The effect of different levels of leaf development on streaking was examined in two leaf sections: "middle", relatively mature at time of infestation and "lower", unemerged at time of infestation.
We tested the effect of numbers of RWA and duration of infestation on streaking. Either one or three adult RWA were confined to a cage on an expanding leaf for 1, 2, or 3 d.
Therefore, the width of a barley leaf is relatively uniform along a large portion of the blade and streaking measurements need only to be across the width.
1) provided a quantitative method of measuring one specific symptom of RWA leaf damage, percent streaking. The series of circles was successfully used to confirm and quantify observations on the relationship between RWAs and streaking and as to the location and development of the streaks.
The effect of Russian wheat aphids (RWA) location and age on leaf streaking.
Improperly dried beige PC showed slight black streaking over the last third of the part to fill.
It was difficult to find evidence of streaking on gray parts produced with the lower nozzle temperature.
Samples molded on the upgraded equipment showed no evidence of the star-patterned streaking observed when processing with the original equipment.