Effects of temperature and leaf wetness on the potato late blight

Hartill, W. F. T.; Young, Kenneth R.; Allan, D. J.; Henshall, W. R.

doi:10.1080/01140671.1990.10428093

Cited by 19 publications

(11 citation statements)

References 2 publications

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“…To our knowledge, no previous research has demonstrated the effect of temperature on late blight development on hairy nightshade. Our data shows that the optimum temperature range (18-22°C) for infection of hairy nightshade is the same as that previously reported for potato and tomato (Minogue and Fry, 1981;Hartill et al, 1990;Sato, 1994;Mizubuti and Fry, 1998;Becktell et al, 2005). Variation in RH effects on foliar incidence and late blight severity was observed in our experiments.…”

Section: Discussionsupporting

confidence: 89%

“…Due to the fact that RH conditions for late blight development are well documented for potato and tomato (Minogue and Fry, 1981;Hartill et al, 1990;Gleason et al, 1995), humidity effects were only evaluated on hairy nightshade. Six to eight-week old hairy nightshade plants were inoculated with sporangia suspension at 5 · 10 3 sporangia ⁄ ml using the 00-109, 02-1, 00-9, and 00-87 isolates.…”

Section: Effects Of Rhmentioning

confidence: 99%

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Infection Potential of Hairy Nightshade (Solanum sarrachoides) by Phytophthora infestans and Late Blight Implications of the Alternate Host

Olanya

Plant²,

Larkin

et al. 2009

Journal of Phytopathology

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Infection of hairy nightshade (Solanum sarrachoides Sendt.) by Phytophthora infestans has been reported. However, the epidemiological significance of hairy nightshade to potato late blight is not well known. Disease development and infection rates of P. infestans were quantified on hairy nightshade relative to tomato (cv. Brandywine) and potato (cv. Shepody) hosts to evaluate infection potential at 14, 18, 22 and 26°C and 72, 82, 87, and 92% relative humidity (RH). The susceptibility of hairy nightshade to inoculum levels, weed ontogeny, and sporangia production potential were also investigated. Late blight development varied among hairy nightshade, tomato and potato hosts. Pathogen infection rates ranged from 0.0325 to 0.4674 gompits ⁄ day (unit for quantifying infection rates), and were significantly (P < 0.05) greater on potato and tomato than on hairy nightshade. Late blight severity was variably affected by RH. Disease levels on hairy nightshade varied with inoculum load; and ranged from 9 to 26% and 26 to 37% at low (5 · 10 3 ) and high (25 · 10 3 ) sporangia concentrations, respectively. Late blight was recorded irrespective of hairy nightshade ontogeny, and was significantly greater on 8-10 than 4-6-week-old plants. These results indicate that pathogen, environmental and host factors affect late blight development on hairy nightshade.

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Section: Discussionsupporting

confidence: 89%

Section: Effects Of Rhmentioning

confidence: 99%

Infection Potential of Hairy Nightshade (Solanum sarrachoides) by Phytophthora infestans and Late Blight Implications of the Alternate Host

Olanya

Plant²,

Larkin

et al. 2009

Journal of Phytopathology

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“…Phytophthora infestans can cause severe damage in potato crops. Favourable circumstances are dull, not too cold weather, with long periods of leaf wetness (Harthill et al ., 1990;Harrison, 1995). During the growing season, Dutch farmers apply fungicides every 5 -7 days during favourable weather, up to 15 times a season.…”

Section: Phytophthora Infestans Models (Plant-plus and Prophy)mentioning

confidence: 99%

Decision support systems used in the Netherlands for reduction in the input of active substances in agriculture

Bouma¹

2003

EPPO Bulletin

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Since the middle of the 1980s, Dutch farmers have been using decision support systems (DSS) as an aid in the control of pests. This started with EPIPRE, then weather-related potato blight warning systems were developed (Prophy and Plant-Plus). In the 1990s, many weather-based DSS were developed against pests of orchards, flower bulbs, arable crops and field-produced vegetables. Also, a DSS was developed to predict and check the effect of meteorological conditions on the effectiveness of application timing of plant protection products (GEWIS). The use of these systems resulted in more sustainable crop protection: sustainable because the use of DSS led to a lower risk of crop damage and, in many cases, to a lower input of active substances, by optimization of the product and dose to actual phytosanitary and meteorological conditions. The use of GEWIS to ensure application at the right time of day further reduced the input of active substances and increased efficacy.

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“…Hartill et al. () showed that sporulation time for P. infestans on potato decreases with increasing temperatures between 5 and 22°C. Becktell et al.…”

Section: Introductionmentioning

confidence: 99%

“…He further reported that infected tuber slices incubated at 18-23°C in a saturated atmosphere very commonly produce sporangia in 72 h after zoospores have been placed on them. Hartill et al (1990) showed that sporulation time for P. infestans on potato decreases with increasing temperatures between 5 and 22°C. Becktell et al (2005) found for P. infestans on Petunia that there was very little difference in time required for sporulation at temperatures between 13 and 23°C (6-9 h), but that there was a slight trend towards more rapid sporulation at 23°C on petunia and tomato.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effects on the Onset of Sporulation by Phytophthora ramorum on Rhododendron ‘Cunningham's White’

Tooley

Browning

2015

Journal of Phytopathology

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The effect of temperature and moist period on the onset of sporangia production by Phytophthora ramorum on Rhododendron 'Cunningham's White' was examined with misted detached leaves held in humid chambers. Following wound inoculation with sporangia, leaves were pre-incubated at 20°C for either 24 or 72 h prior to placement at six different temperatures (4, 10, 15, 20, 25 and 30°C). The overall mean moist period required for first occurrence of sporulation over all six temperatures was 3.24 days with the 24-h pre-incubation time, compared with 1.49 days for the 72-h pre-incubation time. Following 24 h pre-incubation at 20°C and at an incubation temperature of 15°C, sporangia were first collected from leaves following a 24 h incubation. At 10 and 20°C, sporangia were first collected after 48 h, whereas at 4, 25 and 30°C, sporangia were first collected after 3 days. Following 72 h pre-incubation at 20°C, sporulation generally occurred within 1 day, even at temperatures such at 4 and 30°C that are suboptimal for sporulation. The highest levels of P. ramorum sporulation were observed at 20°C. P. ramorum formed sporangia on host tissue under moist conditions within the same time frame reported for P. phaseoli, P. palmivora and P. nicotianae, but substantially more slowly than certain other species such as P. infestans. Quantifying moisture and temperature conditions for initiation of sporangia production provides knowledge which leads to a greater understanding of the epidemic potential of P. ramorum.

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Effects of temperature and leaf wetness on the potato late blight

Cited by 19 publications

References 2 publications

Infection Potential of Hairy Nightshade (Solanum sarrachoides) by Phytophthora infestans and Late Blight Implications of the Alternate Host

Infection Potential of Hairy Nightshade (Solanum sarrachoides) by Phytophthora infestans and Late Blight Implications of the Alternate Host

Decision support systems used in the Netherlands for reduction in the input of active substances in agriculture

Temperature Effects on the Onset of Sporulation by Phytophthora ramorum on Rhododendron ‘Cunningham's White’

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