Additional Insecticide Experiments for the San Jose Scale
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In our eReader you can find the full English version of the book. Read Additional Insecticide Experiments for the San Jose Scale Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Additional Insecticide Experiments for the San Jose Scale
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A similar statement may be made with reference to the effects of rain as represented by the application of water to our experimental trees. This clearly has the effect to delay, but not to prevent, a complete destruction of the scale, and it is apparent that these western washes, costing $1. 12 per hundred gallons, are at least as destructive to insect life as the solution of whale oil soap, costing $6. 50 for the same quantity.
The following table will give some details of observation not repo...rted in the text. The numbers used for the trees are the same as those in the tables of Bulletin 71, pages 249-258, and the experimental history of each tree can also be found in that bulle- tin. It is to be understood that five hundred scales were counted for each tree May 12. The first tree of each pair was sprayed with the California wash, and the second with the Oregon wash.
268 BULLETIN NO. 72. TABLE OF COMPARATIVE RESULTS.
[May, 1902.
No. Of Tree.
Date of Treat- Per cent, alive Per cent, killed Per cent, killed ment.
What to read after Additional Insecticide Experiments for the San Jose Scale?
You can find similar books in the "Read Also" column, or choose other free books by Stephen Alfred Forbes to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A similar statement may be made with reference to the effects of rain as represented by the application of water to our experimental trees. This clearly has the effect to delay, but not to prevent, a complete destruction of the scale, and it is apparent that these western washes, costing $1. 12 per hundred gallons, are at least as destructive to insect life as the solution of whale oil soap, costing $6. 50 for the same quantity.
The following table will give some details of observation not repo...rted in the text. The numbers used for the trees are the same as those in the tables of Bulletin 71, pages 249-258, and the experimental history of each tree can also be found in that bulle- tin. It is to be understood that five hundred scales were counted for each tree May 12. The first tree of each pair was sprayed with the California wash, and the second with the Oregon wash.
268 BULLETIN NO. 72. TABLE OF COMPARATIVE RESULTS.
[May, 1902.
No. Of Tree.
Date of Treat- Per cent, alive Per cent, killed Per cent, killed ment.
What to read after Additional Insecticide Experiments for the San Jose Scale?
You can find similar books in the "Read Also" column, or choose other free books by Stephen Alfred Forbes to read onlineMoreLess
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