142 



PAGE 



Sell izuiuura lanlycra 122 



Sedge and gooseberry rust 93 



Seed coat ' 42 



Seeds, germination of 42 



maturing of 40 



Seed potatoes 78, 80 



reproduction 3 



Seeds, vitality of 41 



Seedlings " d'^amping off" 61 



Seedlings 44 



Selection, natural 44 



Self-fertile flowers 38 



pollination 37 



sterile flowers 38 



Septoria lycopcrsici 84 



Seven-spot Ladybird 131 



Silkworms, Pebrine in 135 



Siphonophora (Rose Aphides) 122. 123 



Skylark 98 



Sleei^y disease of tomatoes 84 



Slightly diseased tubers, effect of 



planting 78 



Slugs 101, 130 



natural enemies of 103 



Slug, carnivorous 130 



Smoky atmosphere, effect of 54 



Snails 101 



natural enemies of 103 



Sparrow, hedge 129 



house 98 



Sphaerotlieci pannosa 87 



Spongosp)ora Solani 72 



Spores of Cladosporium fiilvum ... 84 



Plasmodiophora 67 



Sporidia from teleutospores 92 



Sports 45 



Spraying of potatoes 79 



with lead arsenate ... 108 

 109, 110. Ill 



with nicotine 112 



wdth soft soap 112 



Spring spraying 125 



Soft soap spraying 112. 123 



with quassia 125 



Soil, acidity of 11 



bacteria of 12, 13 



Soils, chemistrv of 12 



Soil disinfectants 83. 86 



'Soil, partial sterilisation of ...14. 64, 



83, 101 



phvsical condition of 10 



spores of fungi ... 63.64. 68, 82 



Soot for Cabbage Root Fly 117 



and Lime for Slugs 102 



for Onion Flv 118 



Starling 98, 99, 103, 114 



Steam, for sterilising soil 14 



Stem Eelworm 99 



function of 18 



Sterilisation of soil 64, 83, 101 



Stocks, insect enemies of 116 



PAGE 



Stomata 21 



Storage of potatoes 76 



Strawberries, Eelworm s attacking 100 

 Insect enemy of ... 131 



Straw^berry snail 101 



Subsoil .\ 15 



Sulphate of Potash for Eelworms 100 



Swallow 129 



Sw^edes, Fingers-and-Tues " in ... 65 

 Swedes, insect enemies of ... 116, 122 



Sweet Pea 39 



Sweet Peas ciossed 47 



Swift 129 



Swift's arsenate paste 108 



Swimming spore? 63 



Symptoms of wilt in Asters 81 



Syjichytriiim endobioticum 70 



Syrphidae 132 



Teleutospores of Puccinia 



niah'actarion 95 

 of wheat rust ... 90, 91 



Tendril 19 



Testacellu 130 



Theobald quoted 102, 114, 125 



Thrips Ill 



Thrush, Mirtle 129 



song 98 



Thysanoptera Ill 



Tipida oJcracca 113 



Tits 98, 129 



Toluene, for sterilising soil 14 



Tomato, leaf rust 83 



pollination of 37 



Tomatoes attacked bv Eelworms 100 

 by White Fly... 127 



Transpiration 8. 23 



Transplanting 24 



Traps for Earwigs 107 



for Leather Jackets 114 



for \Yire worms 112 



''Tree Tanglefoot" 109, 125 



Trenching 15 



Trombididte 103 



Tsetse flies 113 



Tubers 4. 26 



Tulip 28 



Turnip Aphis 122 



Fingers-and-Toes " 65 



structure of healthy root 66 

 Turnips, insect enemies of ... 116. 122 

 Turf Traps for "Leather Jackets " 114 



Twdners 18 



Tylenchiis devastatrix 99 



L^redospores of wheat rust 90, 91 



Variation in plants 44 



