Causes of citrus decline and its management practices adopted in Myagdi district, Nepal

Poudel, Anit; Sapkota, Sabina; Pandey, Nabin; Oli, Dipesh; Regmi, Rajiv

doi:10.1016/j.heliyon.2022.e09906

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…These problems are common in ACP rearing as (Skelley & Hoy, 2004) mentions in their notes. Muraya and Citrus are favoured host plants for ACP (Hall, 2014;Setyaningrum et al, 2023) which also naturally favor other insects such as Thrips, Frankliniella spp ((Hall, 2014), scale insects (Poudel et al, 2022), and any other insect from various orders (Zuhran et al, 2021). Spider, especially from the Aranea order is the mostly diverse group, consisting of over 42,000 species in 109 families, which are all predators and primarily feed on insects (Humenik et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Nuisance Insects of Rearing mass Asian Citrus Psyllid (ACP)Diaphorina citriUnder Controlled Conditions

Setyaningrum,

Martono,

Soffan

et al. 2023

BIO Web Conf.

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Rearing insects for pest experiment it’s very critical. The condition of rearing such insects impacted the smooth running of research. This condition also happens in the rearing of Asian Citrus Psyllid (ACP), Diaphorina citri. ACP is one of the most dangerous pests of citrus since responsible for the huanglongbing disease vector in citrus. Many researchers, either laboratory or field-based use a D.citri for object experiments. A clear and recent description of the types of insects or arthropods that disturb the rearing ACP is needed, especially in Indonesia. The research was conducted in the greenhouse of Faculty of Agriculture, Gadjah Mada University, from January 2021 to September 2022. The rearing of ACP uses orange jasmine (Muraya paniculata) and citrus (Citrus nobilis). The collected insect and spider preserved in alcohol or pined in insect tray and identify them based on related literature. This study proposed to assess the nuisance insect that infested on rearing of D.citri based on greenhouse conditions. Our results showing that the many nuisance insects that disturb the growth of rearing in D.citri. A total of nine insect and spider attacking D citri, they are black ants (Dolichoderus sp), aphid (Aphis sp), leaf roller caterpillar (Phyllocnistis citrella), cockroach (Blattella sp), ladybug (Exochomus nigromaculatus), mite (Tetranychus sp), Mealy bug (Pseudoccocus sp), Scale insect (Aonidella aurantia) and Spider. Those nuisance insects and spiders attack D.citri colonies in different ways and stages. The attacking nuisance insect affected to affected the size of the ACP culture.

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Section: Resultsmentioning

confidence: 99%

Nuisance Insects of Rearing mass Asian Citrus Psyllid (ACP)Diaphorina citriUnder Controlled Conditions

Setyaningrum,

Martono,

Soffan

et al. 2023

BIO Web Conf.

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“…Early researchers revealed that HLB has been reported from most of the citrus growing districts in Nepal namely kaski, Tanahun, Gorkha, Syangja, Dhading, Kavre, Dhankuta (FAO, 2011). Positive result obtained from the recently submitted samples from Khotang, Sindhuli, Dailekh and Kailali districts proves the presence of greening in these districts too (Poudel et al, 2022) [18] . At present, the disease has been found prevalent in around 69 citrus producing districts of Nepal.…”

Section: Economic Impactmentioning

confidence: 97%

“…Mandarin and sweet orange variety of citrus has been found to be more susceptible to HLB. Citrus greening has been a major challenge for citrus growers in Nepal (Poudel et al, 2022) [18] . Roistacher (1996) has cautioned that "Greening will destroy citrus industry in Nepal slowly but surely, if necessary, measures are not taken in time" and also recommended implementation of certification programme in Nepal.…”

Section: Economic Impactmentioning

confidence: 99%

A review on economic impact of citrus greening on Mandarin production in Nepal

Chaulagai¹,

Shrestha²

2022

Int. J. Hortic. Food Sci.

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Citrus greening is found to be one of the most devastating diseases associated with three species of Candidatus liberibacter. The transmission takes place by Asian citrus psyllid and causes heavy yield loss in all type of citrus fruits especially on mandarin fruits. Destruction of many well established mandarin orchards by greening can be seen profusely in Nepal. It has reduced the mandarin productivity significantly on about 55 mandarin producing districts of Nepal. Yield was declined to around 9 Mt/ha from 12mt/ha in the course of only four years which might have gone very low if no proper control measures has been applied. Greening does not have any specific remedial therapy but application of various integrated management technologies can control the disease. Symptoms of greening can be seen on canopy as mottled leaves, on root system as reduced fibrous root, on fruits as lower juice quality and can be detected from external appearance of trees but the confirmation should be done through various laboratory tests. The disease had reached to almost all major mandarin producing districts and had affected farmers not only by reducing the production but also by decreasing fruit quality and increasing the management cost of mandarin. Greening can be controlled only by managing plants properly from seedling stage to fruiting period. High quality planting materials, application of essential fertilizers, nutrients and hormones, proper training and pruning, regular irrigation, pest management etc can reduce the effect of greening on mandarin. Citrus-Guava intercropping has also been found to give best result in vector reduction.

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