Welcome to my website where I gather information about plant pests and pathogens preying on gardens in my local area in Melbourne. I want to live in harmoney with nature and so I use exclusion techniques and natural predators to protect my edible and ornamental plants instead of using poisonous chemicals...................John Ashworth 27th July 2015.
Butterflies are great pollinators. They travel
further than honeybees and are much more likely to cross-pollinate fruiting
trees growing some distance apart. To this extent, they are beneficial
insects in my garden.
Of course the downside is their larvae, whose whole purpose
in life seems to be to destroy my vegetables especially the brassicas.
Fortunately exclusion netting is an effective
way to keep them off without exterminating them in the process, and the built in exclusion frame and
netting used on my Ecobeds is particularly effective.
The only downside is that exclusion netting keeps
pollinators out of the bed as well, and if you want to save seeds you have to
consider growing a plant or two in a dedicated area accessible to pollinators.
Why Cabbage White Butterfly is a Pest.
The larvae of cabbage white butterflies can devastate
brassicas if allowed free range in your vegetable garden. To a lesser
extent they will also attack legumes and solanaceae.
Exclusion netting is my preferred cabbage white butterfly
deterrent, but if you are slack and let some through, a good second line of
defence is commercially available, environmentally friendly, Bacillus Thuringiensis
sprayed onto the plants leaves.
This soil dwelling natural bacterium produces
toxins in the guts of caterpillars when ingested, stopping them feeding and killing them in