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Author M. Sporleder |
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Refine your searchEfficacy of Metarhizium anisopliae (Metsch.) Sorokin against the Potato Tuber Moth, Phthorimaea operculella (Zeller) in Consumable Potato, under Laboratory Conditions / Pandey, S. in Nepalese Horticulture, v. 10: 1 ([07/25/2015])
Title : Efficacy of Metarhizium anisopliae (Metsch.) Sorokin against the Potato Tuber Moth, Phthorimaea operculella (Zeller) in Consumable Potato, under Laboratory Conditions Material Type: printed text Authors: Pandey, S., Author ; M. Sporleder, Author ; Y. D. Gharti Chhetry, Author ; Giri, Y.P., Author ; Jurgen Kroschel, Author Publication Date: 2015 Article on page: 55-62 p. Languages : English (eng) Abstract: The potato tuber moth Phthorimaea operculella (Zeller) (Lepidoptera:
Gelechiidae) is major pest of potato (Solanum tuberosum L.) in tropical and
subtropical regions of the world causing serious economic damage especially in
non-refrigerated potato storerooms. Chemical pesticide use for post-harvest pest
management in farmers’ rustic storerooms causes health risks to farmers and
consumers, triggered a search for safer pest management alternatives, such as
use of entomopathogens. Metarhizium anisopliae (Metsch.) Sorokin culture
originally isolated from white grub larvae native from Nepal was grown on
artificial media and its biological activity assessed against the potato tuber moth
in the laboratory, using potato tuber surface contamination bioassay. A total of
5 bioassays were conducted. In four bioassays fresh fungus stock suspensions
were tested while in one bioassay the fungus stock suspension of the first
bioassay was reused after 8-month storage period at ambient temperature. All
probit lines revealed a common slope of 0.57. The first stock suspension revealed
an LC50-value of 6.9×106 conidia/ml while after 8-month storage a significant
activity loss of about 90% (7.2 ×107 conidia/ml) was observed. The other three
bioassays revealed LC50-values of mean 4.2×105 (2.9 to 6.1×105) conidia/ml
without significant differences in their potencies. According to the probit lines
(3-5) > 7.5x10^7 conidia/ml would be required to kill >90% PTM. Hence it can
be concluded that the M. anisopliae strain showed high biological activity
against PTM larvae and has potential as bio-control agent for controlling the
pest; however, activity can be significantly reduced if stored inappropriately or
for longer periods.
in Nepalese Horticulture > v. 10: 1 [07/25/2015] . - 55-62 p.[article] Efficacy of Metarhizium anisopliae (Metsch.) Sorokin against the Potato Tuber Moth, Phthorimaea operculella (Zeller) in Consumable Potato, under Laboratory Conditions [printed text] / Pandey, S., Author ; M. Sporleder, Author ; Y. D. Gharti Chhetry, Author ; Giri, Y.P., Author ; Jurgen Kroschel, Author . - 2015 . - 55-62 p.
Languages : English (eng)
in Nepalese Horticulture > v. 10: 1 [07/25/2015] . - 55-62 p.
Abstract: The potato tuber moth Phthorimaea operculella (Zeller) (Lepidoptera:
Gelechiidae) is major pest of potato (Solanum tuberosum L.) in tropical and
subtropical regions of the world causing serious economic damage especially in
non-refrigerated potato storerooms. Chemical pesticide use for post-harvest pest
management in farmers’ rustic storerooms causes health risks to farmers and
consumers, triggered a search for safer pest management alternatives, such as
use of entomopathogens. Metarhizium anisopliae (Metsch.) Sorokin culture
originally isolated from white grub larvae native from Nepal was grown on
artificial media and its biological activity assessed against the potato tuber moth
in the laboratory, using potato tuber surface contamination bioassay. A total of
5 bioassays were conducted. In four bioassays fresh fungus stock suspensions
were tested while in one bioassay the fungus stock suspension of the first
bioassay was reused after 8-month storage period at ambient temperature. All
probit lines revealed a common slope of 0.57. The first stock suspension revealed
an LC50-value of 6.9×106 conidia/ml while after 8-month storage a significant
activity loss of about 90% (7.2 ×107 conidia/ml) was observed. The other three
bioassays revealed LC50-values of mean 4.2×105 (2.9 to 6.1×105) conidia/ml
without significant differences in their potencies. According to the probit lines
(3-5) > 7.5x10^7 conidia/ml would be required to kill >90% PTM. Hence it can
be concluded that the M. anisopliae strain showed high biological activity
against PTM larvae and has potential as bio-control agent for controlling the
pest; however, activity can be significantly reduced if stored inappropriately or
