Abstract
Pathogenic isolates of Sirococcusstrobilimts from Piceamariana were studied under laboratory conditions to determine the temperature, light, and humidity requirements for conidial germination, mycelial growth, pycnidial production, and infection of spruce seedlings. Conidial germination and mycelial growth occurred between 5 and 30 °C. The fungus survived temperatures of −10 °C, as well as outdoor winter conditions, for several weeks. Temperatures of 35 °C were lethal to spores and mycelium after exposure of 2 and 7 days, respectively. Light did not measurably affect conidial germination and mycelial growth but was necessary for pycnidial production. Infection of Piceamariana seedlings occurred in artificially inoculated seedlings enclosed in plastic bags to maintain a high humidity for at least 1 day after inoculation. Infection was greatest under a daily temperature cycle of 16–21 °C, less at 10–16 °C, and significantly reduced at 24–30 °C. At all temperature ranges, the percentage infection was greater under low light intensities (900–3900 lx) than under relatively high light intensities (4300 – 10 000 lx). It is concluded that warm sunny weather during the period of susceptibility would probably control this desease; protective measures are necessary only if frequent or prolonged periods of below-average temperatures and wet cloudy weather occur during the summer months.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Conidial germination and mycelial growth of Sirococcus occurred between 5 and 30 °C.
- Taxon
- black spruce
Picea marianat0 - Outcome
- Conidial germination and mycelial growthe1
- Value
- 5 and 30 °Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e1“Conidial germination and mycelial growth occurred between 5 and 30 °C”
Claim · model-written summary
The Sirococcus fungus survived temperatures of −10 °C for several weeks.
- Taxon
- black sprucePicea marianat0
- Interactor
- funguse2pathogen
- Outcome
- survivede2
- Value
- −10 °Ce2
- Qualifier
- for several weekse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e2“The fungus survived temperatures of −10 °C, as well as outdoor winter conditions, for several weeks”
Claim · model-written summary
Temperatures of 35 °C were lethal to Sirococcus spores and mycelium.
- Taxon
- black sprucePicea marianat0
- Outcome
- lethal to spores and myceliume3
- Value
- 35 °Ce3
- Qualifier
- after exposure of 2 and 7 days, respectivelye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e3“Temperatures of 35 °C were lethal to spores and mycelium after exposure of 2 and 7 days, respectively”
Claim · model-written summary
Light did not measurably affect Sirococcus conidial germination and mycelial growth.
- Taxon
- black sprucePicea marianat0
- Treatment
- Lighte4
- Outcome
- conidial germination and mycelial growthe4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e4“Light did not measurably affect conidial germination and mycelial growth”
Claim · model-written summary
Sirococcus infection of black spruce seedlings occurred when inoculated seedlings were enclosed in plastic bags for at least 1 day.
- Taxon
- black sprucePicea marianat0
- Organ / stage
- seedlingse6
- Outcome
- Infectione6
- Qualifier
- enclosed in plastic bags to maintain a high humidity for at least 1 day after inoculatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e6“Infection of Piceamariana seedlings occurred in artificially inoculated seedlings enclosed in plastic bags to maintain a high humidity for at least 1 day after inoculation”
Claim · model-written summary
Sirococcus infection was greatest under a daily temperature cycle of 16–21 °C, compared with 10–16 °C.
- Taxon
- black sprucePicea marianat0
- Treatment
- daily temperature cycle of 16–21 °Ce7
- Outcome
- Infectione7
- Direction
- greateste7
- Comparator
- 10–16 °Ce7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e7“Infection was greatest under a daily temperature cycle of 16–21 °C, less at 10–16 °C, and significantly reduced at 24–30 °C”
Claim · model-written summary
Sirococcus infection was significantly reduced at 24–30 °C.
- Taxon
- black sprucePicea marianat0
- Treatment
- 24–30 °Ce7
- Outcome
- Infectione7
- Direction
- significantly reducede7
- Comparator
- 16–21 °Ce7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e7“Infection was greatest under a daily temperature cycle of 16–21 °C, less at 10–16 °C, and significantly reduced at 24–30 °C”
Claim · model-written summary
Sirococcus infection percentage was greater under low light intensities (900–3900 lx) than under high light intensities (4300 – 10 000 lx).
- Taxon
- black sprucePicea marianat0
- Treatment
- low light intensities (900–3900 lx)e1
- Outcome
- percentage infectione1
- Direction
- greatere1
- Qualifier
- At all temperature rangese1
- Comparator
- relatively high light intensities (4300 – 10 000 lx)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e1“At all temperature ranges, the percentage infection was greater under low light intensities (900–3900 lx) than under relatively high light intensities (4300 – 10 000 lx)”
Claim · model-written summary
The authors recommend protective measures only if cool, wet and cloudy weather persists during summer.
- Taxon
- black sprucePicea marianat0
- Outcome
- protective measurese2
- Qualifier
- necessary only if frequent or prolonged periods of below-average temperatures and wet cloudy weather occure2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e2“protective measures are necessary only if frequent or prolonged periods of below-average temperatures and wet cloudy weather occur during the summer months”
Claim · model-written summary
Warm sunny weather during the period of susceptibility would probably control Sirococcus shoot blight.
- Taxon
- black sprucePicea marianat0
- Outcome
- controle4
- Qualifier
- warm sunny weather during the period of susceptibilitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Environmental factors affecting Sirococcus shoot blight of black spruce”
e4“warm sunny weather during the period of susceptibility would probably control this”
The same questions in other papers
light · disease · Picea mariana (black spruce)Results agree
1 paper in the same direction as this paper
- no effect
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.