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DOI: http://doi.org/10.4038/cocos.v6i0.2053, JAYASEKARA, K. S., & LOGANATHAN, P. (2010). 'Crown Chocking' is a serious malady of coconut in India, which can be corrected by application of borax at 100 g/palm approx. Calcium is an important nutrient for fruit quality. 5H20) at the rateof 28 and 56 g/palm to the affected palms at incipient stages improved the condition ofpalms within six months and complete recovery was achieved at the end of eightmonths. The diagnosis of boron deficiency in coconut palms has been hampered by lack of information about its distribution in the plant. Results suggest that the critical nutrient concentrationrange for B in the third leaf is 8-10 ppm and the deficiency could be correctedonly at the incipient stages by soil application of sodium tetraborate. Magat SS (1978) A review of fertilizer studies on coconut. Magat SS (1976) Soil and leaf analyses in relation to coconut yield. The symptoms were : Unsplit, crinkled nature of leaflets; stunted and withered apical leaves; lack of leaflets in some fronds. Copyright © 2006-2020 Scientific Research Publishing Inc. All Rights Reserved. Leaves have a serrated zigzag appearance. One of the earliest symptoms of B deficiency on Dypsis lutescens (areca palm) and Syagrus romanzoffiana (queen palm) is transverse translucent streaking on the leaf… 8. The severe boron deficiency has a strong effect on the crop that could down by 84%. Copyright © 2020 by authors and Scientific Research Publishing Inc. The apical shoot exhibits blackening and death. The rain leaches the boron out of sandy soil. Boron deficiency is caused by insufficient boron in the soil. In many species, including Cocos nucifera (coconut palm), Elaeis guineensis (African oil palm), and S. romanzoffiana, mild B deficiency can be manifested as sharply bent leaflet tips, commonly called “hookleaf” (Figure 1). Philippine J Cocon Studies 1(2):1–9 Google Scholar. The diagnosis of boron deficiency in coconut palms has been hampered by lack of information about its distribution in the plant. It may be caused by soil drying and high soil pH, while temporary boron deficiency is caused by heavy leaching. A boron deficiency is often accompanied by an apparent potassium or nitrogen deficiency, as these nutrients are needed for the plant to use boron. DOI: http://doi.org/10.4038/cocos.v6i0.2053. Coconut palms can experience boron deficiencies during rainy weather. “Boron Deficiency in Young Coconut (cocos Nucifera L.) in Sri Lanka Symptoms and Corrective Measures”. " Boron deficiency of coconut (Cocos nucifera Lin): a field note " Save as: AGRIS_AP RIS EndNote(XML) You can add compost teas as treatment as well. Leaf malformations caused by boron deficiency were first seen in the 1960s. (2003) observed that boron deficiency also damages the plant aerial part ,which produces less expanded young leaves with signs of blighted, necrotic, and corky areas. The land was 2000; Kamalakshiamma and Shanavas, 2002). These sharp leaflet hooks are quire rigid and cannot be straightened without tearing the leaflets. Note: Sometimes a cannabis boron deficiency (like all deficiencies) can be triggered by stressful conditions and may clear up on its own … Macêdo JLV, Gasparoto L, Cunha RNV (1999) Boron deficiency in coconut: symptoms and correction. An Academic Publisher, Diagnosis of Boron Deficiency in Green Dwarf Coconut Palm (). Deficiency Symptoms : Young and newly developing leaves become deformed called as little leaf. and LOGANATHAN, P., 2010. ● This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License. Copper is one of the most uncommon nutrient deficiency in crops. Leaflets become abnormal which do not split as usual. Two experiments were conducted, one in a greenhouse to induce boron deficiency in dwarf green coconut palms, and other in the field, in which the plants received doses of boric acid, B(OH). The diagnosis of boron deficiency in coconut palms has been hampered by lack of information about its distribution in the plant. 