You will most likely find them underneath the leaves. How to Get Rid of Sawflies Natural and Organic Solutions. Larvae The sawfly larval stages are plant feeders and look much like the caterpillar of butterflies and moths . Conventional insecticides such as malathion are also effective. Smoosh Them. However, you can use precise natural methods to eliminate all the sawfly larvae near you from home. Please check out our sawfly larvae control products for more details about how they work and how, when, where they should be applied. Below are some of the solutions that work best: One of the most common ways to get rid … When sawfly larvae multiply, it isn’t easy to get rid of them naturally. The control and elimination of sawflies are possible through natural solutions that do not pose harm beyond its target. Get some gloves and go over your rose petal leaves. Simply rub your fingers over each leaf, and smoosh any you come across. This control also repels the adult sawfly and many other insects. You must try several techniques until you find the most suitable one for your sawfly larval infestation. The natural insecticide spinosad will control sawfly larvae. Safer ® Brand offers a variety of sawfly larvae control products to help control and eliminate this garden pest and revive your plants. The best time to control sawflies is early in their larval stage. Soapy water effectively gets rid of sawfly larvae. Bt (Bacillus thuringiensis), which is an effective natural control for true caterpillars, is ineffective on sawfly larvae. So how do you kill sawfly larvae naturally, without pesticides? This is one of the easiest methods to get rid of them (though it is kinda gross). Sawfly larvae will either feed inside or on the outside surface of plant leaves and stems or inside a gall that is produced when the female stings the plant leaf or stem.