{"title":"稻蚜种群密度相关的建立与繁殖","authors":"Shigeru Hoshino, Katsumi Togashi","doi":"10.1007/s13355-022-00806-5","DOIUrl":null,"url":null,"abstract":"<div><p><i>Aphelenchoides besseyi</i> Christie (Nematoda: Aphelenchoididae) is a seed-borne ectoparasite of <i>Oryza sativa</i> rice and causes ‘white tip’ disease. When seeds are soaked in water, the nematodes emerge from them, arrive at rice plants by swimming in flooded paddy fields, and reproduce on them. Two separate experiments were conducted to determine the relationships of the nematode abundance in water to the arrival (infection) and subsequent multiplication of nematodes, the disease incidence, and the yield of rice grains. Experiment 1 showed that, as the <i>A. besseyi</i> population (Pi) surrounding the seedlings increased, both the disease incidence of plants and the number of nematodes (Pf) in all seeds harvested per plant increased, but the rate of increase in the nematode population (Pf/Pi) decreased. Negative relationships were found between the Pi level and the estimated probability of nematode arrival, although it was extremely difficult to isolate all arrivals from plants (experiments 2 − 5). However, the number of arrivals was estimated to increase with the Pi level. It is considered from these results that the density-dependent decrease in the rate of increase (Pf/Pi) was determined largely by the density-dependent reduction in the rates of nematode establishment (colonization) and/or post-establishment reproduction on plants.</p></div>","PeriodicalId":8551,"journal":{"name":"Applied Entomology and Zoology","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Density-related establishment and reproduction of Aphelenchoides besseyi (Nematoda: Aphelenchoididae) populations on Oryza sativa\",\"authors\":\"Shigeru Hoshino, Katsumi Togashi\",\"doi\":\"10.1007/s13355-022-00806-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><i>Aphelenchoides besseyi</i> Christie (Nematoda: Aphelenchoididae) is a seed-borne ectoparasite of <i>Oryza sativa</i> rice and causes ‘white tip’ disease. When seeds are soaked in water, the nematodes emerge from them, arrive at rice plants by swimming in flooded paddy fields, and reproduce on them. Two separate experiments were conducted to determine the relationships of the nematode abundance in water to the arrival (infection) and subsequent multiplication of nematodes, the disease incidence, and the yield of rice grains. Experiment 1 showed that, as the <i>A. besseyi</i> population (Pi) surrounding the seedlings increased, both the disease incidence of plants and the number of nematodes (Pf) in all seeds harvested per plant increased, but the rate of increase in the nematode population (Pf/Pi) decreased. Negative relationships were found between the Pi level and the estimated probability of nematode arrival, although it was extremely difficult to isolate all arrivals from plants (experiments 2 − 5). However, the number of arrivals was estimated to increase with the Pi level. It is considered from these results that the density-dependent decrease in the rate of increase (Pf/Pi) was determined largely by the density-dependent reduction in the rates of nematode establishment (colonization) and/or post-establishment reproduction on plants.</p></div>\",\"PeriodicalId\":8551,\"journal\":{\"name\":\"Applied Entomology and Zoology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2022-11-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Entomology and Zoology\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13355-022-00806-5\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENTOMOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Entomology and Zoology","FirstCategoryId":"97","ListUrlMain":"https://link.springer.com/article/10.1007/s13355-022-00806-5","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
Density-related establishment and reproduction of Aphelenchoides besseyi (Nematoda: Aphelenchoididae) populations on Oryza sativa
Aphelenchoides besseyi Christie (Nematoda: Aphelenchoididae) is a seed-borne ectoparasite of Oryza sativa rice and causes ‘white tip’ disease. When seeds are soaked in water, the nematodes emerge from them, arrive at rice plants by swimming in flooded paddy fields, and reproduce on them. Two separate experiments were conducted to determine the relationships of the nematode abundance in water to the arrival (infection) and subsequent multiplication of nematodes, the disease incidence, and the yield of rice grains. Experiment 1 showed that, as the A. besseyi population (Pi) surrounding the seedlings increased, both the disease incidence of plants and the number of nematodes (Pf) in all seeds harvested per plant increased, but the rate of increase in the nematode population (Pf/Pi) decreased. Negative relationships were found between the Pi level and the estimated probability of nematode arrival, although it was extremely difficult to isolate all arrivals from plants (experiments 2 − 5). However, the number of arrivals was estimated to increase with the Pi level. It is considered from these results that the density-dependent decrease in the rate of increase (Pf/Pi) was determined largely by the density-dependent reduction in the rates of nematode establishment (colonization) and/or post-establishment reproduction on plants.
期刊介绍:
Applied Entomology and Zoology publishes articles concerned with applied entomology, applied zoology, agricultural chemicals and pest control in English. Contributions of a basic and fundamental nature may be accepted at the discretion of the Editor. Manuscripts of original research papers, technical notes and reviews are accepted for consideration. No manuscript that has been published elsewhere will be accepted for publication.