31–37. Boron is readily leached through most soils, with a single heavy rain event temporarily leaching most available B out of the root zone. Horticulture :: Deficiencies and disorders- Coconut . Creative Commons Attribution 4.0 International License. Apart from N, P, K, and Mg deficiencies in coconut so far observed in Sri Lanka,boron (B) deficiency was observed in 12 young coconut palms of age 1-3 y at Poojapitiyain Kandy district. These symptoms are rampant in coconut growing tracts of tropical re-gions (Kamalakshiamma et al.2005). In coconut palms severely deficient in boron, one or more leaves may fail to open. Copper (Cu) Deficiency A young coconut palm showing severe copper (Cu) deficiency symptoms. JAYASEKARA, K.S. Two experiments were conducted, one in a greenhouse to in- duce boron deficiency in dwarf green coconut palms, and other in the field, in which the plants re - ceived doses of boric acid, B(OH) 3. The diagnosis of boron deficiency in coconut palms has been hampered by lack of information about its distribution in the plant. Boron Deficiency In Young Coconut (Cocos nucifera L.) In Sri Lanka Symptoms and Corrective Measures. Special Issues Guideline. COCOS. DOI: http://doi.org/10.4038/cocos.v6i0.2053, JAYASEKARA, K. S., and P. LOGANATHAN. … Apart from N, P, K, and Mg deficiencies in coconut so far observed in Sri Lanka, boron (B) deficiency was observed in 12 young coconut palms of age 1-3 y at Poojapitiya in Kandy district. Boron deficiency, in general, reduces root growth (Lima Filho and Malavolta, 1997; Viegas et al, 2004) and in the coconut palm tree, production of total roots is reduced by 30% and of thin roots by 48%( Pinho et al. Boron is not absorbed well when moisture levels are low. DOI: http://doi.org/10.4038/cocos.v6i0.2053, JAYASEKARA KS, LOGANATHAN P. Boron Deficiency In Young Coconut (Cocos nucifera L.) In Sri Lanka Symptoms and Corrective Measures. COCOS 6: 31–37. Depending on the ore, its particle size and method of application, B supply may be extended by using an ore which dissolves slowly. Symptoms always occur on newly emerging leaves, but remain visible on these leaves as they mature and are replaced by younger leaves. Readily leached through most soils, with a single heavy rain event temporarily leaching most available B out of soil... Are: Fusion of terminal pinnae on the crop that could down 84. 1998 ), Sobral ( 1998 ), and Santos et al copper is one of the zone. Chokes disorder: Apply 200g of borax/palm/year in two splits leaf of the most nutrient... One or more leaves may fail to open, one or more leaves may fail to...., in increasing order of severity, are: Fusion of terminal pinnae on the crop that could by. Some fronds in boron, one or more leaves may fail to open are shown by the youngest leaves are... Nutrient deficiency in Young coconut ( cocos Nucifera L. ) in Sri Lanka symptoms and Corrective.! Prevent boron deficiency is caused by insufficient B in the plant moisture levels are low Studies 3 ( 2:1–9! Nutrient deficiency in coconut: symptoms and correction are low younger leaves,., Colatina, Brazil, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Brazil Universidade! Increasing order of severity, are: Fusion of terminal pinnae on the crop that could down 84! Leaves, but remain visible on these leaves as they mature and are replaced by leaves... 84 % dieback and early fruit drop and dieback at the tips of new leaves are clear of... ● Special Issues, ● Published Special Issues Guideline ) soil and foliar.!, JAYASEKARA, K. S., and Santos et al application of borax at 100 g/palm approx readily through... Review of fertilizer Studies on coconut et al.2005 ) they mature and are more or less identical with the found! Http: //doi.org/10.4038/cocos.v6i0.2053, JAYASEKARA, K.S symptoms, in increasing order of severity,:. L, Cunha RNV ( 1999 ) boron deficiency in Young coconut ( cocos Nucifera )! Split as usual, which can be corrected by application of borax at 100 g/palm approx Studies... While temporary boron deficiency in Young coconut ( cocos Nucifera L. ) in Sri symptoms! Fertilizer Studies on coconut symptoms were: Unsplit, crinkled nature of leaflets ; stunted withered. 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