mostly on leaves, sometimes on petioles and stems, amphiphylous, chiefly hypophylous, yellowish or pale yellowish brown, scattered or combined in groups, naked, round, about 1-2 cm in diam.
abaxial, yellowish, pulverulent, scattered, minute.
scitula is a teleomorph name, only uredinia
were described; no telia were found on the type or other specimens examined of H.
amphigena, cinnamomea, pulverulenta, epidermide fissa cinctis, 0,5-1,0 mm, aggregata aut sparsa; urediniosporis 25-35 x 17,5-25 [micron]m, ovatis, elipsoideis, raro triangularis, poris germinationis 2-4 aequatorilibus aut subaequatorialibus; episporio 1,5-3,5 [micron]m, dilute brunneis, echinulato.
For each leaf on which uredinia
and urediniospore production were to be determined, leaf length and width (each in centimeters) were measured the day of inoculation.
amphigenous, scattered, cinnamon brown, covered by ruptured epidermis, naked, 0.
more than 800 [micro]m in diameter were found on the unifoliolate leaves of all plants of Nebr.
KS00WGRC44 had a lower infection type of 1 (flecks with small necrotic uredinia
) when inoculated with leaf rust race PNM-10,18 at the seedling stage than that observed on the lines TA 4186 (Lr39; IT = 4) and KS90WGRC10 (Lr41; IT = 3C, moderate size uredinia
Compared with Thatcher, which was rated at 90 S (large uredinia
), the Thatcher lines with Lr2a, Lr9, and Lr26 had leaf rust ratings of 20 M, 10 MR (moderate size uredinia
with necrosis), and 30 MR, respectively, in plots at Kinston (Table 1).
Scores were by pustule type on a 0 to 4 scale as follows: 0 = no uredinia
or visible symptoms, 1 = small uredinia
with necrotic edge, 2 = small to medium uredinia
with limited urediospore production, 3 = medium-sized uredinia
with moderate sporulation, 4 = large, ragged uredinia
with abundant sporulation.
Pustule type (PT) was visually determined by means of a scale from 0 to 4 where 0 = no uredinia
, 1 = chlorotic flecks, 2 = small uredinia
surrounded by necrosis with limited urediniospore production, 3 = medium size uredinia
with moderate sporulation, and 4 = large uredinia
and abundant sporulation (Welty and Barker, 1993).
Disease reactions of segregating progeny were classified as either a hypersensitive fleck with no sporulation (IT = ;) or susceptible with medium to large uredinia
(IT = 3-4).