A Review of<i>Lasiodiplodia theobromae</i>with Particular Reference to its Occurrence on Coniferous Seeds

Cilliers, A. J.; Swart, W. J.; Wingfield, Michael J.

doi:10.1080/00382167.1993.9629398

Cited by 13 publications

(13 citation statements)

References 12 publications

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“…This tendency points out to the previous hypothesis that the pathogen is first introduced via randomly infected planting materials. Lasiodiplodia theobromae has been reported as an endophytic fungus (Baird and Carling 1998; Cilliers 1993; Mohali et al. 2005; Mullen et al.…”

Section: Discussionmentioning

confidence: 99%

Spatial-temporal Analysis of Gummosis in Three Cashew Clones at Northeastern Brazil

Cysne

Cardoso

Maia

et al. 2010

Journal of Phytopathology

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The cashew gummosis caused by the fungus Lasiodiplodia theobromae is one of the most important disease of cashew in the northeast of Brazil. The lack of studies about method of early detection, pathogen dissemination, host predisposition, mechanisms of attack and defence and efficient control measures assures this disease as a limiting factor as to growing of cashew under semi-arid conditions. Therefore, the characterization of spatial patterns of gummosis development under commercial orchards may provide important insights into the mechanisms involving in dissemination and disease progress of this disease, as well as in the understanding of dynamic of host, pathogen and environmental interactions for this pathossystem. This work aimed to characterize gummosis temporal and special dynamics in three commercial orchards of cashew clones of cashew with different levels of susceptibility by studying the special arrangement of diseased plants. Disease incidence and severity, quantified determined by a descriptive scale in clones BRS 226 (resistant), Embrapa 51 (slightly resistant) and Faga 11 (susceptible) in a commercial orchard located in Pio IX district (Piaui state, Brazil), were monitored and mapped. Data were collected within three blocks of 90 plants for each clone. Indices of dispersion were estimated to study the spatial dynamic. The dynamics and structure of gummosis foci were also analysed. As expected, data showed different degrees of gummosis incidence and severity for the three clones. Even under different levels of disease, a random dispersion pattern model of dispersion could be observed at the beginning of epidemic for all clones. However, as disease develops, a clustered model is likely to fit. The increase in disease incidence resulted from the increasing in both focus number and size.

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Section: Discussionmentioning

confidence: 99%

Spatial-temporal Analysis of Gummosis in Three Cashew Clones at Northeastern Brazil

Cysne

Cardoso

Maia

et al. 2010

Journal of Phytopathology

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“…Firstly, they are very common in most environments and virtually all seedling and more mature germplasm moved across the world is bound to contain some infections of Botryosphaeriaceae. Some Botryosphaeriaceae can also be seed-borne (Cilliers et al 1993, Gure et al 2005. Furthermore, their cryptic, endophytic habit for a large part of their life cycle makes them very difficult to detect.…”

Section: The Threat Of Botryosphaeriaceae To Eucalyptus and Related Pmentioning

confidence: 99%

A diverse assemblage of Botryosphaeriaceae infectEucalyptusin native and non-native environments

Slippers

Burgess²,

Pavlic³

et al. 2009

Southern Forests: a Journal of Forest Science

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“…Alguns autores referem-se a esse fenômeno como endofitismo (FAETH, 2002;AZE-VEDO, 1998) enquanto que outros simplesmente o atribuem apenas ao estágio de patógeno latente (BAIRD;CARLING, 1998;CILLIERS et al, 1993, MÜLLEN et al 1991. Baseado nessas informações, a possibilidade de que, por alguma razão ainda desconhecida, L. theobromae tenha baixa capacidade de sobreviver de forma latente em plantas do clone CCP 06, constitui-se numa hipótese a ser avaliada.…”

Section: Resultsunclassified

Interação enxerto e porta-enxerto na incidência da resinose do cajueiro

et al. 2010

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RESUMO -A expansão do cajueiro-anão-precoce no Brasil vem promovendo baixa diversidade genética dos genótipos usados como enxerto e porta-enxerto, ensejando vulnerabilidade da cultura às vicissitudes bióticas como a resinose (Lasiodiplodia theobromae), principal doença do cajueiro no semiárido nordestino. Estima-se que cerca de meio milhão de mudas de cajueiro-anão-precoce sejam produzidas anualmente, sendo a grande maioria delas produzida de propágulos enxertados sobre plântulas oriundas de sementes do clone CCP 06. A principal estratégia de manejo da resinose é o plantio de clones resistentes. Entretanto, entre os aspectos que contribuem para sucessivas epidemias da resinose, destaca-se a falta de estudos de interações genotípicas entre enxerto e porta-enxerto. Este estudo objetivou avaliar o efeito de combinações de clones de cajueiro-anão-precoce usados como enxerto e porta-enxerto na incidência da resinose. Sementes de plantas de polinização aberta de seis clones selecionados foram usadas para produção de porta-enxerto. Os clones comerciais CCP 76 (suscetível) e BRS 226 (resistente) foram usados como enxertos. O experimento foi realizado obedecendo ao delineamento de blocos ao acaso, no esquema fatorial 2 x 6, com quatro repetições e nove plantas por parcela do tipo quadrada, sob condições de elevada pressão da doença, em Pio IX-PI. Três anos após o plantio definitivo, a incidência (I) e a severidade (S) (escala de 0 a 4) da resinose foram superiores no clone CCP 76 (I = 97% e S=2,10) em relação ao BRS 226 (I = 33% e S=0,36), independentemente do porta-enxerto. O clone CP 06 como porta-enxerto foi o único que reduziu a incidência e a severidade da resinose, independentemente do genótipo do enxerto. Este clone foi capaz de reduzir a severidade da resinose do clone CCP 76 (S=2,10) como enxerto em quase 30%. Termos para indexação: Lasiodiplodia theobromae, Anacardium occidentale, resistência genética. EFFECT OF CASHEW CLONE USED AS ROOTSTOCKS AND SCIONS ON GUMMOSIS INCIDENCE IN CASHEW PLANTSABSTRACT -The expansion of early dwarf cashew (EDC) crop in Brazil has promoted a reduced genetic diversity of cashew genotypes used to both as scion and root-stock. This may contribute to enhance crop vulnerability to some biological harm such as the infection by the gummosis fungus agent, Lasiodiplodia theobromae, the most important disease of this plant in semi-arid north-eastern Brazil. It has been estimated that half a million graft plants of EDC are yearly produced in Brazil, most of them obtained by grafting over seedling from CCP 06 clone as root-stock. The only means of managing gummosis is by the use of genetically resistant clones. However, the lack of studies on the scion and stock genotypic interactions has contributed to outbreak of successive gummosis epidemics. This study was developed in order to evaluate the effect of different combinations of EDC clones used as scion and stock on gummosis incidence. Rootstocks, prepared from seeds of six open pollinated plants, were grafted with two commercial clones: CCP...

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A Review ofLasiodiplodia theobromaewith Particular Reference to its Occurrence on Coniferous Seeds

Cited by 13 publications

References 12 publications

Spatial-temporal Analysis of Gummosis in Three Cashew Clones at Northeastern Brazil

Spatial-temporal Analysis of Gummosis in Three Cashew Clones at Northeastern Brazil

A diverse assemblage of Botryosphaeriaceae infectEucalyptusin native and non-native environments

Interação enxerto e porta-enxerto na incidência da resinose do cajueiro

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