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Effect of Seeding Date on the Performance of Grasses and Broadleaf Species Evaluated for Cover Crop Management in the Breede River Valley Wine Grape Region of South Africa

Autor: F.J. Calitz, P.J.E. Louw, J.C. Fourie

Publikováno v: South African Journal of Enology & Viticulture. 27

The trial was conducted over a period of two years on a medium-textured soil near Robertson (33°50’S, 19°54’E), situated in the Breede River Valley of the Western Cape. The effect of seeding date on the dry matter production (DMP) and weed cont

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a00838589e26505665f18f93f70baeae
https://doi.org/10.21548/27-1-1473

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Field tolerance of selected varieties to and fungicide efficacy against Alternaria blight of sweet potato

Autor: A.H. Thompson, Sunette M. Laurie, S.D. Kandolo, Theresa A. S. Aveling, M. Truter, F.J. Calitz, J. E. van der Waals

Publikováno v: African Crop Science Journal; Vol 24, No 3 (2016); 331-339

Alternaria blight (AB) of sweet potato ( Ipomoea batatas L.), caused by Alternaria spp., was recently reported in South Africa, but is common in southern and eastern Africa. Elsewhere in the world, AB is controlled primarily using resistant varieties

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a6dcc238534cd98e899a873230d8027
https://www.ajol.info/index.php/acsj/article/view/142980

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The effect of poor quality seed and various levels of grading factors on the germination, emergence and yield of wheat

Autor: A. Barnard, F.J. Calitz

Publikováno v: South African Journal of Plant and Soil. 28:23-33

High quality seed is essential for establishing productive stands of wheat. Seed should have, amongst others, a high germination percentage, be free of seed borne diseases and should not contain any weed seed. Protein content (PC), hectolitre mass (H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2978ad7921c4aa21dc8937ba20333f38
https://doi.org/10.1080/02571862.2011.10640009

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Spray deposition and control of Botrytis cinerea on grape leaves and bunches: part 2 (Wine Grapes)

Autor: J.C. Brink, F.J. Calitz, P.H. Fourie

Publikováno v: South African Journal of Enology and Viticulture, Volume: 37, Issue: 2, Pages: 157-168, Published: 2016

Poor control of fruit and foliar diseases in vineyards is often attributed to insufficient spray deposition of susceptible tissue. To optimise spray deposition, a deposition assessment protocol using fluorometry, photomicrography and digital image an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffa9f9fa9ae29ae7e4f1829a5802704e
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2224-79042016000200011&lng=en&tlng=en

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Insecticidal control of Melanterius servulus (Coleoptera: Curculionidae), a potential biocontrol agent of Paraserianthes lophantha (Leguminosae), in commercial seed orchards of black wattle, Acacia mearnsii(Leguminosae)

Autor: F.J. Calitz, I.M.R. Van Aarde, D. Donnelly

Publikováno v: Bulletin of Entomological Research. 82:197-202

A seed-feeding weevil, Melanterius servulus Pascoe, is considered suitable for release against the weed Paraserianthes lophantha. However, host specificity tests have indicated that M. servulus may also develop on the seeds of Acacia mearnsii (black

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e96bdbc7330cb93458af259fb72a9acf
https://doi.org/10.1017/s0007485300051725

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Effect of Colonization of Pear Stigmas by Pseudomonas syringae pv. syringae on Fruit Set

Autor: E. Lucienne Mansvelt, F.J. Calitz

Publikováno v: HortScience. 29:74-75

Packham's Triumph' (Pyrus communis L.) pear blossoms were inoculated with Pseudomonas syringae pv. syringae van Hall upon emasculation and then hand-pollinated at different times to assess the effects of bacterial colonization on fruit set. The patho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a123ad7aa23b49cc8ba0bbd6e527080f
https://doi.org/10.21273/hortsci.29.2.74

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