Hop aphis in Pacific region.

Spring grain aphis or "green bug" in the Southwest and possibilities of outbreak in 1916.
Published: (1916)

Rose aphis.
Published: (1914)

Studies on contact insecticides.
Published: (1923)

Papers on cereal and forage insects : Contributions to knowledge of corn root-aphis.
Published: (1910)

Defoliation of Sitka spruce by green spruce aphis.
Published: (1918)

Oat aphis.
Published: (1914)

Spring grain-aphis or so-called "green bug" (Toxoptera graminum Rond.).
Published: (1907)

Spring grain-aphis or so-called "green bug" (Toxoptera graminum Rond.).
Published: (1909)

Hop culture in California.
Published: (1900)

Growing and curing hops.
Published: (1907)

Hop cultivation in Bohemia.
Published: (1899)

Papers on aphididae : Contents and index.
Published: (1915)

Walnut aphides in California.
Published: (1914)

Hops in principal countries : their supply, foreign trade, and consumption, with statistics of beer brewing.
Published: (1907)

Necessity for new standards of hop valuation.
Published: (1909)

Hop crop of U.S., 1790-1911.
Published: (1912)

Rose aphis.
Published: (1914)

Oat aphis.
Published: (1914)

Walnut aphides in California.
Published: (1914)

Calcium arsenate dusting as cause of aphid infestation.
Published: (1930)

Woolly aphis of apple (Schizoneura lanigera Hausmann).
Published: (1897)

Woolly aphis of apple (Schizoneura lanigera Hausmann.).
Published: (1908)

Presence of arsenic in hops.
Published: (1917)

Papers on aphididae : Yellow clover aphis.
Published: (1914)

The riches of a hop-garden explain'd, from the several improvements arising by that beneficial plant: as well to the private cultivators of it, as to the publick : With the observations and remarks of the most celebrated hop-planters in Britain. Wherein such rules are laid down for the management of the hop, as may improve the most barren ground, from one shilling to thirty or forty pounds an acre per annum. In which is particularly set forth, the whole culture from the first breaking up of the ground, the planting, &c. to the kilning, or drying of the hop. Rendred familiar to every capacity. By R. Bradley, professor of botany in the University of Cambridge, and F.R.S.
by: Bradley, Richard, 1688-1732
Published: (1731)

Some conditions influencing yield of hops.
Published: (1910)

Some insects injurious to truck crops : Hop flea-beetle.
Published: (1909)

Miscellaneous papers : Biological studies on three species of Aphididae.
Published: (1909)

How to protect rose bushes from rose aphids.
Published: (1917)

Brief information on aphids affecting shade and ornamental shrubs and how to control them.
Published: (1916)

Papers on aphididae : Studies on new species of Toxoptera, with analytical key to genus and notes on rearing methods.
Published: (1912)

Biology and ecology of aphids /
Published: (2016)

Life history of 2 species of plant-lice, inhabiting both witch-hazel and birch.
Published: (1901)

Marketing agreement regulating handling of hops grown in Oregon, California, and Washington.
Published: (1938)

Biology and control of corn leaf aphid with special reference to Southwestern States.
Published: (1932)

Advance sheets of consular reports.
Published: (1898)