Biofumigation with brassica juncea, raphanus sativus and eruca sativa for the management of field populations of the potato cyst nematode globodera pallida

Ngala, B.M., Haydock, P.P.J., Woods, S.R. and Back, M.A. (2015) Biofumigation with brassica juncea, raphanus sativus and eruca sativa for the management of field populations of the potato cyst nematode globodera pallida. Pest Management Science, 71 (5). pp. 759-769.

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Abstract

The viability of potato cyst nematode (PCN) populations (Globodera pallida) was evaluated in three field experiments using Brassica juncea, Raphanus sativus and Eruca sativa amendments. These species were summer cultivated and autumn incorporated in experiment 1; in experiment 2, overwintered brassicaceous cover crops were spring incorporated. Experiment 3 involved determination of effects of metconazole application on biomass/glucosinolate production by B. juncea and R. sativus and on PCN pre- and post-incorporation. Glucosinolate contents were determined before incorporation. Following cover crop incorporation, field plots were planted with susceptible potatoes to evaluate the biofumigation effects on PCN reproduction. RESULTS: In experiment 1, PCN population post-potato harvest was reduced (P = 0.03) in B. juncea-treated plots, while R. sativus prevented further multiplication, but in experiment 2 there were no significant effects on PCN reproduction. In experiment 3, B. juncea or R. sativus either untreated or treated with metconazole reduced PCN populations. Glucosinolate concentrations varied significantly between different plant regions and cultivation seasons. Metconazole application increased the sinigrin concentration in B. juncea tissues. Glucosinolate concentrations correlated positively with PCN mortality for summer-cultivated brassicaceous plants. CONCLUSION: The results demonstrated that B. juncea and R. sativus green manures can play an important role in PCN management, particularly if included in an integrated pest management scheme.

Item Type: Article
Keywords: Brassica species, Globodera pallida, biofumigation, glucosinolate, isothiocyanate, potato cyst nematode, viability
Divisions: Crop and Environment Sciences
Depositing User: Ms Kath Osborn
Date Deposited: 31 Jan 2017 16:31
Last Modified: 31 Aug 2018 13:21
URI: https://hau.repository.guildhe.ac.uk/id/eprint/15094

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