Club Root & Butterfly Eggs
Birds can cause an array of problems including eating seedlings, buds, leaves, fruit and vegetables.
Protect the plants from birds by covering them with netting or fleece. Scarecrows will deter birds temporarily.
Roots become swollen and distorted, and leaves become pale and yellow and wilt easily. Plants may die.
Improve drainage and add lime to make soil more alkaline. Do not grow in affected soil.
A number of caterpillars will feed on brassicas, but the most common are those of cabbage white butterflies. You will usually see the caterpillars, if not, you will see the holes they make in the leaves. They will also bore into the heart of cabbages.
In mild attacks, or if you have only a few plants, you may be able to pick the caterpillars off. You can spray with pyrethrum, deltamethrin or lambda-cyhalothrin. Insect-proof mesh or fine netting (5-7mm mesh) can prevent egg-laying.