Titlebook: Hops; R. A. Neve Book 1991 R. A. Neve 1991 botanics.botany.breeding.information.virus

高貴領導

Colonoscopy

和音

Pests and diseases: historical review,Hops are subject to attack by several pests and diseases and the most serious of these, if not controlled, will reduce the crop to a level at which it is not worth harvesting. The few cones that might be produced would probably be themselves so discoloured that they would be unmarketable.

critic

符合你規(guī)定

Varieties and breeding,The origins of hop growing and the sources of the original plants must be a matter for conjecture but presumably hop cones were first harvested from wild plants and some of the same plants would have been collected when they were first taken into cultivation.

HERE

misshapen

MEEK

Botany,of approximately 35° and 70° N. . is widespread throughout much of China and Japan but has not been recorded elsewhere. Remarkably little is known about . of which there are very few herbarium specimens and no plants in cultivation.

協(xié)迫

手銬

Virus diseases,traditional hop varieties have been in cultivation for a very long time, possibly for as long as 200–300 years. In England the Fuggle variety, which is a comparative newcomer, has been grown for over 100 years. In view of their long history it is surprising that virus problems have not been more severe.