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Damage Thresholds for Cabbage Root Fly [Delia radicum (L.)] in Cauliflower Assessed from Pot Experiments 白菜根蝇(Delia radicum (L.))在花椰菜中的危害阈值
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI: 10.1080/09064719950135713
J. Bligaard
{"title":"Damage Thresholds for Cabbage Root Fly [Delia radicum (L.)] in Cauliflower Assessed from Pot Experiments","authors":"J. Bligaard","doi":"10.1080/09064719950135713","DOIUrl":"https://doi.org/10.1080/09064719950135713","url":null,"abstract":"The influence of cabbage root fly [Delia radicum (L.)] on cauliflower dry matter production was investigated in three experiments during 1992 and 1993. Cauliflower plants grown outdoors in pots were inoculated with different numbers of cabbage root fly eggs, 1, 2, 3 or 4 weeks after transplanting as seedlings. A non-destructive method was used to estimate dry matter production during the growing season. Regression analyses of plant dry matter against egg number demonstrated that control measures against cabbage root fly larvae are needed to protect young seedlings during the first 3-4 weeks after planting, whereas 100 eggs or more were required to cause a 5% reduction in mean plant dry matter when plants were inoculated 4 weeks after transplanting. Egg and larval mortality varied with means in the range from 47 to 61% and density-dependent larval mortality was demonstrated in two out of four combinations of experiment and inoculation time.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"21 4","pages":"57-64"},"PeriodicalIF":1.6,"publicationDate":"1999-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72618680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Sensory quality of carrots: Effect of harvest and storage time 胡萝卜感官品质:收获与贮藏时间的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362510
T. Suojala, T. Tupasela
{"title":"Sensory quality of carrots: Effect of harvest and storage time","authors":"T. Suojala, T. Tupasela","doi":"10.1080/09064719909362510","DOIUrl":"https://doi.org/10.1080/09064719909362510","url":null,"abstract":"This study aimed to determine how harvest and storage time influence the variation in the sensory attributes of carrots. Carrots harvested at different dates in September and October at an experimental site and on farms were analysed before and after storage. In general, delaying the harvest increased the sensory scores for juiciness, crispness, sweetness and overall flavour and decreased scores for bitterness, but the effects were not found in carrots from all locations. Frosts that injured carrots and resulted in a decline in sugar content in 1996 did not influence sensory quality. Storage had little effect on sensory quality, but juiciness and crispness frequently received lower gradings after storage. It is concluded that avoiding too early a harvest ensures the best sensory quality of carrots.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"285 1","pages":"143-151"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74393279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Seed yield and Sulphur partitioning in two inbred lines of low and high glucosinolate oilseed rape (Brassica napus l.) and their hybrids at three levels of sulphur supply 低硫代葡萄糖苷和高硫代葡萄糖苷油菜籽2个自交系及其杂交种在3个硫供水平下的种子产量和硫分配
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362514
J. Davik, A. Bakken
{"title":"Seed yield and Sulphur partitioning in two inbred lines of low and high glucosinolate oilseed rape (Brassica napus l.) and their hybrids at three levels of sulphur supply","authors":"J. Davik, A. Bakken","doi":"10.1080/09064719909362514","DOIUrl":"https://doi.org/10.1080/09064719909362514","url":null,"abstract":"","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"51 1","pages":"184-188"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88186679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Volatiles from different barley cultivars affect aphid acceptance of neighbouring plants 不同大麦品种的挥发物影响蚜虫对邻近植物的接受程度
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362511
J. Pettersson, V. Ninkovic, E. Ahmed
{"title":"Volatiles from different barley cultivars affect aphid acceptance of neighbouring plants","authors":"J. Pettersson, V. Ninkovic, E. Ahmed","doi":"10.1080/09064719909362511","DOIUrl":"https://doi.org/10.1080/09064719909362511","url":null,"abstract":"Effects of volatiles from one plant on the aphid acceptance of a neighbouring plant were studied in laboratory experiments with four barley cultivars. With a compressor‐supported system, air was led over one plant and then over a test plant. After treatment, settling of apterae of Rhopalosiphum padi (L.) on the responding test plants was compared with that on control plants treated with air from no other plant or air from a plant of the same cultivar. In an untreated state the four barley cultivars did not show differences with regard to aphid acceptance. However, after exposure to air from another plant significant changes in aphid acceptance were found in seven of the 16 possible cultivar combinations of inducing and responding plants. Significant changes in leaf temperature were recorded in 11 combinations, indicating that the aphid response is part of a broader effect of plant‐plant communication. Two of the four cultivars showed significant intracultivar communication. The congruence between changes ...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"25 1","pages":"152-157"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86378796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 75
