Incidence of Resin-Soaked Roots in Subsoiled Loblolly Pine Seed Orchards on Sandy Soils
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Abstract The root systems of 70 loblolly pines (Pinus taeda L.) from three subsoiled seed orchards were excavated to determine the association of subsoiling with the incidence of resin-soaked lateral roots. The number of lateral roots and the proportion of resin-soaked and healthy root tissue were recorded. Chips from the resin-soaked margin of lateral roots were incubated for 10 days at 24°C on two general media and two media selective for Heterobasidion annosum (Fr.) Bref. Verticicladiella procera Kend. was isolated from 30 percent of the declining/subsoiled trees at one seed orchard. Monilia spp. were also isolated. Of the lateral roots severed by subsoiling, 60 percent were resin-soaked from 10 to 45 cm in length.
1991 ◽
Vol 15
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pp. 44-50
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2002 ◽
Vol 26
(3)
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pp. 146-152
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1988 ◽
Vol 12
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pp. 33-36
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1998 ◽
Vol 28
(1)
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pp. 106-114
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2002 ◽
Vol 26
(4)
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pp. 173-180
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1993 ◽
Vol 3
(3)
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pp. 169
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