14 



:and the soil in which they are planted is properly drained md aerated, I do 

 not think either native or imported varieties will suffer from foot-rot. 

 I have seen trees which were planted too deeply, suffering from so called 

 foot-rot, until all the leaves had dropped off and 90 per cent, of the roots 

 had died, recover their health and become vigorous healthy trees, sim- 

 ply from being lifted and p'anted high. Examples of this can be 

 seen at Hope Gardens 



Insect Pests — Whenever an orang 3 tree becomes infested with scale in- 

 sects, it is time to 1 >ok at the roots; deep planting, insufficient drainage 

 or damage to the roots in some way, is usually responsibl t for a Oitrus tree 

 being badly infested with insects No wash or so called insecticide in 

 this world will rid a tree I insects and mike it healthy if its roots tire 

 left in uncongeni il soil. The only imported vtrietyof Citrus th it 

 appears to be more liable to a f tacks of seale insects than are o ir na- 

 tive varieties, is the Walter's Royal Pom do. 



Manures. 



Mr. Cousins sai I there was such a vast amount of plant food in the 

 soil of Jamaica that there were only a few instances in which it was 

 necessary to use manure It was known that nitrogenous manures 

 assisted in increasing the vegetative part of the tree, while phosphoric 

 manu-es aided the reproluctive parts. In northern climates it was 

 necessary to manure trees so as to build up wood to withstand the 

 effects of frost, but in this climate it was better to devote all their 

 energies to cul ivatim Plant the trees high and see that they had 

 good drainage and proper care. 



Mr. Sharp asked if he was right in saying that artificial manure was 

 the reverse of beneficial to young trees. 



Mr. Cousins said it was. 



Mr. Levy asked if Mr. Cousins meant that farm-yard manure was in- 

 jurious to the orange. 



Mr. Cousins said it would be in the case of young trees, but thought 

 it would be beneficial to fully grown ones. 



Mr. Sharp said it was necessary to starve trees to get fruit early. 

 They did not want to get more fruit from the trees. On the contrary 

 they suffered from having too many. It was to regulate the size of 

 ^he fruit and the time of fruiting that they were endeavouring. 

 Insects and other Pests of Citrus Trees . 



By E. Stuart Ponton, Ass : stant i Curator of the Institute of Jamiica. 



In commencing this piper on the pests of citrus trees, it will be well 

 to allude tothegre.it a Iv mtaga th it must result from the pracvi • 

 tionary steps taken bv the Grovernmeit to saf ^giard the chrus and 

 other horticultural and agricultural interests by making one port only 

 responsible for the importation of plants and seeds, and providing for 

 their fumigation, thereby lessening the danger of importing new pests 

 which often prove more harmful than those already existing in mi 

 native to a given area. 



In view of the great impetus recently given to citrus culture in Ja ■ 

 maica, and the important position that the industry is likely to assume 

 in the future, it is of great moment that the grower should be able t o 

 oombit effectively the pests that will assail his trees. 



It appears to have been the general experience with those having to 



