204 Glomerella cinsrulata and its Conidkd Forms 



■» 



latex exudes in tiny drops. Larger fruits could not be inoculated. When 

 the strain that produces only the Gloeosporium stage was used for 

 inoculations, Glceosporium acervuli were developed on the infected 

 tissues, but if the perithecial strain was used, generally either immature 

 perithecia or sclerotia were formed, rarely acervuli. 



Pods of Dolichos lahlab and Vigna catjang take the infection through 

 wounds. At times, the infection at first remains localised for some days 

 and then spreads further. 



Mature fruits of tomatoes and brinjals have been inoculated through 

 wounds. As the result of the inoculation soft rot was produced. Brinjals 

 were inoculated with the Gloeosporium form and the perithecial. In 

 both cases Gloeosporium acervuli were produced. 



Inoculations with apples have been partially successful as stated 

 above. Ripe fruits of peach have been successfully inoculated with the 

 perithecial form. Gloeosporium acervuli were formed. 



Small plants of sweet peas inoculated by bruising the epidermis 

 wilted and developed Gloeosporium acervuli in about ten days. 



Inoculations through punctures on fruits of Citrus sp. produced a 

 sort of a wet rot in about a week. Gloeosporium acervuli were developed 

 in the brown rotting tissues. 



Inoculations on onions {Allium sp.), sugarcane and jowar leaves, 

 mango fruits, pods of Phaseolus vulgaris, have been unsuccessful. 



Anthracnose of Carica papaya. 



On this host the disease is to be found on flowers, fruits and flower- 

 stalks. It has not been observed on leaves and on living stems at Pusa, 

 though Colletotrichum sp.^ has been recorded on leaves and stems, and 

 also on fruits in Barbados. 



Diseased flower-buds do not open but turn brown, become dry and 

 soon fall off. The diseased parts are punctuated by small dots which are 

 at first pink in colour but later they turn black or brown. If the infection 

 takes place when the floral whorls have opened, the diseased floral leaves 

 turn brown and wither. From these leaves the disease nuiy travel to 

 the base of the ovary and to the flower-stalk. 



The most critical period when the fruits get infected is when they 

 are newly set, when the pale whitish yellow colour is still persistent 

 and when they are not in latex. A considerable amount of damage is 

 also done to the fruit after it has turned distinctly green and after the 

 laticiferous tissues are developed. Such fruits are generally infected 



^ Af/rlcultural News, xiv, No. 341, p. 174, lOlf). 



