English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The influence of late blight infections, caused by Phytophthora infestans, was evaluated on thirteen huckleberry (Solanum scabrum) varieties during the 2000 and 2001 cropping seasons in Dschang, Cameroon. A randomised split block design was used. Plants were sprayed four times with Ridomil Plus® (12% metalaxyl + 60% cuprous oxide) at 2.5 kg ha-1 on a 21-day schedule while control plots were not sprayed. Late blight intensity was recorded weekly and fresh shoot yields were evaluated six times at 14-day intervals. Fungicide applications significantly reduced late blight intensity and consequently increased huckleberry yields. Cumulative shoot yields varied with the variety and fungicide treatment, from 54.14 to 238.33 t ha-1. Yield losses due to late blight infection were estimated at up to 46%. Economic analyses indicated that fungicide sprays are necessary for a late blight protection programme in huckleberry. This spray regime based on fungicide application resulted in net profits of US$ 694 to $ 8,467 ha-1, depending on the variety used and the trial period. The results show that late blight infections if not controlled, decrease huckleberry yields, and consequently net farm incomes. High yielding resistant varieties or foliar applications of Ridomil Plus® may be incorporated in integrated pathogen management schemes against late blight in huckleberries with a view to minimise use of fungicides. Key Words: Integrated management, Phytophthora infestans, Solanum scabrum, yield loss Resume L'influence du mildiou, cause par Phytophthora infestans, etait evalue sur treize varietes de la morelle noire (Solanum scabrum) pendant les saisons culturalles de l'an 2000 et 2001 a Dschang, Cameroun. Les essais etaient realises en split-blocs pris au hazard. Les plantes etaient traitees quatre fois avec Ridomil Plus (12% de metalaxyl + 60% oxyde cuivreux) a 21 jours d'intervalle a la dose de 2.5 kg ha-1. L'intensite du mildiou a ete evalue hebdomadairement et les pousses fraiches ont ete recoltees six fois a l'intervalle de 14 jours. Des traitements fongicides ont significativement reduit l'intensite du mildiou et par consequent augmente le rendement en pousses. Le rendement total en pousses fraiches a ete variable. De 54, 14 a 238,33 t ha-1, selon la variete et le traitement fongicide. Des pertes en rendements associees aux attaques du mildiou ont atteint 46%. Des analyses economiques indiquent que quatre traitements au Ridomil plus"sont necessaires dans un bon programme de protection de la morelle noire contre le mildiou. Ce regime de traitement a poduit des augmentations en revenu net de USS 694 a 8.467 ha-1, selon la variete utilisee et la periode d'essai. Des resultats indiquent que le mildiou peut baisser le rendement de la morelle noire et par consequent le benefice net des planteurs de la morelle noire si les actions appropriees ne sont pas menees pour rayer les effets nefastes de cette maladie. En outre, l'utilisation des varietes resistantes ou des traitements foliaires au Ridomil plus" peut etre incorporee dans des programmes de lutte integree contre le mildiou de la morelle noire. Mots Cles: Gestion integree, Phytophthora infestans, Solanum scabrum, perte de rendement (Af Crop Sci J 2003 Vol 11 No 3 pp163-170)

Impact of fungicide applications for late blight management on huckleberry yields in Cameroon