Brassica Reference Manual - Agricom
Brassica Reference Manual - Agricom
Brassica Reference Manual - Agricom
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4. <strong>Brassica</strong> Crop Husbandry<br />
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Condition Impact on plant Control<br />
Fungal Diseases<br />
Clubroot<br />
(Plasmodiophora spp)<br />
Ring spot<br />
(Mycosphaerella brassicicola)<br />
Fungal blackleg<br />
(Leptosphaeria maculans)<br />
Sclerotinia stem rot<br />
(Sclerotinia sclerotiorum)<br />
Leaf spot<br />
(Alternaria spp)<br />
Black rot<br />
(Xanthomonas campestris)<br />
Nutrient deficiencies<br />
Brown heart<br />
Photo unavailable<br />
Causes irregular swelling, wilting, stunted growth,<br />
plant death.<br />
Small dark lesions and dark sooty mould on leaves, may<br />
lower yields.<br />
Whitish spots and patches on leaves containing small<br />
black spots, development of cankers at base of stem,<br />
plant death.<br />
White lesions and white cottony growth in wet weather,<br />
black sclerotia form inside stem, wilting and stem death.<br />
Small dark spots on older leaves in cool wet conditions.<br />
Attack on vascular system in warm, humid conditions,<br />
yellowing of leaf margins, wilting, leaf loss.<br />
Boron deficiency, swedes and turnips<br />
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4. BRASSICA CROP<br />
HUSBANDRY
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