T�tulo: Field and Laboratory Techniques for Evaluating Hemlock Sawfly Infestations (Classic Reprint)
Editor: Forgotten Books
Fecha de publicaci�n: 2018
Idioma: Ingl�s
ISBN 10: 033140513X
ISBN 13: 9780331405132
Encuadernaci�n: HRD
Estado: New
Peso: 252 gramos

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Sinopsis

Excerpt from Field and Laboratory Techniques for Evaluating Hemlock Sawfly Infestations

Figure 2.-feeding colony of early instar hemlock sawfly larvae. Note-character of needles which have been fed upon.

Figure 3. - ~hemlock sawfly cocoon showing the evenly cut margin of cap resulting from normal sawfly emergence.

Figure 4.-severe defoliation of mature western hemlock caused by hemlock sawfly.

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