Jatropha curcas is subject to the attacks of many insect pests, including Calidea panaethiopica Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, fruit and seeds of the shrub resulting ...Jatropha curcas is subject to the attacks of many insect pests, including Calidea panaethiopica Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, fruit and seeds of the shrub resulting in quantitative and qualitative losses;the shrub is also attacked by Aphthona whitfieldi Bryan (Coleoptera: Chrysomelidae) which feeds on the leaves causing complete defoliation in severe attack. Despite their economic importance, very little is known about the alternative host plants of these insect pests. The study of the ecology of these species is a pre-requisite for the development of appropriate control methods. The identification of alternative host plants of C. panaethiopica and A. whitfieldi was conducted from June 3rd 2013 to November 30th 2014 in the Sissili province, South Burkina Faso. During that period, four J. curcas’ plantations of six locations in the province were prospected for alternative host plants of the two insect pests. In each plantation, observations were done across a diagonal up to 500 m away from the plantation. Fallows in the vicinity of the J. curcas plantations were particularly examined. Potential host plants of the two insect pests were collected and bred in the laboratory in Léo where they were used to feed the insect pests. Only Jatropha gossypiifolia, a cousin of J. curcas, was found to be a common alternative host plant of both insect pests.展开更多
<i>Jatropha curcas</i> is subject to the attacks of many insect pests, including <i>Calidea panaethiopica</i> Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, f...<i>Jatropha curcas</i> is subject to the attacks of many insect pests, including <i>Calidea panaethiopica</i> Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, fruit and seeds of the shrub resulting in quantitative and qualitative losses;the shrub is also attacked by <i>Aphthona whitfieldi</i> Bryan (Coleoptera: Chrysomelidae) which feeds on the leaves causing complete defoliation in severe attack. Despite their economic importance, very little is known about the alternative host plants of these insect pests. The study of the ecology of these species is a pre-requisite for the development of appropriate control methods. The identification of alternative host plants of <i>C. panaethiopica</i> and <i>A. whitfieldi</i> was conducted from June 3rd 2013 to November 30th 2014 in the Sissili province, South Burkina Faso. During that period, four <i>J. curcas</i>’ plantations of six locations in the province were prospected for alternative host plants of the two insect pests. In each plantation, observations were done across a diagonal up to 500 m away from the plantation. Fallows in the vicinity of the <i>J. curcas</i> plantations were particularly examined. Potential host plants of the two insect pests were collected and bred in the laboratory in Léo where they were used to feed the insect pests. Only <i>Jatropha gossypiifolia</i>, a cousin of <i>J. curcas</i>, was found to be a common alternative host plant of both insect pests.展开更多
Prostephanus truncatus （Horn） is a notorious stored grain insect pest established in Tanzania in late 1970s and currently threatening the maize industry of Zimbabwe. The devastating effects of the pest attack, deman...Prostephanus truncatus （Horn） is a notorious stored grain insect pest established in Tanzania in late 1970s and currently threatening the maize industry of Zimbabwe. The devastating effects of the pest attack, demands adequate preparation including identification of the potential invasion areas for more focused planning towards its effective management. In the current study, the potential P. truncatus invasion areas in Zimbabwe were identified based on climatic data with reference to the Tanzania situation using the geographical information system （GIS） Almanac Characterization Tool （AWhere-ACT 3.5 software）. Areas identified to be at greatest risk of invasion includes the northern part of the country, the southern-east region and a few areas in the east （Manicaland province）. Alternative host plants for P. truncatus similar to those identified in Kenya, where the pest is already endemic, were found to occur throughout Zimbabwe which could support initial colonization and subsequent perpetuation of the pest in the country. In Zimbabwe, chances that P. truncatus may spread throughout the country, should it invade the country, are high because of unregulated grain trade and the fact that most of the potential invasion areas identified in this study, are located in the major maize producing areas. Measures to delay the occurrence of the pest in Zimbabwe should focus on the high-risk areas identified.展开更多
文摘Jatropha curcas is subject to the attacks of many insect pests, including Calidea panaethiopica Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, fruit and seeds of the shrub resulting in quantitative and qualitative losses;the shrub is also attacked by Aphthona whitfieldi Bryan (Coleoptera: Chrysomelidae) which feeds on the leaves causing complete defoliation in severe attack. Despite their economic importance, very little is known about the alternative host plants of these insect pests. The study of the ecology of these species is a pre-requisite for the development of appropriate control methods. The identification of alternative host plants of C. panaethiopica and A. whitfieldi was conducted from June 3rd 2013 to November 30th 2014 in the Sissili province, South Burkina Faso. During that period, four J. curcas’ plantations of six locations in the province were prospected for alternative host plants of the two insect pests. In each plantation, observations were done across a diagonal up to 500 m away from the plantation. Fallows in the vicinity of the J. curcas plantations were particularly examined. Potential host plants of the two insect pests were collected and bred in the laboratory in Léo where they were used to feed the insect pests. Only Jatropha gossypiifolia, a cousin of J. curcas, was found to be a common alternative host plant of both insect pests.
文摘<i>Jatropha curcas</i> is subject to the attacks of many insect pests, including <i>Calidea panaethiopica</i> Kirkaldy 1909 (Hemiptera: Scutelleridae) whose larvae and adults feed on flowers, fruit and seeds of the shrub resulting in quantitative and qualitative losses;the shrub is also attacked by <i>Aphthona whitfieldi</i> Bryan (Coleoptera: Chrysomelidae) which feeds on the leaves causing complete defoliation in severe attack. Despite their economic importance, very little is known about the alternative host plants of these insect pests. The study of the ecology of these species is a pre-requisite for the development of appropriate control methods. The identification of alternative host plants of <i>C. panaethiopica</i> and <i>A. whitfieldi</i> was conducted from June 3rd 2013 to November 30th 2014 in the Sissili province, South Burkina Faso. During that period, four <i>J. curcas</i>’ plantations of six locations in the province were prospected for alternative host plants of the two insect pests. In each plantation, observations were done across a diagonal up to 500 m away from the plantation. Fallows in the vicinity of the <i>J. curcas</i> plantations were particularly examined. Potential host plants of the two insect pests were collected and bred in the laboratory in Léo where they were used to feed the insect pests. Only <i>Jatropha gossypiifolia</i>, a cousin of <i>J. curcas</i>, was found to be a common alternative host plant of both insect pests.
文摘Prostephanus truncatus （Horn） is a notorious stored grain insect pest established in Tanzania in late 1970s and currently threatening the maize industry of Zimbabwe. The devastating effects of the pest attack, demands adequate preparation including identification of the potential invasion areas for more focused planning towards its effective management. In the current study, the potential P. truncatus invasion areas in Zimbabwe were identified based on climatic data with reference to the Tanzania situation using the geographical information system （GIS） Almanac Characterization Tool （AWhere-ACT 3.5 software）. Areas identified to be at greatest risk of invasion includes the northern part of the country, the southern-east region and a few areas in the east （Manicaland province）. Alternative host plants for P. truncatus similar to those identified in Kenya, where the pest is already endemic, were found to occur throughout Zimbabwe which could support initial colonization and subsequent perpetuation of the pest in the country. In Zimbabwe, chances that P. truncatus may spread throughout the country, should it invade the country, are high because of unregulated grain trade and the fact that most of the potential invasion areas identified in this study, are located in the major maize producing areas. Measures to delay the occurrence of the pest in Zimbabwe should focus on the high-risk areas identified.
