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Excerpt from Insecticides for Use in Hawaii
Vegetable gardening in the vicinity of the larger towns is at present the only side of horticulture developed within the Ter ritory. No large orchards or vin eva ards exist. Hawaiian agri culture 1s confined mainly to the production of field crops. The raising of fruits Is for the most part limited to a small number of trees about the homes.
Generally speaking, the measures taken in combating the in jurions insect pests of field crops must be precautionary, an effort to prevent their becoming established rather than attempting a remedv afterwards. But, when a pest is established, ano. Its Work s serious, the use of insecticides is in many cases feasible.
The balance of nature in these Islands is, at present, decidedly in favor of the insect pests. Tho-rough cultivation of crops, other than cane, has not been practiced; varieties of plants especially resistant to insect attacks have not been chosen, the proper time of planting has not always been taken into account; certain necessary elements, which the plants need for food, have been lacking in the soils, and, except in the raising of cane, have not been supplied by fertilizers. Insect pests have crept in upon us from abroad unobserved, leaving their enemies behind. There me no regular seasons of extreme cold or dryness, and. Thus re lieved of natural checks, the pests have multiplied rapidly. All these factors have turned the balance in favor of the pest. Every effort must be exerted to reverse the-balancein favor Of the plant. A. Good strong healthy plant will often show no serious effects from an attack by insects where a weak or poorlv fed plant will be completely devoured. Clean cultivation; the burning of all rubbish about cultivated fields which may harbor Insect pests; planting at the time attacks are known to be less serious; and, using fertilizers to supply in abundance the necessary elements of plant food, will tend to make strong healthy plants wtil in many cases will withstand insect attacks and thus render the use of insecticides unnecessary.
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