How many insect pests are there? How much time do you have? Seriously, there is a pest for everything. Adults emerge in the spring from your garden or compost heap. Adults can lay 100's of eggs per season, in large clusters on the undersides of leaves. If you only have a few plants, check under the leaves for eggs and squish them. Once you see the adults, start dusting right away. Hand picking is really not an option, they are pretty quick. As you approach them, they scurry away......so tricky.
Most that I have seen are a darker brown than shown here. MBB is a 'Lady Bug.' There are over 400 types, and a few like the MBB eat plants instead of other insects.....so bad.
Insects can quickly defoliate bean leaves. You will need to repeat dusting until they are gone every week or so. If your plants have beans on them, pick all even the little ones before dusting. It's best to get control of them before your plants put out beans. Get your dust & be ready! Other predatory insects may help to control the larvae stage of these critters but not much for the adults.
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