Economics of controlling secondary leaf fall of Hevea caused by Oidium Heveae Steinm

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Journal of Rubber Research (JRR)

1969

Economics of controlling secondary leaf fall of Hevea caused by Oidium Heveae Steinm

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File	Description	Size	Format
ARTICLE	Wastie_1969_Economics_controlling_secondary	865 KB	Adobe Acrobat PDF
METADATA	Article Metadata	3 KB	XML Document

Title: Economics of controlling secondary leaf fall of Hevea caused by Oidium Heveae Steinm
Creator: Wastie, R.L.
Creator: Mainstone, B.J.
Contributor: SAUID|ZAWATI
Subject: PRRIM
Subject: Leaf diseases
Date: 20041201 | 20050114 | | 1969 | | | | | | |
Description: Nine pounds per acre of sulphur dust was applied with a portable duster to the canopy of mature PB 5/51 on an estate in Negri Sembilan, on six occasions at intervals of five to seven days during post-wintering refoliation. Oldium + heveae secondary leaf fall was largely prevented and the foliage was retained throughout the year, in contrast to untreated plots where defoliation was severe and the canopy remained poor. Treatment had no effect on the yield of newly exploited trees, + but improved girth increment and the rate of bark renewal. Girth, bark renewal and yield were increased and weeds were suppressed in the case of trees which had been tapped for two years. Although the profit on the eight per cent increase in yield during+ the nine months after treatment, together with savings on weed control, did not cover the expense of dusting, the cost of treatment would have been recovered if the whole area had been treated with tractor-mounted equipment. The implication of these + findings is discussed with reference to the profitability of controlling Oidium secondary leaf fall in areas where it is habitually severe.

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collection(s): 1969
Identifier: vital1:30525
Format: application/pdf
Relation: 21,1,-,64,72
Relation: In: Proc Nat Rubb Conf, Kuala Lumpur 28 August - 5 September (1968). Kuala Lumpur : RRIM (1968): 64-72; J Rubb Res Inst Malaya (1969) 21(1):64-72
Rights: No|Yes
Type: Article
Source: JRRIM
Source: TARRC

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Wastie, R.L., Mainstone, B.J.. Economics of controlling secondary leaf fall of Hevea caused by Oidium Heveae Steinm. 20041201 | 20050114 | | 1969 | | | | | | |.

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1969

Economics of controlling secondary leaf fall of Hevea caused by Oidium Heveae Steinm

VITAL Repository 5.2