Studies on copper deficiency in mango, guava and jackfruit.
Agarwala S. C., Nautiyal B. D., Sharma C. P., Chatterjee C.
Author Affiliation: Department of Botany, Lucknow University, Lucknow, India.
Indian Journal of Horticulture 48 : 192-200
Abstract : Mango (cv. Dashehari), guava (cv. Safeda) and jackfruit saplings were planted in sand in 12-litre containers. Cu was applied at 0.00065, 0.0065 and 0.065 mg/litre. Nutrient solution was applied daily for 6 days with distilled water being applied every 7th day. Deficiency symptoms with Cu supplied at only 0.00065 mg/litre were first observed at week 35 in mango, at week 24 in guava, and at week 48 in jackfruit. The depression in DM content caused by Cu deficiency was highest in jackfruit and lowest in guava. The acutely deficient (0.00065 mg Cu/litre) leaves of mango, guava and jackfruit plants contained, 2.7-3.8, 2.1-3.0 and 4.2-5.7 µg Cu/g DM, respectively, compared with 7.4-10.2, 9.6-12.4 and 13.5-19.1 µg Cu/g DM from Cu sufficient (0.065 mg Cu/litre) leaves of the same species, respectively.