1 Jan., 1902.] QUEENSLAND AGRICULTURAL JOURNAL. 63 
Gishurst’s compound, flowers of sulphur, sulphide of potassium in solution, or 
fumigation with bisulphide of carbon in the case of pot plants. As in the case 
of it, however, they do not succumb to hydrocyanic acid gas, and therefore the 
cyanide process is ineffectual in destroying them. 
Vegetable Pathology. 
MISCELLANEOUS NOTES. 
By HENRY TRYON, Entomologist. 
1. Grave Vine Anturacnose (Sphaceloma ampelinum, De Bary) on 
Isaperna Grape VINE (Vitis labrusea). 
This disease, that is so prevalent in some parts of Queensland on ordinary 
grape vines (Vitis vinifera), is less commonly met with on the varieties that 
have originated from American species of Vitzs. 
The writer, in announcing the existence of this disease in Australia in 1899 
(vide “ Insect and Fungus Pests,” pp. 165-168), stated that it had been already 
met with in this State upon “ American vines,’ Lindly, Goethe, and Lenoir. 
During the past month illustrations of its occurrence upon the Isabella vine 
have been received from HE. Smallman, he having obtained them from the 
yicinity of Brisbane. It may be mentioned also that the winter treatment 
of this formidable disease, consisting in the application of a strong solution of 
sulphate of iron, supplemented by the administration of Bordeaux mixture as 
the summer months proceed, suggested in the abovementioned memoir, has 
since been generally adopted throughout Australia, and that considerable success 
attends its employment. 
2. Grape Vine—Counure, INFerriniry. ‘ 
During the month of October several instances of the non-setting of the 
fruit of the grape or of the falling of the berry in the earliest stages of its 
growth were brought under notice. This affection is commonly designated 
Coulure, especially by those who derive their inspiration from the voluminous 
French literature pertaining to the subject of the vine, in which it forms a 
topic that receives considerable attention. Of the many causes of coulure, the 
following were illustrated by the specimens submitted :— 
(a) Defective fertilisation caused by a precocivus development of its 
own pollen that rendered the stigmatic surface of the individual 
flower inaccessible to the pollen derived from other flowers, whilst 
it served to cover it with the pollen derived from itself. This 
incident occasioning infertility was especially noticeable in grapes 
belonging to the Muscat of Alexandria, a variety of Vitis vinifera 
that is especially liable to the affection under notice—a fact that has 
served to originate a special form of preventive treatment that 
recognises the physiological cause underlying its manifestation. 
(b) Insect injury caused by the attacks on the flower of two different 
kinds of insects. A small plant-bug (Mysius:vinitor) puncturing 
the quite recently formed fruit in quest of its fluid cell contents, 
and a species of Thrips attacking the essential organs of the opening 
flower. The first-mentioned of these two latter instances of coulure 
was afforded by specimens received from a North Coast Railway 
township. The second was yielded by material derived from the 
Roma district. In both cases the supply of the obnoxious insects 
was derived from weeds, the Thrips being supplied by the florets of 
grasses flowering in proximity to the vines. Coulure that may rob 
the bunch of its entire quota of berries is often attributed to 
uncongenial climatic conditions ; but these causes operated in pro- 
ducing it less frequently than is supposed. 
