PAGE 



Pea Thrips Ill 



Peas, insect ertemies of Ill 



Pear, insect enemies of ... 108, 109, 114 



Pear Midge 114 



Peat, bacterised 13 



Pebrine in silkworms 135 



Peony 3 



Perennials 3 



Phosphoric Acid, importance of ... 14 

 PJiytophthora compared with 



Phythium 75 



Pliylophtltora, conidia 74 



disease in Asters 81, 83 

 growth from diseased 



tubers ... 77 



hibernation 77 



infestans 73 



initial infections ... 77 

 resting spores on 



artificial media 77 



Pier is brassicae and P. rapae 107 



Pine-rust 93 



Pipit 129 



Plant Lice 121 



Plasmodiophora Brassicae 65, 66 



Plasmodiophora compared with 



Pythium 67 



Plover 129 



Plum Aphides 122, 124 125 



Plum, insect enemies of 108, 122 



Pollination 37 



Potash, importance of 14 



Potato 26 



cut for "sets" 27 



disease, resistant varieties 79 



disease 73 



grown in the dark 27 



attacked by Wireworms ... 112 



attacked by Millipedes ... 131 

 Black Scab or Wart 



disease 70 

 Potatoes, Black Speck or Violet 



Rhizoctonia disease 71 

 control of scab diseases 

 Brown Scab or Ordinary 



Scab ...... 72 



mechanical irritation 72 



Spongy or Powdery Scab... 72 



storage 76 



Precautions against late blight 



disease 78 



Predaceous Insects 131, 132 



Primrose, Jack-in-the-Green 51 



Pruning 34 



Pruning against "big bud" 104 



Pruning against Currant Aphides 125 

 Pythium compared with Plasmodio* 



phora 67 



Puccinia graminis 90 



menthae 94 



Aecidiospores in 94 



PAGE 



Puccinia menthae 



Teleutospores in 94 



Uredospores in 94 



2'ulvinaria vitis 127 



Pupa 105 



Puparium 113 



Psylla mali 126 



Pythium compared with Pliytoph- 

 thora, 75 



Pythium de Baryanum 61 



Life History ... 61, 



Pythium, resting spores 63 



reproduction 62, 63 



Quassia and Soft Soap spraying ... 125 

 Quicklime as a fungicide 69, 70 



Radishes, insect enemies of 116 



Recessive characters 46 



Red currant, layering of 29 



Red Spider 103 



Reproduction, vegetative ..:. 25 



Respiration of plants, see breath- 

 ing 



Resting filaments of cercospora 



melonis 85 



Resting spores 63, 68 



Retarded crowns 36 



Rhizoctonia molacea 71 



Rhopalosiphon ribis 122, 123 



Ridging 16 



Ringing 30 



Robin 98 



Rook 98, 99, 114 



Root, absorption by 9' 



cuttings 31 



hairs : 10 



pressur.3 9 



pruning 34 



tips> sensitiveness of 4 



tubercles , 12 



Rose Aphides 122, 123 



Rose mildew 87 



Rotation of crops 15 



Rotation of twining stem 19 



Runners 29 



Russell, E. J 14 



Rust of wheat 90 



Rust on gooseberry 93 



Rust resistant wheats 93 



Rusts 89 



Ruston, A. G 56 



Sandflies 113 



Saprophytes 60 



Sawfly 110, 130 



Scale Insects 127 



Enemies of 129, 132, 133 



Scattering of spores 59 



