Hatching, motility, and infectivity of root-knot nematode (Meloidogyne javanica) following exposure to sodium hypochlorite

Stanton, J. M.; O'Donnell, W. E.

doi:10.1071/ea9940105

Cited by 13 publications

(2 citation statements)

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“…Serious phytotoxicity occurred at concentrations above 50 ppm, and 15 to 25 ppm seemed the best in terms of balancing good bacterial wilt control with minimal phytotoxicity. There is also evidence showing that NaOCl is effective against root-knot nematodes in hydroponic systems [89]. Chloramine and chlorine dioxide (ClO 2 ) are two other chlorine-based disinfectants which have only rarely been used in hydroponic or recirculation systems.…”

Section: Chlorinementioning

confidence: 99%

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Alsanius²,

et al. 2001

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Recirculating nutrient systems offer a good method to control nutrient leaching from greenhouses into the environment. However, the potential for the rapid spread of root diseases is the main hindrance to adoption of recirculating nutrient systems by the greenhouse industry. This review discusses and compares five broadly different methods of disease control in these systems, namely heat, filtration, chemical, radiation and biological control. Each has strengths and weaknesses, but all have been found to be effective in terms of pathogen control. Sterilization (heat, oxidizing chemicals, UV radiation) and membrane filtration methods are generally very effective, but may adversely affect beneficial microorganisms in the recirculated solution. Slow filtration and microbial inoculation methods are less disruptive of the microflora, but effectiveness may vary with the pathogen. Microbial inoculation holds the promise of very targeted disease suppression, but few products are commercially available. recirculation / disinfestation / hydroponics / disinfection / root diseaseRésumé -Désinfestation des solutions nutritives recyclées en horticulture sous serre. L'utilisation de systèmes de recirculation des nutriments est une bonne façon de contrôler le lessivage des nutriments des serres dans l'environnement. Toutefois, le risque de propagation rapide de maladies des racines est le principal obstacle à l'adoption de tels systèmes par l'industrie serricole. La présente étude examine et compare cinq façons distinctes de contrer les maladies dans ces systèmes, à savoir le traitement thermique, la filtration, le traitement chimique, le rayonnement et la lutte biologique. Chacune de ces méthodes a ses points forts et ses points faibles, mais toutes se sont révélées efficaces pour combattre les pathogènes. La stérilisation (par la chaleur, l'utilisation d'agents oxydants ou le rayonnement ultraviolet) et la filtration sur membrane sont habituellement très efficaces, mais peuvent nuire aux microorganismes utiles dans la solution recirculée. La filtration lente et l'inoculation microbienne sont moins nuisibles à la microflore, mais leur efficacité peut varier selon le pathogène. L'inoculation microbienne permet une élimination très sélective des maladies, mais peu d'inoculants microbiens sont disponibles dans le commerce. recirculation / désinfestation / culture hydroponique / désinfection / maladie des racinesAgronomie 21 (2001) 323-339 323

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Section: Chlorinementioning

confidence: 99%

Disinfestation of recirculating nutrient solutions in greenhouse horticulture

Alsanius²,

et al. 2001

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“…When J2s were exposed to >2 g accessible chlorine/ml for >24 hours, their motility and ability to generate galls were eliminated (Wood and Foot, 1975). A study that applied sodium hypochlorite to irrigation water and hydroponic growing media to control RKN (M. javanica) concluded that the nematode's hatch, motility, and infectivity were not affected (Stanton and O'Donnell, 1994), Perhaps the concentration of the applied disinfectant was low in order to prevent negative effects on growing plants.…”

Section: Virkon S Nematicidal Effect On M Incognita Reproduction and ...mentioning

confidence: 99%

Nematicidal Activity, Oxidative Stress and Phytotoxicity of Virkon®S on Tomato Plants Infected with Root-knot Nematode

Ali

Khairy

Ashry

et al. 2023

Egyptian Journal of Agronematology

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As a global industry, agriculture requires new chemical materials with novel properties to control stubborn pests such as soil-borne diseases. So, Virkon ® S disinfectant that contains oxone (potassium peroxymonosulfate) and sodium dodecyl benzenesulfonate was tested. The study investigated Virkon S nematicidal activity against root-knot nematode (RKN), Meloidogyne incognita, given the lack of data. Egg hatching inhibition was more significant than 50% after one hour of egg masses exposure at a concentration of 0.4% (w/v) in Petri dishes. Virkon S can disintegrate gelatinous egg masses, generating tiny clusters that soon transform into free eggs with a high hatching reduction during embryonic development. Second stage juveniles (J2s) showed exceptional hyperactivity and excitation after less than an hour of exposure before becoming paralyzed, where 1% (w/v) concentration obtained 99.20% mortality after 12 h. Virkon's toxicity increased with concentration, followed by a short latency period, especially against eggs. Virkon S's significant nematicidal activity was evident following tomato J2s inoculation. Virkon S increased fresh root and shoot weight parameters with an increasing percentage directly proportional to applied concentrations 60 days post-application. Virkon S reduced the numbers of J2s and eggs and soil RKN reproduction at various concentrations. Additionally, all Virkon S concentrations had the least galls and egg masses/root, with the concentration of 1% having the most significant reduction in reproduction factor. Increasing the applied concentration through soil drenching led to increases in total sugar, protein, phenolic, and flavonoid content and antioxidant activity, as well as a reduction in nitrate and oxidative enzyme activities in tomato roots with no observed phytotoxic effect on plants; however, foliar spraying with concentrations greater than 0.5% (w/v) caused local leaf scorch injury, developed with 3% (w/v) concentration to plant top death and growing side buds below the damaged area. Finally, the nematicidal activity of Virkon S has been approved, but more studies are needed to eliminate its limited use in plant production.

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