DIVERSITY AND ABUNDANCE OF LANDING APHIDS IN TWO AREAS OF SEED POTATO PRODUCTION IN TUNISIA; RELATIVE TO THE INCIDENCE OF POTATO VIRUSES

IF 0.8 4区 生物学 Q3 ZOOLOGY Redia-Giornale Di Zoologia Pub Date : 2020-11-12 DOI:10.19263/redia-103.20.13
Amen Hlaoui, E. Mazzoni, R. Souissi, Sonia Boukhris Bouhachem
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Abstract

Aphid flight activities were monitored in 2015 in two areas of seed potato production in Tunisia. Yellow water traps were used to investigate the diversity of aphidofauna and the incidence of aphids involved in potato virus transmission. A total of 9966 specimens belonged to 73 taxa were captured. The cumulative abundance recorded in Douala (first site) was much higher than in El Ogla (second site) (8768 vs 1189 specimens). The most preponderant species in Douala were Aphis spiraecola Patch (66.1%) and Aphis spp. group (13.5%). In El Ogla Rhopalosiphum padi (L.) comprised 58.9% of total catches, followed by Acyrthosiphon pisum (Harris) (12%) and Aploneura lentisci (Passerini) (10.4%). The highest values of diversity indices were recorded on April 23 th [Shannon-Wiener index (H’)=2.58; Simpson index (1-D)=0.88] in Douala and on May 12th (H’=1.70; 1-D=0.75) in El Ogla. The detection of viral infections by DAS-ELISA determined the predominance of Potato virus Y amongst five main potato viruses tested. Overall Chi-square analysis determined significant differences crossing all areas of seed and ware potatoes and season crops. The highest incidence of viruses was recorded in Douala (18.5%) while El Ogla was under the threshold value (4%). This might be attributed to the occurrence of aphids in early season known previously to be efficient vectors of PVY and to the characteristics of area including climatic conditions, altitude and landscape structure. These results provide new evidence for El Ogla as ideal site to produce healthy tubers while conversely Douala is favourable for the propagation of vectors and viruses.
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突尼斯两个种薯产区蚜虫的多样性和丰度相对于马铃薯病毒的发病率
2015年对突尼斯两个种薯产区的蚜虫飞行活动进行了监测。采用黄水诱虫器调查了马铃薯病毒传播中蚜类的多样性和蚜类的发生情况。共捕获标本9966件,隶属73个分类群。Douala(第一个地点)的累积丰度远高于El Ogla(第二个地点)(8768对1189)。杜阿拉最优势种为螺旋体蚜虫斑块(66.1%)和蚜虫种群(13.5%)。在El Ogla, Rhopalosiphum padi (L.)占总渔获量的58.9%,其次是Acyrthosiphon pisum (Harris)(12%)和Aploneura lentisci (Passerini)(10.4%)。多样性指数最高值出现在4月23日[Shannon-Wiener指数(H ')=2.58;杜阿拉和5月12日的Simpson指数(1-D)=0.88, H ' =1.70;1-D=0.75)。采用DAS-ELISA法检测病毒感染情况,发现马铃薯Y病毒在5种主要马铃薯病毒中占优势。总体卡方分析确定了所有地区的种子、马铃薯和季节作物的显著差异。杜阿拉的病毒发病率最高(18.5%),而埃尔奥格拉低于阈值(4%)。这可能与蚜虫早季发生是PVY的有效媒介有关,也与气候条件、海拔高度和景观结构等地区特征有关。这些结果为El Ogla是生产健康块茎的理想地点提供了新的证据,而相反,Douala有利于载体和病毒的繁殖。
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来源期刊
CiteScore
1.20
自引率
20.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: Redia supports its long history of basic and applied research in entomology and invertebrate zoology in the field of crop and forest tree protection responding at the same time to the increasing need of innovation and technological improvement.
期刊最新文献
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