common occurrence in the genus Nectria for the ascigerous 

 stage to be produced after the substratum is dead and after 

 the work has been done by the fungus in its conidial 

 phases. 



Howard: West. lnd. Ball., Vol. II., p. 200. 



STOCKDALE: West lnd. Bull., Vol. IX., p. 171. 



NECTRIA BAINII, Massee. 

 (Cacao Pod Disease). 



The fungus was reported to be doing damage to pods of 

 cacao in Trinidad in the year 1898. Semi-circular blotches 

 make their appearance on the surface of the pod, and these 

 parts become soft and watery. Later on, an orange- 

 coloured mycelium appears, and this becomes studded 

 with bright red perithecia. The perithecia are said to be 

 frequently preceded by Fusarium-\\k& mould which is 

 whitish in appearance ; experiments conducted at Kew 

 have led to the conclusion that the ascospores give rise to 

 a Cephalosporium-ioxm after germination. The parasitism 

 of the fungus requires further investigation. It is scarcely 

 possible to suggest remedial measures until the mode of 

 life of the fungus is known ; spraying with a suitable 

 fungicide may be efficacious in checking the spread of the 

 disease. 



Diagnosis. — Perithecia gregarious, beset by a yellow or 

 orange-coloured mycelium, spherical, red, 300-350 microns 

 diamr. ; asci cylindric-clavate, shortly stalked, 8-spored, 

 80-90 by 7-9 microns ; spores elliptic-oblong, acute at both 

 ends, uniseptate, hyaline, 10-12 by 5 microns. 



MASSEE : Kew Bulletin, 1899, P- I - 



Hart : West lnd. Bull., Vol. I., p. 422. 



F. C. VON FABER : Die Krankheiten und Parasiten des 

 Kakaobaumes, p. 216, 1909. 



NECTRIA IPOMOEAE, Hals. 



(Stem Rot of Sweet Potato.) 



The sweet potato and the egg-plant have been reported 

 to suffer with this disease in New Jersey. The disease 

 commences near the ground-line and then spreads into the 

 stem and roots. The stem withers and becomes covered 

 with a white mould, the Fusarium condition of the fungus ; 

 later on, clusters of flesh-coloured perithecia make their 

 appearance on the diseased stem. 



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