12 



These spores germinated readily ; usually 

 from one end only, sometimes from both, 

 seldom from the side. 



When a coil of these spores is placed 

 under a cover glass in water culture, only 

 the outer spores of the coil germinate as 

 if the presence together of a large number 

 of spores prevented germination. 



21. PEAR inoculated from Gloeosporium 

 found growing naturally on the leaves of 



X400 



Fig. 26. Gloeosporium 

 spores, obtained by in- 

 oculating a pear with 

 spores found growing 

 naturally on the leaves 

 of the passion- vine. 



passion-vine. Twenty-four hours later 

 there were no indications of the fungus 

 having " taken " except that the sur- 

 rounding area was a trifle sunken. 



X400 



Fig. 25. Gloeosporium 

 from tbe leaves of the 

 passion- vine. 



Twenty-four days later a few pustules 

 were found, having well- developed spores. 

 These are shown in Fig. 26. 



22. Plum inoculated with the Gloeo- 

 sporium of the apple. After five days the 

 plum was well infested. 



23. Spores from the foregoing inoculation 

 were used to inoculate a tomato of the 

 yellow variety. After ten days the tomato 

 was well infested. The pustules were 



X 400 pi 



Fig, 27. Spores of a Gloeosporium 

 found growing naturally on the tomato. 



small and close together, and the outbreak 

 of the spores seemed to be considerably 

 delayed by the nature of the skin of the 

 tomato. 



24. An apple was inoculated with the 

 Gloeosporium found growing naturally on 

 the pepper. After fourteen days the apple 

 was well infested. 



Ripe-rot Fungi found growing naturally on various kinds 

 of Vegetation. 



Ripe-rot fungus on the Banana. (See Fig. 45.) 



The following facts were noted with reference to a specimen bunch of 

 bananas sent from Byron Bay, and said to be failing to set and ripen. 

 As soon as the fruits reached a length of about three inches, and 

 sometimes earlier, they began to change colour and to shrivel, passing 

 through greenish-yellow, yellow, brown, or French grey, to almost 

 black. At the brown stage the colour became pruinose, and the final 

 blackening was accompanied by a pink eruption of Gloeosporium spores. 



The spores occured on all parts of the fruit, but in the specimens 

 figured they were most abundant on the basal half, being particularly 

 abundant at the very base of the stem. (See Fig. 45.) 



The disease extended to the entire bunch, which in consequence was 

 rendered worthless. 



No other disease-producing organism was to be seen on the speci- 

 mens sent, which included most of the middle part of a bunch. 



The sender wrote that he felt certain that cold weather had nothing 

 to do with the matter. It was apparent that the disease had attacked 

 the fruit at an early stage of its existence. 



Later the fungus fruited freely on the main stem of the bunch of 

 bananas. The facts observed seemed to establish the ability of the 

 fungus to completely prevent the fructification of the banana. 



Ripe-rot fungus on Hawthorne. (See Figs. 28, 29, 30.) 



The Gloeosporium of the hawthorne was found growing naturally 

 on the fruits of Crataegus oxyacantha in the middle of the month of 

 June, near Sydney. 



'The pustules, which often covered the entire fruit, were about one- 

 tenth of a millimetre in diameter, and gave to the surface of the fruit 



