Studies on the foltap residue in betelvine leaves

Bhattacharya, A.; Chowdhury, A.; Das, Arindam; Dasgupta, B.; Sengupta, K.

doi:10.1080/09670878809371231

Cited by 3 publications

(1 citation statement)

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“…These have been recorded from time to time (Chattopadhyay 1967;Saxena, 1977;Sen et al, 1981;Khare et al, 1988;Dasgupta et al, 1988;Chattopadhyay and Maiti, 1990;Dasgupta '93;Dasgupta and Sen, '96;Maiti and Shivshankar, 1998;Dasgupta andSen, 1999 andDasgupta et al, 2000) and the consensus that emerges is that no efficient method of controlling the above two diseases of betelvine are available yet i.e., effective as well as safe. Moreover, a tiny amount of pesticide carried by the leaf would be hazardous to human health due to the residual toxicity of the pesticide as they are non-biodegradable and as the leaves are chewed directly, immediately after harvest (Bhattacharya et al, 1988;1989 and1992;Guha et al, 1990;Kar et al,1995). Moreover microclimate inside the baroj favours plant diseases which depend upon the canopy structure of the baroj.…”

Section: Introductionmentioning

confidence: 99%

Changes in crop canopy architecture on the incidence of major foliar diseases of betelvine (Piper betle L.)

Horticulture¹

2017

Preprint

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Betelvine (Piper betle L.) is a perennial dioecious creeper-belonging to the family Piperaceae usually grown under artificially erected structurals known as baroj that provides high moist and humid conditions favouring several diseases that in turn are major deterrents to good harvest. Betelvine suffers from many root and aerial diseases of which leaf rot caused by Phytophthora parasitica (Dastur) and leaf spot caused by Colletotrichum capsici Syd. (Butler and Bisby) are most important and are included in these studies for assessment. The extent of losses may vary from 20-40% for leaf rot and 10-20% for leaf spot, leading to almost total crop failure (Dasgupta and Sen, 1999). As the betel leaf is directly chewed immediately after harvest, it is not feasible to apply any pesticides that may cause toxic hazards to human being. An experiment was conducted for two consecutive years (2013 and 2014) to study the effect of different crop canopy by maintaining three different plant to plant spacing (viz. 11.1 cm. 9.53 cm. and 8.3 cm.) on leaf yield, disease incidence and keeping quality (days to 50% rotting) of betelvine. With the above plant to plant spacing and standard row to row spacing (60cm), the plant population was maintained as 1.50, 1.75 and 2.00 lakh ha -1. The results revealed that when crop canopy was increased by reducing the plant to plant spacing from 11.1 cm to 8.3 cm there were significant increases in both the diseases under investigation (rot disease 19.76% to 22.30%; leaf spot disease 22.68% to 25.42%). Significant increase in yield (26.29 to 33.63 lakh ha ), decrease in fresh weight of 100 leaves (460.85g to 432.35g) and decrease in keeping quality of leaves (13.14 days to 10.28 days) were recorded when crop canopy was increased by reduction in plant to plant spacing from 11.1 cm to 8.3 cm. From these results it can be concluded that shifts in microclimate resulting from increase in canopy by reducing the plant spacing aggravated the spread and infection of disease.

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Section: Introductionmentioning

confidence: 99%