Tolerance indicators and responses of rice cultivars to infestation by the African rice gall midge, Orseolia oryzivora

2002 ◽  
Vol 139 (3) ◽  
pp. 335-340 ◽  
Author(s):  
A. A. OMOLOYE ◽  
J. A. ODEBIYI ◽  
C. T. WILLIAMS ◽  
B. N. SINGH
Keyword(s):  
Grain Yield ◽  
Seedling Survival ◽  
Gall Midge ◽  
Plant Responses ◽  
International Institute ◽  
Rice Cultivars ◽  
Infested Plant ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Rice Gall Midge

The mechanisms and host plant responses that are indicative of tolerance to the African rice gall midge, Orseolia oryzivora Harris & Gagne were investigated in four promising donor rice cultivars, Cisadane, Bw 348-1, Tox 4093-17-1 and ITA 306 (local check), in a screen house at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria. Results indicated that Cisadane was tolerant to infestations on the basis of higher (P<0.05) percentage seedling survival, production of significantly higher number of fertile tillers, productive panicles and significantly higher grain yield per infested plant than the control. Both single infestation at one larva per plant and adult infestation once at 14 days after seeding were positively correlated to higher fertile tiller production per infested plant (at 80 days after transplanting) and higher grain yield per infested plant at maturity. The grain yield per infested plant was significantly higher (P<0.05) in the tolerant variety (Cisadane) than in the control.

An antixenosis component of rice resistance to African rice gall midge, Orseolia oryzivora

2009 ◽  
Vol 34 (0) ◽  
Author(s):  
FE Nwilene ◽  
O Okhidievbie ◽  
TA Agunbiade ◽  
AK Traore ◽  
LN Gaston ◽  
...  
Keyword(s):  
Gall Midge ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Rice Gall Midge

scholarly journals Comparative Study of the Morphology of the Ovipositor ofPlatygaster diplosisae(Hymenoptera: Platygasteridae) andAprostocetus procerae(Hymenoptera: Eulophidae) Two Parasitoids Associated with the African Rice Gall Midge,Orseolia oryzivora(Diptera: Cecidomyiidae)

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Souleymane Nacro ◽  
Jean-Pierre Nénon
Keyword(s):  
Resource Sharing ◽  
Gall Midge ◽  
Distal Portion ◽  
Life Stages ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Larval Host ◽  
Rice Gall Midge ◽  
Platygaster Diplosisae ◽  
Selection Of

We studied the morphology of the ovipositor ofPlatygaster diplosisae(Hymenoptera: Platygasteridae) andAprostocetus procerae(=Tetrastichus pachydiplosisae) (Hymenoptera: Eulophidae), two parasitoids associated with the African rice gall midge (AFRGM), andOrseolia oryzivora(Diptera: Cecidomyiidae). Scanning electron microscope techniques were used for this study. The ovipositor ofP. diplosisaewas short (40 μm), and most of the sensillae found on it were mechanoreceptors and located on the distal portion of the 3rd valvulae. These sensillae may be involved in selection of an egg or larval host. The shortness of this ovipositor may be an adaptation to a host whose egg envelope thickness is not more than 0.7 μm. The ovipositor ofA. proceraewas 30 times (1.2 mm) the length of theP. diplosisaeovipositor. It was not only well equipped with mechanoreceptive sensillae, but these sensillae were very diverse and distributed along the length of the valvulae. The 10 denticulations of the lancet of this ovipositor allow this parasitoid to exploit hosts that are not otherwise readily accesible. These two parasitoids share the same resource by infesting different life stages of the host. The ovipositor of each species of parasitoid enhanced resource sharing, due to its length and its sensillae type and distribution.

Orseolia oryzivora. [Distribution map].

1984 ◽  
Author(s):  
Keyword(s):  
Burkina Faso ◽  
Geographical Distribution ◽  
Ivory Coast ◽  
Gall Midge ◽  
Distribution Map ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Guinea Bissau ◽  
Rice Gall Midge ◽  
New Distribution

Abstract A new distribution map is provided for Orseolia oryzivora Harris & Gagné [Diptera: Cecidomyiidae] African rice gall midge. Attacks rice and probably related grasses, especially Oryza spp. Information is given on the geographical distribution in AFRICA, Benin, Burkina, Faso, Cameroon, Gambia, Guinea-Bissau, Ivory Coast, Malawi, Mali, Niger, Nigeria, Senegal, Sudan, Togo, Zambia.

Description of the African rice gall midge, Orseolia oryzivora sp. n., with comparative notes on the ASian rice gall midge, O. oryzae (Wood-Mason) (Diptera: Cecidomyiidae)

1982 ◽  
Vol 72 (3) ◽  
pp. 467-472 ◽  
Author(s):  
K. M Harris ◽  
R. J. Gagné
Keyword(s):  
Gall Midge ◽  
Morphological Characters ◽  
Undescribed Species ◽  
Cultivated Rice ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Asian Rice ◽  
Rice Gall Midge ◽  
Major Pest ◽  
Upper Volta

AbstractThe African rice gall midge, Orseolia oryzivora sp. n., is described and illustrated from adults of both sexes, larvae and pupae collected in West Africa. This species had previously been misidentified as O. oryzae (Wood-Mason), which is a major pest of rice in Asia, but the two species are morphologically distinct in the larval, pupal and adult stages. All available African material has been examined, and O. oryzivora is recorded from cultivated rice in Senegal, Upper Volta, Ivory Coast, Nigeria and the Sudan. Larvae and pupae collected from Paspalum in Upper Volta differ from typical O. oryzivora in some morphological characters and probably represent an undescribed species of Orseolia

scholarly journals The host range, annual cycle and parasitoids of the African rice gall midge Orseolia oryzivora (Diptera: Cecidomyiidae) in central and southeast Nigeria

1999 ◽  
Vol 89 (6) ◽  
pp. 589-597 ◽  
Author(s):  
C.T. Williams ◽  
O. Okhidievbie ◽  
K.M. Harris ◽  
M.N. Ukwungwu
Keyword(s):  
Host Range ◽  
Annual Cycle ◽  
Wild Rice ◽  
Gall Midge ◽  
Dry Season ◽  
Cropping Pattern ◽  
Wet Season ◽  
Orseolia Oryzivora ◽  
African Rice ◽  
Rice Gall Midge

AbstractHost range experiments and field sampling in Nigeria produced no evidence that African rice gall midge, Orseolia oryzivora Harris – Gagné, can develop on plants other than Oryza species. Sampling in three outbreak areas during 1994 showed that the insect's annual cycle varied according to the agroecological zone and rice cropping pattern. In the humid forest zone, Orseolia oryzivora persisted through the short dry season on ratoons of cultivated rice Oryza sativa at a rainfed site and on dry season rice crops at an irrigated one. In contrast, at rainfed sites in the moist savannah zone the pest survived the longer dry season on the perennial wild rice O. longistaminata, while ratoons and volunteers of O. sativa provided 'bridges' between the wild host and wet season rice crops. Early in the wet season at rainfed sites, galls of Orseolia oryzivora were not found at high density on wild rice, ratoons or volunteers. The heavy infestations which developed by October resulted primarily from rapid multiplication on rice crops themselves during the wet season. At all 13 sites sampled, the large majority of galls were found on fallow or cropped rice fields, rather than in ditches, bunds or uncultivated wetland, irrespective of the time of year or the hosts involved. From gall dissections, the parasitoids Aprostocetus procerae (Risbec) and Platygaster diplosisae Risbec caused over 30% mortality at some sites by October but generally increased too late to prevent crop damage. Implications of the results for the management of Orseolia oryzivora are discussed.

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