for longer periods.Field loss assessment of Potato Leaf Miner Fly (PLMF), Liriomyza huidobrensis (Blanchard) (Diptera:Agromyzidae) / K.N. Chiluwal
in Agricultural Research for Development: Proceedings of fourth SAS-N Convention, 4-6 April 2012, Lalitpur / Hira K. Manandhar
Title : Field loss assessment of Potato Leaf Miner Fly (PLMF), Liriomyza huidobrensis (Blanchard) (Diptera:Agromyzidae) Material Type: printed text Authors: K.N. Chiluwal, Author ; Thapa, R.B., Author ; Shrestha, S.M, Author ; M. Sporleder, Author Pagination: 172-178 p. Languages : English (eng) Abstract: With the aim to evaluate actual foliage loss due to potato leaf miner fly (PLMF), Liriomyza huidobrensis (Blanchard), survey sites were recognized from commercial potato pockets of Lalitpur, Kathmandu, Bhaktapur, Kavrepalanchwok, Sindhupalchwok and Makwanpur districts of Mid-Nepal in 2009. In total, 199 farmer's fields from 27 commercial potato pockets were visited and taken damage scores. The survey revealed that potato pockets of Lalitpur were the most prone area (89.3% foliage damage) to this pest followed by Kathmandu (82.6%), Bhaktapur (70%) and Kavrepalanchwok (46.5%). But damage level was comparatively lower in Sindhupalchwok (12.1%) and Makwanpur (27.9%). Damage level was found more in lower altitudes (790-1568 masl) than in higher altitudes (1560-2610 masl). Similarly, lower leaves were more damaged than the upper ones. So, altitude and plant age were two factors influencing damage by test insect. Since the pest is becoming severe and can withstand chemical sprays, it would be better to develop suitable IPM technique against this pest. Similarly, strict quarantine and awareness campaign against this insect pest are crucial to check its migration to virgin potato pockets.
Link for e-copy: http://elibrary.narc.gov.np/?r=1666 Field loss assessment of Potato Leaf Miner Fly (PLMF), Liriomyza huidobrensis (Blanchard) (Diptera:Agromyzidae) [printed text] / K.N. Chiluwal, Author ; Thapa, R.B., Author ; Shrestha, S.M, Author ; M. Sporleder, Author . - [s.d.] . - 172-178 p.
in Agricultural Research for Development: Proceedings of fourth SAS-N Convention, 4-6 April 2012, Lalitpur / Hira K. Manandhar
Languages : English (eng)
Abstract: With the aim to evaluate actual foliage loss due to potato leaf miner fly (PLMF), Liriomyza huidobrensis (Blanchard), survey sites were recognized from commercial potato pockets of Lalitpur, Kathmandu, Bhaktapur, Kavrepalanchwok, Sindhupalchwok and Makwanpur districts of Mid-Nepal in 2009. In total, 199 farmer's fields from 27 commercial potato pockets were visited and taken damage scores. The survey revealed that potato pockets of Lalitpur were the most prone area (89.3% foliage damage) to this pest followed by Kathmandu (82.6%), Bhaktapur (70%) and Kavrepalanchwok (46.5%). But damage level was comparatively lower in Sindhupalchwok (12.1%) and Makwanpur (27.9%). Damage level was found more in lower altitudes (790-1568 masl) than in higher altitudes (1560-2610 masl). Similarly, lower leaves were more damaged than the upper ones. So, altitude and plant age were two factors influencing damage by test insect. Since the pest is becoming severe and can withstand chemical sprays, it would be better to develop suitable IPM technique against this pest. Similarly, strict quarantine and awareness campaign against this insect pest are crucial to check its migration to virgin potato pockets.
Link for e-copy: http://elibrary.narc.gov.np/?r=1666 E-copies
http://nkcs.org.np/narc/dl/?r=1666URL
in Proceedigs of the Eighth National Horticulture Seminar on Horticulture Development Towards the Pace of National Economic Growth, Khumaltar, Lalitpur and Kirtipur, Kathmandu, 18-20 March 2013 (5-7 Chaitra 2069) / Nepal Horticulture Society
Title : Population Dynamics of Helicov_Erpa Armigera Hubner and Spodoptera Litura Fabricws: (Lepidoptera: Noctuidae) in Different Agroecological Condition of Nepal Material Type: printed text Authors: N. Dangi, Author ; S. Aryal, Author ; Shrestha, S., Author ; Giri, Y.P., Author ; M. Sporleder, Author Pagination: 79-82 p. Languages : English (eng) Keywords: Agro-ecology, Potato, Lepidoptera, Pheromones, Trap Abstract: The flight activity of two lepidopteron insect pests, Spodoptera litura and Helicoverpa armigera,
(Lepidoptera: Noctuidae) was monitored using sex pheromone traps during two consecutive vegetation
periods in 3 different potato field locations situated at altitudes of around 2500, 1500 and 650 mas/ in
Sindupalchowk, Kavrepa1anchowk and Dang district, respectively. Pheromone traps were installed at
three locations in each site and data were recorded at 2 days interval. Populations of the two pests
were observed the highest in Kavrepalanchowk during both vegetation period 2010111 and 2011112.
