnam were first to practice guava intercropping with citrus and the attention of scientific researchers and workers of many countries were drawn during the 1990s initiating studies to understand its usefulness (Paudyal, 2015). For a long time, farmers from Mekong Delta of South Vietnam have been practicing guava interplanting in citrus orchards and those orchards planted with guava showed much lower levels of psyllid infestation and also a low incidence of HLB compared to citrus orchards lacking guava (Hall et al, 2007).…”

Section: Trap Cropping and Guava Intercroppingmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Greening Disease and Integrated Management of Candidatus Liberibacter Species in Citrus

Joshi¹,

Khanal²

2020

Review.food.agr.

View full text Add to dashboard Cite

Citrus greening disease, recently known as huanglongbing disease, is known to wreak havoc not only in Nepal but across the globe as it is non-curable once trees are affected. In 1919, this disease was reported first time in China, most likely originating from Taiwan. It then spread to more than a hundred countries and was recorded in Nepal for the first time from Pokhara Valley in 1968. Till now, there is no established solution for this century-old and yet, newly evolving disease. Being a vector-borne bacterial disease, the use of antibiotics had been a practice on a large scale that had led to the development of resistance. This disease has been more challenging to the developing and least- developed countries like Nepal. Thus, this paper aims to solve the problems of all the farmers engaged in citriculture by making them aware of the best-integrated management approaches that would help them increase their productivity and ultimately contribute to food security and sustainability. Detailed information about the disease, together with various techniques for integrated management and control of this disease is in this review. Thus, this paper will help farmers, traders, and planners.

show abstract

Section: Causative Agentmentioning

confidence: 99%

“…The responses of different citrus species to the causative agent are fluctuating (Paudyal, 2015). There is no resistant citrus cultivar known so far.…”

Section: Use Of Tolerant Varietiesmentioning

confidence: 99%

Section: Trap Cropping and Guava Intercroppingmentioning

confidence: 99%

See 1 more Smart Citation

A Review on Greening Disease and Integrated Management of Candidatus Liberibacter Species in Citrus

Joshi¹,

Khanal²

2020

Review.food.agr.

View full text Add to dashboard Cite

show abstract

“…Huanglongbing (HLB/citrus greening) which is one of the main diseases in the world caused by Candidatus liberibacter Asiaticus bacteria (Ca. Welding) and infected by an Asian citrus psyllid (ACP, Diaphorina citri Kuwayama) affects the plant growth, production and quality [2][3][4]. This is thought to be due to HLB, which inhibits root growth, reduces water and nutrient uptake, and causes plants to grow well.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Soil Fertility on Growth and Development of Two Citrus Cultivars Under Two Locations

Devy¹,

Dwiastuti²,

Hardiyanto³

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The response of citrus cultivar on soil fertility under different locations has been known prior to its fertilizer application. The aim of this research was to study the effects of different soil fertility on the growth and development of citrus cultivars under two locations. This research was conducted at Langgam Subdistrict, Pelalawan Regency, Province of Riau, Indonesia from February to June 2020. The three-year-old citrus trees of Siam (Tangerine) cv. Pontianak/SP (C. nobilis) and Keprok (Mandarin) cv. Tejakula/KTJ (C. reticulata Blanco) were used in this study. A statistical comparison (Student’s t-test) was used to compare the growth of two citrus cultivars planted into two locations. The nutrient contents in soil and leaves were determined; the growth parameters and leaf pigments were observed and the correlations were analysed. The results showed that status of soil nutrition in two locations ranged low to medium, with pH of 5.1-6.0. At the first location, SP absorbed elements of Ca, Mg, Fe, Zn and Mn 24.1% higher than KTJ. On the other hand, KTJ could absorb the P, K, Na, S and B elements by 24.4% higher than SP. However, at the second location SP is more adaptive on absorbing the elements of N, Na, Mg, S, Zn and B by 26.9% higher than KTJ, while this cultivar could absorb only 10.3% higher of K and Mn. Status value of chlorophyl a and b of citrus cultivar grown in location I was higher. A positive linear relationship has been found between all growth variables with C organic, EC, CEC, Fe, P2O5, K, Ca, pH, and SO4 of soil. The same relation has been found with increasing trunk cross-sectional area (TCA) for growth of plant height and canopy of both cultivars. In general, the growth and development of Siam Pontianak was better than Mandarin Tejakula. The status of soil nutrition and the initial growth performance of each cultivar can be used as a guideline for the application of balanced fertilizers to produce plants that grow optimally.

show abstract

“…Citrus greening is associated with three species of gramnegative, unculturable, and phloem-restricted bacteria: Candidatus Liberibacter asiaticus, Candidatus Liberibacter africanus, and Candidatus Liberibacter americanus. Candidatus Liberibacter asiaticus is the most common species distributed all over Asia including Nepal (Paudyal, 2015). The disease is transmitted by an insect vector, Asian Citrus Psyllid (Diaphorina citri).…”

Section: Introductionmentioning

confidence: 99%

Understanding Citrus Greening Disease and Its Possible Management Strategies in Nepal

Pokhrel

Pandey

Ghimire

et al. 2021

Int J Appl Sci Biotechnol

View full text Add to dashboard Cite

Huanglongbing (HLB), also known as citrus greening, is a devastating disease of citrus that has decimated several citrus orchards throughout the world. The disease is associated with three species of unculturable and phloem-limited bacteriae, Candidatus Liberibacter asiaticus, Candidatus Liberibacter africanus and Candidatus Liberibacter americanus. The most common species of bacteria found in Nepal is Candidatus Liberibacter asiaticus which is transmitted by an insect vector, Asian citrus psyllid (Diaphorina citri). This disease has been detected in several economically important citrus production areas of Nepal, which resulted in heavy yield loss. No cure for the disease has been discovered yet and it is essential to practice proper management strategies to maintain citrus health and sustain citrus production under HLB pressure. Several disease management approaches such as pathogen-free nursery establishment, use of disease tolerant rootstock cultivars, proper irrigation and nutrient supply, removal of HLB affected trees, and control of psyllid with frequent insecticide application are widely practiced throughout the world. This review article highlights the characteristics of the citrus greening disease and its insect vector and gives insights into their management techniques. Several technologically advanced options available to minimize the HLB infection might not be feasible currently in Nepal due to economic and topographic constraints. This article also aims to bring into focus the cost-effective methods that growers in Nepal can practice to mitigate the impact of HLB disease in their citrus orchards. Int. J. Appl. Sci. Biotechnol. Vol 9(4): 227-238.

show abstract

Technological Advances in Huanglongbing (HLB) or Citrus Greening Disease Management

Cited by 12 publications

References 34 publications

A Review on Greening Disease and Integrated Management of Candidatus Liberibacter Species in Citrus

A Review on Greening Disease and Integrated Management of Candidatus Liberibacter Species in Citrus

Effect of Different Soil Fertility on Growth and Development of Two Citrus Cultivars Under Two Locations

Understanding Citrus Greening Disease and Its Possible Management Strategies in Nepal

Contact Info

Product

Resources

About