Diurnal patterns in dispersal of Monilinia fructigena conidia in an apple orchard in relation to weather factors
Diurnal patterns in dispersal of Monilinia fructigena conidia in an apple orchard in relation to weather factors
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DOI：
10.1016/j.agrformet.2008.10.001
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发表时间：
2009-03-11
影响因子：
6.2
通讯作者：
Jeger, Mike
中科院分区：
文献类型：
--
作者：
Bannon, Finian;Gort, Gerrit;Jeger, Mike
1997 年和 1998 年在苹果园采样了果褐腐病（引起仁果褐腐病）分生孢子的空气浓度，该浓度与天气条件有关。 1997年测得的每小时最高浓度为230个分生孢子/m(3)，1998年整个季节的浓度低于1997年。这两年的浓度在下午时间最高。采用广义线性模型，采用孢子计数的泊松分布和对数链接函数，用于研究孢子计数和滞后天气变量之间的关系。 1997 年，最佳拟合模型的变量温度滞后 100 小时、风向的东西向分量和风速；而 1998 年的最佳模型还包括相对湿度的影响。这两年，温度和风向对每小时孢子计数的影响是一致的，但是，尽管温度对孢子产生和成熟具有生物学相关的影响，但风向的影响可能反映了果园布局的纯粹局部效应。将结果与核果园中的观察结果进行比较，核果园中的Monilinia laxa 和Monilinia fructicola 是主要物种，并讨论了这些系统之间流行病学的差异。 (C) 2008 Elsevier B.V. 保留所有权利。
The aerial concentration of Monilinia fructigena (causing brown rot in pome fruit) conidia was sampled during 1997 and 1998 in an apple orchard and was related to weather conditions. The highest hourly concentration measured in 1997 was 230 conidia/m(3), in 1998 concentrations were lower than in 1997 throughout the season. In both years concentrations were highest in the afternoon hours. Generalised linear models, employing a Poisson distribution for the spore counts and a logarithm link function, were used to study the relationships between spore counts and lagged weather variables. In 1997 the best fitting model had variables temperature lagged at 100 h, an east-west component of wind direction, and wind speed; whereas in 1998 the best model included in addition an effect of relative humidity. Temperature and wind direction had consistent effects on hourly spore counts in both years, but whereas temperature has a biologically relevant effect on spore production and maturation, the effect of wind direction is likely to reflect the purely local effect of orchard layout. Results are compared with observations made in stone fruit orchards where Monilinia laxa and Monilinia fructicola are the predominant species, and differences in epidemiology between these systems are discussed. (C) 2008 Elsevier B.V. All rights reserved.