<div class="description">
Subjects: plant pests; life cycle (organisms); Oyster-shell scale; Scurfy scale; scale insects; insect pests; orchards; fruit trees; trees; ornamental trees; shade trees; street trees; shrubs; spraying; sulfur; horticultural oils; insecticidal soaps</div>
<div class="fn value">
<dl><dd>Quaintance, A. L.</dd>
<dd>Sasscer, E. R.</dd></dl></div>
Internet Archive identifier