Incidence of root-knot nematode (Meloidogyne incognita) in black pepper in Karnataka

Ravindra, H.; Sehgal, Mukesh; Manu, T. G.; Murali, Rajmohan; Latha, M; Narasimhamurthy, H. B.

doi:10.5897/jen2013.0089

Cited by 14 publications

(3 citation statements)

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“…The high use of inorganic fertilisers also increases potassium and phosphorus in the soil that favours nematodes inoculum reproduction (Giné et al, 2016). High disease incidence and severity concur with earlier studies by Shahid et al (2007) and Ravindra et al (2014), who reported 75-100% RKNs disease incidence in tomato.…”

Section: Farmers' Management Practices Againstsupporting

confidence: 86%

Farmer knowledge, management practices and occurrence of tomato root knot nematodes in Kenya

Birithia,

Kuria

2023

Afr. Crop Sci. J.

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Root-knot nematodes (RKNs) (Meloidogyne spp.) is a major constraint to tomato (Solanum lycopersicum L.) production in sub-Saharan Africa; yet there is low adoption of recommended nematode control measures in regions like east Africa due to inadequate farmer knowledge about the pest and associated diseases. The objective of this study was to assess farmers’ knowledge status, and intensity of damage of root-knot nematodes and their management practices in Kenya. A survey was conducted in Kenya, during February to August 2021; using a semi-structured questionnaire administered to 282 randomly selected household heads of actively growing tomato farmers, at two elevations in three counties. Most farmers (98.9%) could not identify the disease precisely. They mostly attributed its symptoms to moisture stress and nutrient deûciencies. Most farmers (63%) practiced mono-cropping; while only 4.3% of farmers amended soils with manure. Respondents preferred growing RKN susceptible tomato varieties, mainly Rio-Grande, Cal J, Onyx and Kilele FI. A total of 92% expressed willingness to shift to RKNs resistant varieties, if recommended varieties match their desirable characteristics. Majority of the respondents lacked knowledge on nematode characteristics and its associated disease control. A total of 37.9% of the respondents did not use control measures against the RKNs. There was high disease incidence, severity and galling index in the surveyed areas.

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Section: Farmers' Management Practices Againstsupporting

confidence: 86%

Farmer knowledge, management practices and occurrence of tomato root knot nematodes in Kenya

Birithia,

Kuria

2023

Afr. Crop Sci. J.

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“…'Kuching' is one of the traditional cultivars grown with high yields but it is highly prone to major root diseases, e.g., root knot nematodes (RKN) (Izzah and Wan Asrina, 2019). In Malaysia, RKN are ubiquitous, severely damage black pepper roots (Trinh, 2010) and are among the major causes of reduced yields and quality in black pepper (Ravindra et al, 2014). Therefore, eco-friendly strategies to reduce RKN infestation in black pepper are required, especially owing to the fact that a given black pepper farm can be infested by many RKN species at one time (Trinh, 2010).…”

Section: Introductionmentioning

confidence: 99%

Reducing root galling caused by root knot nematodes in black pepper (<em>Piper nigrum</em> L. cv. ‘Kuching’) through nutrient supplementation

et al. 2022

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Purpose: Root-knot nematodes (RKN) remain one of the leading causes of economic damage in black pepper (Piper nigrum L.) cultivation worldwide. An experiment was conducted to evaluate the response of black pepper plants to RKN when irrigated with three nutrient solutions; Hoagland solution only, Hoagland solution + 0.005 mM potassium silicate solution, and Hoagland solution + 2 mM salicylic acid solution.Research Method: Plants grown in medium-sized polybags were inoculated with RKN and routinely irrigated with the appropriate nutrient solutions. Presence of foliar symptoms of RKN infection on plants, their aerial growth plus root infestation were assessed. Superoxide anion and hydrogen peroxide production from the plant leaves were also detected after inoculation.Findings: Foliar symptoms of RKN infection started manifesting after 81 days from inoculation. Plants without silicate or salicylic acid supplementation displayed the most severe foliar disorder symptoms, highest root galling and the shortest aerial growth. Plants irrigated with potassium silicate had the highest aerial growth and their leaves showed the least oxidative stress when challenged with RKN.Originality/value: From present results, soil amendment with potassium silicate is a promising tool for reducing root galling and promoting aerial growth in RKN-infested black pepper fields.

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“…Kuching is the traditional cultivar, with high yields, most preferred variety for creamy white pepper production but with the thinnest pericarp and highly prone to major root parasites and diseases for example root-knot nematodes (Megir & Paulus, 2011). Such root parasites severely damage black pepper roots ultimately causing poor development of the plant root stock (Megir & Paulus, 2011) which negatively impacts black pepper yields (Ravindra et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Producing Black Pepper (Piper Nigrum L. cv. ‘Kuching’) Rootstock in a Deep-Water Culture Hydroponic System

King

Khadijah²,

Ong³

2021

BJRST

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Stem cutting is the common planting material for black pepper (Piper nigrum L.) farmers mainly because the method is cheap, easy to obtain, and produces satisfactory number of new plantlets, which are relatively genetically uniform to their parent. However, soil propagation of stem cuttings renders both the stem and developing roots susceptible to soil borne pathogens, ultimately compromising the quality of the plant. Good quality rootstock of the new plant promotes faster, safer, and better black pepper plant establishment. Hydroponic farming thus offers a good platform for producing quality rootstock of the new plants and has gained importance to many farmers due to its flexibility in manipulating plant growth conditions and timely pathogen management, thus safer, healthier, and faster growth. This study investigated the growing media suitable for rootstock growth of P. nigrum L. cv. ‘Kuching’ and compared the rooting ability between stem cuttings with adventitious roots at the time of planting and stem cuttings without any root at the time of planting. In a laboratory setting, a total of 210 stem cuttings were hydroponically planted in seven nutrient compositions, with each nutrient composition containing an equal number of stem cuttings with adventitious roots at the time of planting and stem cuttings without any root at the time of planting. Hoagland solution supplemented with 0.005 mM potassium silicate solution (T4) and Hoagland solution supplemented with 2 mM salicylic acid solution (T6) showed faster root initiation whereas T1 (Hoagland solution only) produced the highest increment in root length followed by T6. The least suitable nutrient composition was T5 [T4 + 6 mL of 1 M Ca (NO3)2.4H2O solution]. The total number of roots was highest in plants from stem cuttings which had some adventitious roots at the time of planting, whereas roots in plants from stem cuttings which did not have any root at the time of planting, increased in root length faster than plants withstem cuttings which had adventitious roots at the time of planting.

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Incidence of root-knot nematode (Meloidogyne incognita) in black pepper in Karnataka

Cited by 14 publications

References 1 publication

Farmer knowledge, management practices and occurrence of tomato root knot nematodes in Kenya

Farmer knowledge, management practices and occurrence of tomato root knot nematodes in Kenya

Reducing root galling caused by root knot nematodes in black pepper (<em>Piper nigrum</em> L. cv. ‘Kuching’) through nutrient supplementation

Producing Black Pepper (Piper Nigrum L. cv. ‘Kuching’) Rootstock in a Deep-Water Culture Hydroponic System

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