If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Interaction between relative humidity and resistance to Dasineura tetensi in blackcurrant

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Abstract

1 Infestation by the blackcurrant leaf midge Dasineura tetensi and galling incidence on a susceptible (cv. ‘Öjebyn’) and a moderately resistant (cv. ‘Storklas’) blackcurrant genotype was studied in the field for two midge generations in the same growing season. On the resistant genotype gall initiation is delayed.

2 The relation between infestation and galling incidence showed considerable variation between the two generations. Galling symptoms produced by the second midge generation were weak on the resistant as compared with the susceptible blackcurrant.

3 Because larval development of that generation coincided with a period of dry and warm weather, it is possible that larvae on the resistant genotype suffered desiccation to a greater extent than larvae on the susceptible genotype where gall development was stronger.

4 The possible interaction of relative humidity and expression of resistance was investigated in controlled environment experiments. The resistant ‘Storklas’ and a susceptible (‘7801–31’) currant genotype were studied at two constant relative humidities, 30 and 70%.

5 Larvae of D. tetensi suffered from higher mortality and reduced growth rate on both genotypes in the low humidity environment.

6 There was also a significant plant genotype by humidity interaction on larval performance; no galls were produced and no larvae completed development on the resistant currant at low humidity.

7 There was a trend for a positive correlation between larval length and larval density on a plant at low humidity but not at high humidity.

Keywords: Cecidomyiidae; Ribes nigrum; gall midge; genotype by environment interaction; hygrothermal stress

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1461-9555.2001.00110.x

Affiliations: Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences (SLU), PO Box 4097, S-904 03 Umeå, Sweden

Publication date: August 1, 2001

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more