|Large white eggs and caterpillars on sea kale leaf|
The female Large White butterfly, Cabbage Butterfly, Cabbage White, or in India the Large Cabbage White lays batches of 20 to 100 yellow eggs on plants in the brassica family and can be a pest on food crops. They seem to have a preference for cultivated varieties of Brassica oleracea such as cabbage and brussel sprouts. The caterpillars are yellowish green with yellow lines and black spots and feed in groups in plain view on the leaf surface. They gain protection from predators by possessing distasteful chemicals.
Attacks are worst during hot, dry summers, but the risk period is any time from April to October. Inspect the underside of leaves for patches of yellow eggs, if found, crush the eggs. Chemical sprays can be used, but to prevent their need cover your plants with a fine netting such as enviromesh or voile net curtain.
|Broccoli · Brussels sprout · Cabbage · Cauliflower · Kale · Kohl rabi · Radish · Swede · Turnip|
|Adverse conditions||Blown sprouts · Bolting · Boron deficiency · Button cauliflower · Calcium deficiency · Heartless cabbage · Magnesium deficiency · Manganese deficiency · Molybdenum deficiency · Nitrogen deficiency · Split heart|
|Diseases||Anthracnose · Bacterial soft rot · Black leaf spot · Black rot · Brassica dark leaf spot · Club root · Downey mildew · Grey leaf spot (Brassica) · Turnip mosaic virus · Sclerotinia rot · White leaf spot · White leaf spot (Brassica) · White rust · Wire stem|
|Pests||Aphid · Cabbage aphid · Cabbage Moth · Cabbage root fly · Cabbage Whitefly · Cutworm · Diamondback moth · Flea beetle · Large White · Pigeon · Silver Y moth · Slug · Small White · Swede midge · Thrips|