Data were pooled weekly and pheromone traps detected distinct peaks for S. litura in Sindupalchowk
on 10'h April (1034±219), Kavrepalanchowk on 6'h April (2932±224) and Dang on 20'1' November
(527±32) in 20101011. Likewise, in Kavrepalanchowk and Dang, the highest peak was observed on
22nd March (950±733) and IO'h November (747±468) during 20111012. respectively. Population of H.
armigera at Kavrepalanchowk peaked on 23nl March with an economically significant number
(373±38 per week in Tukucha VDC and 1207±359 per week in Panauti VDC) where as visible damage
was observed on potato foliage in 2011. In Dang, H. armigera moth captured reached its peak on 30'h
November (32±32 adult/week). This trend clearly indicated that these pests can outbreak at tuber
bulking and maturation stage of potato in all three ecological regions of Nepal. Therefore, these pests
cause severe economic damage during the vegetation period of the potato crop. These dates on which
the highest number of moths were trapped could be used as a benchmark to determine the occurrence
and population buikfup duration for these two species of moths. Understanding the pest population
dynamics are useful technical knowledge needed for researchers, technicians and· growers to decide
more precise timing for applying appropriate management options.Link for e-copy: http://elibrary.narc.gov.np/?r=1583 Population Dynamics of Helicov_Erpa Armigera Hubner and Spodoptera Litura Fabricws: (Lepidoptera: Noctuidae) in Different Agroecological Condition of Nepal [printed text] / N. Dangi, Author ; S. Aryal, Author ; Shrestha, S., Author ; Giri, Y.P., Author ; M. Sporleder, Author . - [s.d.] . - 79-82 p.
in Proceedigs of the Eighth National Horticulture Seminar on Horticulture Development Towards the Pace of National Economic Growth, Khumaltar, Lalitpur and Kirtipur, Kathmandu, 18-20 March 2013 (5-7 Chaitra 2069) / Nepal Horticulture Society
Languages : English (eng)
Keywords: Agro-ecology, Potato, Lepidoptera, Pheromones, Trap Abstract: The flight activity of two lepidopteron insect pests, Spodoptera litura and Helicoverpa armigera,
(Lepidoptera: Noctuidae) was monitored using sex pheromone traps during two consecutive vegetation
periods in 3 different potato field locations situated at altitudes of around 2500, 1500 and 650 mas/ in
Sindupalchowk, Kavrepa1anchowk and Dang district, respectively. Pheromone traps were installed at
three locations in each site and data were recorded at 2 days interval. Populations of the two pests
were observed the highest in Kavrepalanchowk during both vegetation period 2010111 and 2011112.
Data were pooled weekly and pheromone traps detected distinct peaks for S. litura in Sindupalchowk
on 10'h April (1034±219), Kavrepalanchowk on 6'h April (2932±224) and Dang on 20'1' November
(527±32) in 20101011. Likewise, in Kavrepalanchowk and Dang, the highest peak was observed on
22nd March (950±733) and IO'h November (747±468) during 20111012. respectively. Population of H.
armigera at Kavrepalanchowk peaked on 23nl March with an economically significant number
(373±38 per week in Tukucha VDC and 1207±359 per week in Panauti VDC) where as visible damage
was observed on potato foliage in 2011. In Dang, H. armigera moth captured reached its peak on 30'h
November (32±32 adult/week). This trend clearly indicated that these pests can outbreak at tuber
bulking and maturation stage of potato in all three ecological regions of Nepal. Therefore, these pests
cause severe economic damage during the vegetation period of the potato crop. These dates on which
the highest number of moths were trapped could be used as a benchmark to determine the occurrence
and population buikfup duration for these two species of moths. Understanding the pest population
dynamics are useful technical knowledge needed for researchers, technicians and· growers to decide
more precise timing for applying appropriate management options.Link for e-copy: http://elibrary.narc.gov.np/?r=1583 E-copies
http://nkcs.org.np/narc/dl/?r=1583URL
