Cabbage White Caterpillars can decimate a vegetable plot, especially brassicas or ornamental beds, especially nasturtiums. The Large Cabbage White feeds mainly on the outer leaves leaving holes and sometimes completely stripping leaves. The Small Cabbage White feeds mainly on the hearts of cabbages and other brassicas. By the time that the fruit is ready for picking the Gooseberry Sawfly can completely strip the leaves of the fruit bushes leaving them severely weakened and producing a poor crop the following year.

The Codling Moth feeds on the core of the fruit of apples and pear and to a lesser extent walnut and quince. When they have eaten the fruit they exit leaving a small reddish brown hole in the skin with brown droppings know as frass. Upon cutting the fruit open you may find that there is very little left that can be eaten.

Nemasys Caterpillar and Codling Moth Killer is the simple solution to control caterpillars. To control caterpillars apply as soon as the caterpillars are first seen applying to all leaf surfaces where the pest is present. Make sure to spray pests with a solution as caterpillars not directly sprayed will not be controlled. To control Codling Moths apply September to October to the trunk of the tree/main branches and to an area of soil equal to the tree cover above.

Wet the area before applying the nematodes and apply with a pump sprayer so that all areas are treated. The pack contains sufficient for two further applications at 5 to 7 day intervals, this ensures that all hatchings are targeted.

The nematodes (Steinernema carpocapsae), attack the pest by entering natural body openings. Once inside, they release bacteria that stops the larvae from feeding, quickly killing it and breaking the pest's lifecycle.