Question

Sarracenia   I have a big problem with deformed leaves on Sarracenia especially on new growth. I have spotted very tiny yellow insects on the plants.  I have sprayed the plants with insectacide but struggle to get this under control.
I suspect this is a form of Trips

Answer
Thank you for the photo.  This helps me out a lot.  When I initially looked at it, my first concern was water quality.  Your plant has the signs of water with high mineral content.  You didn't mention your water source, but if you're using tap water, you will need to have your water tested for mineral content.  Ideally, you should use only low mineral water with your plants.  The brown tips to the new growth is a classic sign for high mineral water.  Fertilizer in the soil will also do this.  The soil should be a mix of peat moss and perlite only.  No compost or garden soil.

In the photo, I see emerging leaves that are curled.  This is usually caused by aphids.  You mentioned using an insecticide, but you didn't state the type and your application procedure.  If you use a topical spray, such as pyrethrin, then you'll need to spray every 7 days.  Pyrethrin will only affect the pests if it's sprayed directly on them, and the compound will breakdown within 48 hours.  

If this is an ongoing issue, I recommend using a systemic insecticide, which you can spray once every 30 days.  For information on using systemic insecticides, watch our video podcast on the topic.
http://youtu.be/lbRCdJ8ZNF0

After treating your plant, you will need to wait for new growth to fill out your plant.  The current damage to the leaves are permanent, and there is nothing you can do to reverse it.  I also recommend cutting off the leaves with brown tips.  This will provide more sunlight to the base of the plant.

If you're using high mineral water, you will also need to repot your plant in fresh soil of peat moss and perlite.  You will also need to switch to distilled water, which you can purchase at your local grocery store.

Given that you're also in South Africa, your plant should be going dormant, depending on your temperatures.  I imagine it's too warm for the plant to go completely dormant, but it is normal to see brown leaves as the daylight hours shorten.  Regardless, my first impression is damage from high mineral water and aphids.

Good growing!
Jacob Farin