CHAPTER 11 - The Best Control 2

Terminalia catappa L. (T. moluccana Lam.; Indian almond).Juice of young leaves was employed in Southern India in anointment for scabies; commercial ext.effective repellent to Japanese beetle.Theobroma caco L. (Cacao; cocoa).A chocolate manufacturer mentioned an odd experience in connection with disposal of cocoa shells.Some shells were used as bedding for dogs, later the keeper credited the shells with having causedthe disappearance of fleas infesting the dogs.Tilia tomentosa. (Silver linden tree).Powders and volatile constituents of flowers T ants.Tragia sp.Insecticidal plant occurring in Nicaragua.Trichilia cuneata Radlk.Infusiuon of leaves T itch mites and other parasites of skin.Tripterygium wilfordii. (Chinese thunder god vine).Roots T codling moth and several other lepidopterous insects.Triticum sp. (Wheat).Used as insecticide against red spider.Tropæolum majus L. (Common nasturtium).Acetone ext. of leaves and stems T mosquito larvae.Tylophora fasaciculata Ham.Leaves and roots T rats and other vermin.Umbellularia californica (Hook. and Arn.) Nutt. (Orodaphne californica Nees.; California laurel).Leaves appears to be valuable repellent to fleas.Urtica lyallii (Wats). (Sap from nettles).Vanilla planifolia Andrews. (Vanilla bean).20% T body louse.Vateria indica L.An efffective and cheap viscous adhesive for banding to prevent ants from reaching crowns of treeswas prepared with 10 oz. powdered Manila gum copal (gum of this species), 1 pt. castor oil, and 1 oz.beeswax.Veratrum album L. (White false-hellebore).T roaches and silkworms. This plant is a hardy herbaceous perennial of the lily family. Early Greeksused to mix with milk to kill flies. Early Romans used this plant against mice and rats. It controls leafeatinginsects.Veratrum viride Ait. (V. album viride Baker; American false-hellebore; green hellebore).This species contains alkaloids which are very toxic to a number of insects.Veratrum spp.Powdered roots (V. album and V. viride) have been proved to prevent the emergence of housefliesfrom horse manure, being 95.5% T maggots exposed to its action. See tobacco note in this Chapter.Verbascum phlomoides. (Clasping mullein).Acetone ext. of flowers T mosquito larvae.Verbascum thapsiforme. (Wool mullein)Acetone ext. of flowers T mosquito larvae.Vernonia anthelmintica (L.) Willd.Bruised seeds employed as means of destroying pediculi.Vetiveria zizanioides (L.) Nash. (Andropogon zizanioides Urb.; cuscus grass; vetiver).In Gold Coast, Africa, dried roots of grass when placed among clothes, prevented insect attack; anointment prepared from oil was employed in removing pediculi from hair; roots used as insecticide.Vitex negundo L. (Negundo chaste tree; nochi).Leaves scattered among clothes are said to preserve them from attack by insects; 5% alch. ext. ofleaves 90% T Plutella maculipennis, 50-75% T Prodenia litura, 20% T Crocidolomia binotalis, and100% T Euproctis fraterna, Pericalia ricini, and Achaea janata.Walsura piscidia Roxb. (Trichilia trifoliata Wall.).Arabs used fruit in hair wash to kill vermin and in an ointment to cure itch.Weeds. (Species not stated.)Powder kills mechanically rather than by poisoing larvae of mosquito.442