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measures. Certain it is that far-reaching resuUs have been ob- 

 tained through these phases of insect warfare, but the 

 use of direct measures on the part of the fruit-grower or planter 

 is still a necessity, and we must await further results from the 

 last named methods before we can do away with the former. All 

 insect pests have, naturally, many enemies, and in some localities, 

 notably in the United States and Hawaii, many additional ones 

 have been introduced. With these iusect friends the fruit-grower 

 should become acquainted, and not only should their propagation 

 and dissemination be encouraged, but the specialist engaged in 

 the work of investigating this phase of insect control should have 

 liberal support. 



Until very recent times the development of a country agri- 

 culturally, has implied that with the introduction of desirable 

 economic plants should come also their many and various insect 

 enemies, and that as the commercial relations of a country became 

 intimate with other countries such injurious species would con- 

 tinue to be introduced. Although many of the injurious species 

 of insects, particularly the class that includes the scale insects, 

 mealy-bugs, etc., are almost world wide in their distribution, there 

 are many that are peculiar to the country in which they occur. 

 It remains then for a community alive to its own interests to 

 take the necessary precautions that shall prevent the introduction 

 of these pests. Hawaii can well be commended for supporting 

 specialists to work out the problems along these lines. 



As regards the pests already present in the Islands affecting 

 fruit trees, the grower must look in the main to his own efforts 

 for relief. If we at the Experiment Station can help you, you 

 must let us know your problem in all its details. After four 

 years' experience in answering personal inquiries and letters on 

 this subject, I feel that first of all a grower must know what an 

 insect is, before he can form an opinion of the cause of the failure 

 for trees to grow. We get an inquiry "The blight is killing m^ 

 trees, what can I do for it?" We surmise that the "blight" is a 

 scale-insect, but naturally wonder what the blight is, what the 

 tree is, and are justified in many instances in thinking that the 

 trees might die in any event. That it isn't a case of dollars and 

 cents with many of our correspondents, we are certain, in that we 

 fail to get specimens and further details when writing in reply. 

 It often comes out that, "Oh w^ell, if we must do this or that, it 

 won't pay, I only thought you could send me a remedy that would 



