Observations And Experiments On the San Jose Scale
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The trees were graded on a scale of 10 degrees, the sev- eral grades having the following significance: 1 signifies a tree infested by a trace of the San Jose scale so very slightly infested that one must search to discover the insects; 2, a tree slightly infested, that is, having scattered scales upon it, nowhere clustered and yet fairly numerous; 3, a tree slightly in- 552 BULLETIN No. 180 m [March, f ested, with the insects showing a tendency in places to form clusters ; 4, a tree with scale...s which show a decided tendency towards the for- mation of clusters, yet have parts but slightly infested; 5, a mod- erately infested tree, the scales being fairly abundant over the entire tree, and frequently forming groups or clusters; 6, a tree mostly moderately infested, but with some parts so badly infested as to be evidently suffering; 7, a tree considerable parts of which are badly infested, yet having parts infested to only a moderate degree; 8, a tree for the most part badly infested, but not incrusted, evidently suffering from the attack of the scale ; 9, a tree badly infested, with some parts incrusted; and 10, an incrusted tree.
What to read after Observations And Experiments On 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:
The trees were graded on a scale of 10 degrees, the sev- eral grades having the following significance: 1 signifies a tree infested by a trace of the San Jose scale so very slightly infested that one must search to discover the insects; 2, a tree slightly infested, that is, having scattered scales upon it, nowhere clustered and yet fairly numerous; 3, a tree slightly in- 552 BULLETIN No. 180 m [March, f ested, with the insects showing a tendency in places to form clusters ; 4, a tree with scale...s which show a decided tendency towards the for- mation of clusters, yet have parts but slightly infested; 5, a mod- erately infested tree, the scales being fairly abundant over the entire tree, and frequently forming groups or clusters; 6, a tree mostly moderately infested, but with some parts so badly infested as to be evidently suffering; 7, a tree considerable parts of which are badly infested, yet having parts infested to only a moderate degree; 8, a tree for the most part badly infested, but not incrusted, evidently suffering from the attack of the scale ; 9, a tree badly infested, with some parts incrusted; and 10, an incrusted tree.
What to read after Observations And Experiments On 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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