FOR two decades, what could probably be a revolution in the production of environmentally-sound pesticides—worldwide—is sitting quietly, awaiting registration. Invented by Pune-based M.N. Sukhatme, the herbal pesticide Indiara has already been successfully tested across the globe, and the testimonials are flattering. The California-based Hemispheres Inc. wrote to Sukhatme: "We have used Indiara in our gardens, both on tent caterpillars (ferocious defoliators that were beginning to infest our apricot tress) and aphids (infesting buds and new stems on some of our rose bushes). In both cases it has taken a three per cent solution for about 90 per cent control." That was 10 years ago.