The effect of mixed cultivars plantings on pest abundance and grain yields in rice

<p>A field study was carried out to assess the effects of mixed cultivar plantings on grain yields and on the abundance of pests in rice. Increasing plantation species diversity through cultivar mixtures is often claimed to decrease pest problems while stabilizing or even increasing yield, but...

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Autores principales:	Azri Kusuma Dewi, Hermanu Triwidodo, Muhammad Achmad Chozin, Hajrial Aswidinnoor
Formato:	article
Lenguaje:	EN ID
Publicado:	The Entomological Society of Indonesia 2019
Materias:	brown plant-hoppers cultivars mixture rice row mix seed mix stems borers Zoology QL1-991
Acceso en línea:	https://doaj.org/article/3e53d0d69246499aacdf2fe4ee4b3c6d
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spelling	oai:doaj.org-article:3e53d0d69246499aacdf2fe4ee4b3c6d2021-12-02T05:16:24ZThe effect of mixed cultivars plantings on pest abundance and grain yields in rice1829-77222089-025710.5994/jei.15.2.101https://doaj.org/article/3e53d0d69246499aacdf2fe4ee4b3c6d2019-04-01T00:00:00Zhttp://jurnal.pei-pusat.org/index.php/jei/article/view/534https://doaj.org/toc/1829-7722https://doaj.org/toc/2089-0257<p>A field study was carried out to assess the effects of mixed cultivar plantings on grain yields and on the abundance of pests in rice. Increasing plantation species diversity through cultivar mixtures is often claimed to decrease pest problems while stabilizing or even increasing yield, but the effects on pest abundance of planting rice cultivar mixtures in Indonesia have not been extensively studied. We tested for changes in pest abundance in experimental plots planted with five genetically distinct rice cultivars, combined in two different mixture arrangements (seed mix and row mix). These mixes were cultivated in lowland paddy areas, in replicated randomized block designs, during two growing seasons. Pest abundance was measured weekly in all plots, and rice yields were measured at harvest time. The results showed that the average abundance of pests was reduced in plots planted with cultivar mixes, compared to those planted with monocrops comprised of each of the component cultivars. Plots planted with the seed mix showed consistently reduced brown plant-hopper (<em>Nilaparvata lugens</em> (Stål)) abundance compared to monocrops in each growing season, with a relative reduction in pest abundance of 29.83% at the end of season 1 and 6.61% at the end of season 2, respectively. Plots planted with the row mix consistently showed decreased stem borer abundance compared to monocrops in each growing season, with a relative reduction in pest abundance of 100% at the end of season 1 and 1.4% at the end of season 2, respectively. In terms of yield, plant height proved to be a consistent yield component character, correlating positively with plant yield for both seed mix and row mix in both growing seasons. Our results showed higher average yields –and plant heights--for the mixed genotype plots compared to pure genotype stands in 2013. We found a greater relative increase in the yield of seed mix plots than row mix, measuring 7.26% and 4.63%, respectively in 2013. Among the two types of mixtures, seed mix showed higher overall grain yield. Our findings suggest that rice farmers can both increase yield and decrease pest abundance by planting cultivar mixes.</p>Azri Kusuma DewiHermanu TriwidodoMuhammad Achmad ChozinHajrial AswidinnoorThe Entomological Society of Indonesiaarticlebrown plant-hopperscultivars mixturericerow mixseed mixstems borersZoologyQL1-991ENIDJurnal Entomologi Indonesia, Vol 15, Iss 2 (2019)
institution	DOAJ
collection	DOAJ
language	EN ID
topic	brown plant-hoppers cultivars mixture rice row mix seed mix stems borers Zoology QL1-991
spellingShingle	brown plant-hoppers cultivars mixture rice row mix seed mix stems borers Zoology QL1-991 Azri Kusuma Dewi Hermanu Triwidodo Muhammad Achmad Chozin Hajrial Aswidinnoor The effect of mixed cultivars plantings on pest abundance and grain yields in rice
description	<p>A field study was carried out to assess the effects of mixed cultivar plantings on grain yields and on the abundance of pests in rice. Increasing plantation species diversity through cultivar mixtures is often claimed to decrease pest problems while stabilizing or even increasing yield, but the effects on pest abundance of planting rice cultivar mixtures in Indonesia have not been extensively studied. We tested for changes in pest abundance in experimental plots planted with five genetically distinct rice cultivars, combined in two different mixture arrangements (seed mix and row mix). These mixes were cultivated in lowland paddy areas, in replicated randomized block designs, during two growing seasons. Pest abundance was measured weekly in all plots, and rice yields were measured at harvest time. The results showed that the average abundance of pests was reduced in plots planted with cultivar mixes, compared to those planted with monocrops comprised of each of the component cultivars. Plots planted with the seed mix showed consistently reduced brown plant-hopper (<em>Nilaparvata lugens</em> (Stål)) abundance compared to monocrops in each growing season, with a relative reduction in pest abundance of 29.83% at the end of season 1 and 6.61% at the end of season 2, respectively. Plots planted with the row mix consistently showed decreased stem borer abundance compared to monocrops in each growing season, with a relative reduction in pest abundance of 100% at the end of season 1 and 1.4% at the end of season 2, respectively. In terms of yield, plant height proved to be a consistent yield component character, correlating positively with plant yield for both seed mix and row mix in both growing seasons. Our results showed higher average yields –and plant heights--for the mixed genotype plots compared to pure genotype stands in 2013. We found a greater relative increase in the yield of seed mix plots than row mix, measuring 7.26% and 4.63%, respectively in 2013. Among the two types of mixtures, seed mix showed higher overall grain yield. Our findings suggest that rice farmers can both increase yield and decrease pest abundance by planting cultivar mixes.</p>
format	article
author	Azri Kusuma Dewi Hermanu Triwidodo Muhammad Achmad Chozin Hajrial Aswidinnoor
author_facet	Azri Kusuma Dewi Hermanu Triwidodo Muhammad Achmad Chozin Hajrial Aswidinnoor
author_sort	Azri Kusuma Dewi
title	The effect of mixed cultivars plantings on pest abundance and grain yields in rice
title_short	The effect of mixed cultivars plantings on pest abundance and grain yields in rice
title_full	The effect of mixed cultivars plantings on pest abundance and grain yields in rice
title_fullStr	The effect of mixed cultivars plantings on pest abundance and grain yields in rice
title_full_unstemmed	The effect of mixed cultivars plantings on pest abundance and grain yields in rice
title_sort	effect of mixed cultivars plantings on pest abundance and grain yields in rice
publisher	The Entomological Society of Indonesia
publishDate	2019
url	https://doaj.org/article/3e53d0d69246499aacdf2fe4ee4b3c6d
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The effect of mixed cultivars plantings on pest abundance and grain yields in rice

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