XVlll 



LIST OF ILLUSTRATIONS 



Fig. 

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59 

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63 

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79A 



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No. Page 



Diplodia Rot of Cacao Pod .... to face 158 



Cacao Canker produced by inoculation . . . ,, 160 



Cacao Pod Rot : Tip infection ....,, 160 

 Cacao Pod Rot, produced by inoculating stem . „ 162 



Phytophthora Faberi , . . . . 163 



Surinam Witch Broom Disease .... to face 168 

 A Typical Witch Broom . . . . . 169 



Surinam Witch Broom Disease .... to face 170 

 Monilia Disease of Cacao (Ecuador) . . . ,,174 



Sphgeronema Black Spot (Ecuador) 

 Colletotrichum Cradwickii, Flower Proliferation (Male 



Cacao) Trinidad ..... 



Flower Proliferation (Male Cacao), Trinidad 

 Pods from Male Cacao Tree .... 



Red Ring Disease : Fully infested tree . 

 Sections of Stem of tree in Fig. 00 at ift. gin. and 3ft. 6in. 

 Red Ring Disease, Medium Section of Infested Tree 



Longitudinal Section of Segment of Stem 

 Transverse Section of Segment of Stem 



„ ,, Section near upward termination of 



Ring 

 „ Infestation of a young leaf 



Effect of a Bud Rot epidemic, Trinidad 

 Coconut Bud Rot, outer leaves removed to show collapse 



of heart leaves ..... 

 Bud Rot, preceded by drooping of leaves (Tobago) 

 Phytophthora Bud Rot (Jamaica), central leaves alone 

 dead and broken 

 „ ,, advanced stage, central column 



fallen out 

 Gumming of Coconut Stem 

 Little Leaf Disease of Coconut 

 Red Root Disease of Lime (Dominica) 

 Anthracnose of Lime 



Scab on Lemon Shoot 



Foot Rot on old seedling Orange Tree (a) Margin of 



Rot indicated by chalk line . 

 (b) Treatment in progress 

 Canker on Grape Fruit 

 Canker on Leaves, showing pale zone around the spots 

 Canker on Young Twig 

 American Leaf Disease of Coffee 

 Brown Eye-spot of Coffee . 

 Anthracnose of Avocado 

 ,, Mango 

 „ ,, Mango Fruit 



,, Mango Leaves 

 Macroconidia of Fusarium Vasiniectum 

 Panama Disease, Early symptoms 

 Advanced stage 

 „ „ Longitudinal Section of a bulb and 



base of the stem 

 , , Young Sucker infested from parent 



plant through the neck 

 Moko Disease of Banana . 

 Tylenchus Similis .... 

 Cercospora Musarum 

 Bonnygate Disease of Banana 

 Sphsrostilbe Musarum, Conidia, Ascus and Ascospores 



174 



176 

 176 

 178 

 178 

 180 

 180 

 180 

 180 



180 

 180 

 184 



„ 186 

 „ 186 



.1 190 



>> 190 



192 



, 192 



203 



to face 204 

 204 

 204 



,, 210 

 „ 210 



212 

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 212 



„ 226 

 228 



.. 236 

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.. 236 

 242 



to face 242 

 242 



.. 244 



» 244 



.. -48 



249 



, 251 



to face 252 



253 



