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Bio-efficacy of some plant leaf extracts against mustard aphid, Lipaphis erysimi Kalt. on Indian mustard, Brassica juncea

100%

Ali A., Rizvi P. Q., Khan F. R.

Journal of Plant Protection Research

2010

tom 50

nr 2

130-132

The bio-efficacy of four plant leaf extracts viz., apple of sodom, Calotropis procera Aiton; Mexican poppy, Argemone mexicana Linnaeus; Mexican marigold, Tagetes minuta Linnaeus and Indian neem, Azadirachta indica were tested against mustard aphid, Lipaphis erysimi on Indian mustard, Brassica juncea. The highest per cent aphid reduction during first, second and third spray were 28.79, 40.52 and 59.32 at 1 : 10 g/ml; 34.70, 44.49 and 66.14 at 1 : 5 g/ml and 53.88, 64.84 and 100.00 at 1 : 2.5 g/ml with Indian neem. However, Mexican marigold was also effective at highest concentration (1 : 2.5 g/ml) and reduced 96.38 per cent L. erysimi. All the treatments of plant leaf extracts showed insecticidal activity, but Indian neem followed by Mexican marigold reduced the aphid population to a great extent.

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Spatial distribution of early blight disease on tomato, climatic factors and bioefficacy of plant extracts against Alternaria solani

67%

Hussain A., Ali S., Abbas H., Ali H., Hussain A., Khan S. W.

Acta Scientiarum Polonorum. Hortorum Cultus

2019

tom 18

nr 6

Information on the spatial variability in plant disease is essential for location-based disease management. In the current study, the spatial distribution of tomato early blight disease was ascertained in District Gilgit, GilgitBaltistan, Pakistan. The comprehensive field survey was carried in two growing seasons (2014–2015), whereas in each growing season, 62 tomato fields were surveyed. Based on the distribution of disease, the respective thematic maps (incidence and severity) were prepared using Arc Map 10.1 with spatial analyst function of Arc GIS software by means of the inverse distance weight (IDW) interpolation method. Results indicate that early blight of tomato is spatially distributed in both growing seasons. However, in the first growing season, the disease incidence ranged from 10.22% to 44.16% and during later season 14.03–49.16%, whereas 5.37–16.40% and 6.52–26.94% severity was recorded. Furthermore, this information indicates that higher disease infestation occurred in 2015 in relation to 2014. This information linked to metrological data (temperature, precipitation and relative humidity), seemingly favored the early blight development during the growing period. Seven botanical extracts were tested against pathogen Alternaria solani at different concentrations (4, 6 and 8%). Results revealed that all tested plant extracts showed antifungal activities. However, at 8% concentration of plant extract, Datura starmonium, Berberis orthobotry, Podophyllum emodi and Uretica dioica exhibited >60%, while Peganum harmala, Artemisia maritima and Capparis spinosa <60% antifungal properties. The information generated due to this study could help the tomato growers regarding disease management and selection of resistant cultivars, improving profitability and food security in the Gilgit region.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Journal of Plant Protection Research

1 Abbas H.

1 Ali A.

1 Ali H.

1 Ali S.

1 Hussain A.

1 Khan F. R.

1 Khan S. W.

1 Rizvi P. Q.

1 2019

1 2010

Wyniki wyszukiwania

Bio-efficacy of some plant leaf extracts against mustard aphid, Lipaphis erysimi Kalt. on Indian mustard, Brassica juncea

Spatial distribution of early blight disease on tomato, climatic factors and bioefficacy of plant extracts against Alternaria solani