Les nématodes parasites associés au riz dans les trois (3) principales écologies rizicoles au Burkina Faso

Abstract

RESUMEUn inventaire des nématodes parasites du riz au Burkina Faso a été réalisé au cours de la campagne agricole humide 2016-2017. Ce travail de recherche vise à étudier la prévalence et l'abondance des principaux nématodes parasites associés au riz dans les 3 principales écologies rizicoles que sont la riziculture pluviale stricte, la riziculture de bas-fond et la riziculture irriguée. Pour cela, 156 échantillons de racines de riz et de sols attenantsont été prélevés dans 40 sites de production de riz; les nématodes ont été extraits du sol et des racines. Les résultats montrent quatorze (14) Plant parasitic nematodes associated to rice in the three (3) main riceecologies of Burkina Faso ABSTRACT A survey of rice parasitic nematodes has been conducted in Burkina Faso during the rainy crop season 2016-2017. This research aimedat studying the occurrence and abundance of rice parasitic nematodes in the 3 main rice ecologies (upland rainfed, lowland and irrigated rice). For that, 156 samples of roots and adjacent soils were collected at 40 locations of rice production. The extraction of nematodes was done B. THIO et al. / Int. J. Biol. Chem. Sci. 11(3): 1178-1189, 2017 1179 according to the methods of Seinhorst (1950Seinhorst ( , 1962. The results showed that 14 genera of parasitic nematodes were identified. Hirschmanniella and Tylenchorhynchus were frequent and abundant in lowland and irrigated rice ecologies because observed in more than 50% of the samples with nematode population levels higher to 200 nematodes/dm 3 of soils and 20 nematodes/g of roots. Tylenchorhynchus, Helicotylenchus and Scutellonema were observed in upland rice. Meloidogyne, Heterodera and Pratylenchus were observed in the lowland and upland rice ecologies. These 7 groups of nematodes can be considered as the most damaging to rice in these ecologies and are susceptible to cause significant damages if the conditions are good for their multiplication.

Evaluation of Soybean Genotypes (<i>Glycine max</i> L. Merr.) Susceptibility to Parasitic Nematodes in Western Part of Burkina Faso

“…Among these parasitic nematodes associated in soybean, the specie Pratylenchus brachyurus is known to be one of the most damaging [13] [20] [21]. Similar studies on parasitic nematodes of rice in Burkina Faso have isolated species of the genera Meloidogyne, Heterodera, Scutellonema, and Pratylenchus in strict rainfed and lowland ecologies [22]. [23] reported the impact of soil parasitic nematodes Pratylenchus brachyurus on cowpea production despite the use of different levels of mineral fertilization to control its colonization in Burkina Faso.…”

Occurrence, abundance and distribution of plant-parasitic nematodes associated with rice (<i>Oryza</i> spp.) in different rice agroecosystems in Togo

“…These results confirm those of several research studies on rice parasitic nematode communities. Indeed, several studies have noted the predominance of nematodes belonging to the genus Hirschmanniella known as the most frequent and most damaging to rice in lowland and irrigated ecologies (Coyne et al, 2000;Ravichandra et al, 2003;Bridge et al, 2005;Maung et al, 2010;Udo et al, 2011;Thio et al, 2017).…”

Penapisan Pendahuluan Berbagai Aksesi Padi (Oryza sativa L) Terhadap Serangan Hama Serangga dan Nematoda Parasit Tanaman

“…Netscher dan Erlan (1993) melaporkan bahwa M. graminicola menyebabkan kehilangan hasil padi gogo di Indonesia antara 28 hingga 87%. H. oryzae adalah nematoda parasit tanaman yang paling umum ditemukan pada padi irigasi dan paling merusak pada tanaman padi di dataran rendah (Bridge et al, 2005: Maung et al, 2010Udo et al, 2011;Thio et al, 2017).). H. oryzae dapat menyebabkan kehilangan hasil beras sebesar 42% di Myanmar (Fortuner, 1974).…”