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ENTOMOLOGICAL NOTES. 



BOARD OF AGRICULTURE AND FORESTRY. 

 Division of Entomology. 



By Jacob Kotinsky. 

 PRINCIPAL CITRUS INSECTS IN HAWAII. 



INTRODUCTION. 



As yet these Islands can not boast of very numerous or very 

 thrifty orang-e, lemon, or other citrus orchards with the pos- 

 sible exception of limes. Economic conditions have thus far 

 barred the undertaking of citrus culture on a commercial 

 scale. Citrus culture is nevertheless even at present a sub- 

 ject of no little importance on these Islands, to say nothing 

 of its future prospects. Scarcely a door yard but is stocked 

 with one or more trees of the citrus tribe. Though we do 

 depend upon California for oranges and lemons to a consid- 

 erable extent, our own supply fills an important place. But 

 for an abundance of seed and not so attractive color, it is 

 conceded that the native orange excels the imported article. 

 In many Hawaiian homes the native orange is given first 

 choice for private family consumption, although the Califor- 

 nian may be served in the presence of guests. Although not 

 much in evidence in our markets at present, we feel keenly 

 a scarcity of our native orange whenever it occurs. It thus 

 becomes evident that by giving these trees the attention they 

 require we should follow a wise course. 



UNINTENTIONAL INSECT IMPORTATIONS. 



Whatever the condition of our citrus plants years ago, they 

 are at present beset with a number of foes, among which in- 

 sects play an important part. Indiscriminate importation of 

 plants from all over the world without inspection naturally led 

 to the establishment of numerous pests. It is an established 

 fact that all the insects affecting citrus plants in the Terri- 

 tory are of foreign origin. Practically all of them are of uni- 

 versal distribution, having followed the citrus plants about 

 the world. Some of the insects are confined to certain citrus 

 districts of the world. We may be consoled, perhaps, by the 

 knowledge that many well-known pests of the citrus are not 

 A'-et in the Territory, whether this absence be on account of 

 unsuitable climate or other unknown causes. Our present 

 system of rigid inspection of incoming vegetation promises to 

 limit our citrus pests to what we have already acquired. And 

 so long as this system is continued we may rest assured that 

 no new pests will gain entry. This Territory and the State 



