What people are saying - Write a review
We haven't found any reviews in the usual places.
History and importance of the disease
Material and methods used in the study _
The susceptibility of clover
1 other sections not shown
acute stage adult clover leafhoppers amount of yellow aphid August 18 bell jar Black1 cage cent of yellow certiﬁcation check plants remained chronic stage clover ﬁelds deﬁnite developed the disease developed yellow dwarf disease1 experiment feeding period ﬁeld1 ﬁgure ﬁrst ﬂasks ﬂowers Green Mountain potato greenhouse growing season half-tubers healthy plants identiﬁed indicate inoculated inoculum insect vector insects July Koch Koch’s L. M. BLACK large potatoes Lygus medium red clover Mountain potato plants necrosis October 12 overwinter persicae Sulz plants grown plants remained healthy plants showing plants were grown plants1 Plate III1 potato ﬁelds potato ﬂeabeetle POTATO YELLOW DWARF Prince Edward Island roguing sample sanguinolenta second vegetative seed plots SEED STOCKS seed-potato sepals sister check plants slicing small potatoes source of inoculum STUDY or POTATO symptoms in 1934 test plants tion transmission tubers1 viruliferous clover leafhoppers virus1 Vmus writer’s yellow-dwarf content yellow-dwarf plants yellow-dwarf virus York seed