part of my yard is being ravaged by these little buggers.

anybody know what they are and how to get rid of them.

thanks in advance.

White oil that you can probably purchase at Home Pro or very easy to make your own by the following;

Home Made White Oil

It is easy to make your own white oil from vegetable oil and liquid soap. Prepare the concentrate using the proportions below. Store in a suitable container. Label the container, making sure to include the dilution rate on the label for quick reference.

Ingredients

1/2litre of vegetable oil (any brand)

1/2cup Sunlight dish washing liquid

Dilution

Dilute the above mix by placing 1 tablespoon into a litre of water. Mix well and spray thoroughly over both sides of the foliage and onto the offending pest.

The contents of the stored concentrate will separate over time. Simply ensure that the concentrate is well mixed each time before you attempt to dilute it for use. Spray as often as required.

Use

Oil based sprays are useful in controlling a wide range of insect pests and mites. In most cases the oil covers the body of the insect or mite, causing it to suffocate. Scale, aphids, pimple psyllids, mites and even young grasshoppers can be killed by contact with the oil. In the case of citrus leaf miner, the shiny oil coating on the leaves repels the moth responsible for laying eggs on the new leaves of citrus plants. These eggs quickly hatch into larvae that tunnel between the upper and lower surfaces of the leaves causing the characteristic silvery trails and distortion of the leaves.

Precautions

Always following the directions as to the dilution rate as oil-based sprays can burn if applied in strong concentrations. Do not apply in hot weather. Do not use on plants with hairy leaves, ferns or palms and reduce to half strength on native plants with fine foliage (eg leptospermums or tea trees). These precautions apply to home made preparations as well as commercially available oil sprays. Commercially available preparations are generally petroleum-based products and their use is not permitted under organic certification.

It looks like Lerps and Physids to me , if not scale. I would follow Beentheredonethat's advice with the white oil /vegetable oil.

My Thai woman say, it are the young long one from butterfly.

Gerard.

My Thai woman say, it are the young long one from butterfly.

Gerard.

Do you mean caterpillars? If so, you would see caterpillars around if they are the problem.

There are caterpillars on the leaves, but they are somewhat hidden. These small caterpillars bite off parts of the leaf and cover their bodies with these leaf parts, thus building protective cases in which they are hidden.

These caterpillars als from so-called Microlepidoptera, but (at least to me) it is not possible to determine which species they belong to...

Erwin