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Reaction of cotton and soybean cultivars to populations of Meloidogyne javanica and M. incognita in Zimbabwe

OAR@ICRISAT

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Relation http://oar.icrisat.org/4336/
http://www.world-food.net/scientficjournal/2006/issue3/abstracts/abstract44.php
 
Title Reaction of cotton and soybean cultivars to populations of Meloidogyne javanica and M. incognita in Zimbabwe
 
Creator Kutywayo, V
Kutywayo, D
Gwata, E
 
Subject Others
 
Description The response of common cotton (Gossypium hirsutum L.) and soybean [Glycine max L. (Merr.)] cultivars in Zimbabwe to infestation by Meloidogyne javanica (Treub) Chitwood and Meloidogyne incognita (Kofoid & White) Chitwwod races 1 and 3 was evaluated. This was done under greenhouse conditions in two separate experiments at Kutsaga Research Station, Zimbabwe, in a program aimed at identifying alternative rotation crops for root-knot nematode management in tobacco (Nicotiana tabacum L.). Seedlings of each cultivar were raised in sterilised soil in 15 cm diameter pots. The inoculum which was applied three weeks after sowing was a mixture of eggs and second stage juveniles (J2s). The dosage was 4000 mixed eggs and J2s per plant for the soybean trial while it was 5000 for cotton. Nine weeks after infestation, root gall indices, numbers of nematode egg masses and eggs per root system were recorded. The numbers of J2s per pot were also recorded. Reproduction factor (RF) was computed as final population (eggs + J2s) รท initial population inoculated. All the cotton cultivars were susceptible (RF>1 and abundant galling) to M. incognita Race 3 while they were all resistant (RF
 
Publisher WFL Publisher
 
Date 2006
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4336/1/JFoodAgricEnvironment_4%283-4%29223-227_2006.pdf
Kutywayo, V and Kutywayo, D and Gwata, E (2006) Reaction of cotton and soybean cultivars to populations of Meloidogyne javanica and M. incognita in Zimbabwe. Journal of Food, Agriculture & Environment, 4 (3-4). pp. 223-227. ISSN 1459-0263