19 



from penetrating into the plantations. For a long time it 

 was believed that the best results were obtained by water- 

 ing the seed-plots and the young plants with an infusion 

 of tobacco and by the growing hedges around the plan- 

 tations in the plains (on slopes it is difficult to protect 

 the plants by hedges), but this method has been abandoned 

 and strongly manuring the coffee-trees has been tried. 



However, none of those remedies has been of much 

 avail; the disease continues to destroy plantations and 

 many a planter has been ruined, especially those who 

 have their plantations in poorer grounds and in the 

 plains. Trees in the mountains, and planted in plots full 

 of vegetable-mould, resist the disease, and if they are at- 

 tacked, they do not suffer so much. 



Coffee-trees have also much to endure from a louse 

 which causes leaves and branches to turn black, this 

 being the origin of the name of ,, black rust" given to this 

 disease. 



A disease caused by miscroscopic insects which 

 attack the roots of the coffee- trees, and in a short time 

 do considerable damage is called the „Aaltjesziekte." The 

 „konuk" and the „Ooret", a kind of scaraboes that attacks 

 the roots of the coffee-trees, is another insect, called the 

 jjkoffieborer", which destroys the trunk. 



§ 10. Productions. 



The coffee-culture in the isle of Java is practised 



