Relationship between incidence and severity of cashew gummosis in semiarid north-eastern Brazil
Relationship between incidence and severity of cashew gummosis in semiarid north-eastern Brazil
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DOI：
10.1111/j.0032-0862.2004.01007.x
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发表时间：
2004-06-01
期刊：
影响因子：
2.7
通讯作者：
Vidal, JC
中科院分区：
文献类型：
--
作者：
Cardoso, JE;Santos, AA;Vidal, JC
研究了腰果胶病（Lasiodiplodia theobromae）的发病率-严重程度关系，以确定用发病率间接估计疾病严重程度的可行性，从而确定该疾病在巴西东北部半干旱地区造成的潜在危害。从1995年到1998年，在一个由28个矮克隆组成的试验田监测了两个腰果果园的流行病，从2000年到2002年，在一个单一克隆的商业果园监测了流行病。这两个地点相距10公里。由地点、年龄和汇总数据的决定系数确定的对数变换对发病率和严重性数据的线性调整效果最好。在不同的疾病压力、不同的腰果基因型、不同的年龄和不同的流行阶段，这两个领域的发病率和严重程度之间存在非常高的相关性。因此，容易评估的牙龈病发病率可以用来估计牙龈病的严重程度。
The incidence-severity relationship for cashew gummosis, caused by Lasiodiplodia theobromae, was studied to determine the feasibility of using disease incidence to estimate indirectly disease severity in order to establish the potential damage caused by this disease in semiarid north-eastern Brazil. Epidemics were monitored in two cashew orchards, from 1995 to 1998 in an experimental field composed of 28 dwarf clones, and from 2000 to 2002 in a commercial orchard of a single clone. The two sites were located 10 km from each other. Logarithmic transformation achieved the best linear adjustment of incidence and severity data as determined by coefficients of determination for place, age and pooled data. A very high correlation between incidence and severity was found in both fields, with different disease pressures, different cashew genotypes, different ages and at several epidemic stages. Thus, the easily assessed gummosis incidence could be used to estimate gummosis severity levels.