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 Butterfles are 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.
The best deterrent for caterpillars is exclusion netting. My Ecobeds have built-in frames and attachments for easy mounting of exclusion netting.
If the butterfies get past your defences, spray the crop thoroughly with Bacillus thuringiensis (Dipel in Australia) This
natural soil dwelling bacterium once ingested by the caterpillars produces toxins which
paralyse their digestive system causing them to stop feeding. They die within a few days