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Observations on the witches-broom formations in Scurrula pulverulenta (Wall.) G. Don (Loranthaceae)






World Weeds 2(2): 63-68

Observations on the witches-broom formations in Scurrula pulverulenta (Wall.) G. Don (Loranthaceae)

Observations on witches broom formations which were found on up to 10-20% of Scurrula pulverulenta during a survey in Doon Valley (Uttar Pradesh) are presented. The growth pattern of S. pulverulenta is described. The hyperparasite causing witches brooms is identified as an insect, Sumatraphis n. sp., which feeds on hosts of all ages and stimulates vegetative and reproductive structures to develop into witches brooms.


Accession: 002909468



Related references

Dundir, Y.P.S.; Adhin, D., 1982: Self-parasitism of Scurrula pulverulenta (Wall) G. Don (Loranthaceae). An important pest of trees and shrubs at Dehra Dun.

Pundir, Y.P.S., 1997: First report of Scurrula pulverulenta (Wall.) G. Don. (Loranthaceae) on gymnosperms. The occurrence of an introduced gymnosperm - Taxodium mucronatum - as a host of the mistletoe Scurrula pulverulenta is reported for the first time from India.

Pundir, Y.P.S., 1996: Unrecorded hosts of Scurrula pulverulenta (Wall.) G. Don. (Loranthaceae) from Doon Valley. Two new hosts of Scurrula pulverulenta (Ficus krishnae and Mangifera indica) are reported from Doon Valley.

Pundir, Y.P.S.; Dhan Singh, 1998: More unrecorded hosts of Scurrula pulverulenta (Wall.) G. Don (Loranthaceae) from Doon Valley and adjacent areas. The paper reports Colebrookea oppositifolia and Bauhinia retusa [B. semla] as 2 new hosts of S. pulverulenta from Tehri-Garhwal in Uttar Pradesh, India. The parasitic bushes on C. oppositifolia were healthy, but B. retusa may not be a preferred ho...

Pundir, Y.P.S., 1995: Host range of Scurrula pulverulenta (Wall.) G. Don (Loranthaceae) from Doon Valley and adjacent areas. Observations made over the last 2 decades are reported on 81 previously unrecorded broadleaved forest tree hosts of Scurrula pulverulenta, distributed among 58 genera and 34 plant families. This brings the total number of hosts for the parasite to...

Pundir, Y.P.S.; Mishra, A.K., 1990: Cryptolepis buchanani (Asclepiadaceae) a new host of Scurrula pulverulenta (Loranthaceae). The climber Cryptolepis buchanani is quite common on many trees and shrubs in the Siwaliks Doon Valley and the Lower Himalayas in India. Most climbers have in the past been observed to be free of from attack by the mistletoe Scurrula pulverulenta,...

Grazi, G., 1984: Possible host dependency of epicortical root formation in cultivated Scurrula pulverulenta (Loranthaceae). 2 plants of the mistletoe Scurrula pulverulenta were grown successfully from Indian seeds on Quercus ilex and Hedera helix. The plant on ivy grew vigorously and after 3 yr produced many flowers, normal berries and seeds. The plant on oak grew less...

Davis, R.E.; Dally, E.L.; Prince, J.P.; Lee, I.M.ng, 1994: Delineation of a genomic cluster containing mycoplasmalike organisms associated with sweet potato witches broom, red bird cactus witches broom, and peanut witches broom diseases. Phytopathology 84(10): 1070

Pundir, Y.; Adhin, D., 1985: Two new hosts of Scurrula pulverulenta (Wall.) G.Don from Siwaliks (India). Indian journal of forestry 8(2): 156-157

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