Screening of field performance of entomopathogenic fungi and nematodes against cabbage root flies (Delia radicum l. and d. floralis (fall.); Diptera, Anthomyiidae) 昆虫病原真菌和线虫对白菜根蝇(Delia radicum l.和d. floralis (fall.))田间性能的筛选双翅目,Anthomyiidae)
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362513
I. Vänninen, H. Hokkanen, J. Tyni-Juslin
{"title":"Screening of field performance of entomopathogenic fungi and nematodes against cabbage root flies (Delia radicum l. and d. floralis (fall.); Diptera, Anthomyiidae)","authors":"I. Vänninen, H. Hokkanen, J. Tyni-Juslin","doi":"10.1080/09064719909362513","DOIUrl":"https://doi.org/10.1080/09064719909362513","url":null,"abstract":"Finnish isolates of Beauveria bassiana (8 isolates), Metarhizium anisopliae (7), Tolypocladium sp. (2), Paecilomyces farinosus (2), P. fumosoroseus (1), Steinernema feltiae (3) and Bacillus thuringiensis ('Muscabac') were tested for efficacy against mixed populations of Delia radicum and D. floralis under field conditions in 1986–90. All pathogens were applied preventatively, the fungi as aqueous conidial or mycelial suspensions, dry conidia or dry mycelial powder. In only two of the nine experiments did B. bassiana or M. anisopliae give some control. In 1986, B. bassiana SF85–2 and Tolypocladium sp. SF85–4 (both at rate 1.2 x 109 conidia plant‐ 1), and ‘Muscabac’ (25 g 1−1, 1 dl plant−1) reduced the number of pupae by 80%, 60% and 50%, respectively, as compared with untreated and chemical (isophenphos) controls. In 1990, M. anisopliae SF86–39 at rate 1.6 x 109conidia plant−1 and 1.5 x 108 CFU plant−1 and S. feltiae SFS‐22 (35000 plant−1), increased the yield of cauliflower 2.2, 1.8, and 2.3‐fold, respect...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"97 1","pages":"167-183"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83648311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 35
DOES THE DENSITY OF OVIPAROUS FEMALES REGULATE MATING SUCCESS IN BIRD CHERRY-OAT APHID RHOPALOSIPHUM PADI (L.)? 卵生雌虫的密度是否能调节鸟樱蚜的交配成功率?
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719950135650
R. Glinwood, J. Pettersson
{"title":"DOES THE DENSITY OF OVIPAROUS FEMALES REGULATE MATING SUCCESS IN BIRD CHERRY-OAT APHID RHOPALOSIPHUM PADI (L.)?","authors":"R. Glinwood, J. Pettersson","doi":"10.1080/09064719950135650","DOIUrl":"https://doi.org/10.1080/09064719950135650","url":null,"abstract":"","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"8 1","pages":"125-128"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78795951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Monitoring and control of the carrot fly (Psila rosae fabr.) in northern Norway 挪威北部胡萝卜蝇(Psila rosae fabr.)监测与防治
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362512
T. J. Johansen
{"title":"Monitoring and control of the carrot fly (Psila rosae fabr.) in northern Norway","authors":"T. J. Johansen","doi":"10.1080/09064719909362512","DOIUrl":"https://doi.org/10.1080/09064719909362512","url":null,"abstract":"A 4‐year study (1991–94) focused on (1) the use of yellow sticky traps to monitor carrot fly activity, (2) insecticide control trials, and (3) analyses for insecticide residues in carrots in northern Norway. There was only one generation of flies each year. In most fields, first flies appeared in the second part of June, with a peak fly activity occurring in the first part of July. The maximum difference in peak activity from one year to the next was 3 weeks. In five trials in which the fly infestation was high, 10–100% of the roots were damaged and marketable yield was reduced by 30–100%. Satisfactory control was achieved by drenching the crop with the organophosphorous insecticides diazinon or fenthion, timed according to catch on traps. Seed coating (isofenphos) had an unreliable, often lacking, effect. Residue levels of the fenthion in the carrots at harvest were unacceptable, even when this insecticide was applied at the recommended rates.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"46 1","pages":"158-166"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84630665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Weed development in cereals under different growth conditions and control intensities 不同生长条件和控制强度对谷物杂草发育的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719909362509
H. Fykse, K. Wærnhus
{"title":"Weed development in cereals under different growth conditions and control intensities","authors":"H. Fykse, K. Wærnhus","doi":"10.1080/09064719909362509","DOIUrl":"https://doi.org/10.1080/09064719909362509","url":null,"abstract":"The development of weed communities in cereals was investigated over 5 years at four locations in Norway. Each year the same plots were treated with 0, 1/3, 2/3 or 3/3 of the ‘normal’ dose of either of two herbicides. The weed species that emerged varied between years and locations, but were unaffected by treatments. The total number of weed plants and the frequency of individual species varied in all fields, but the changes differed greatly between fields, dosages and years. The seed bank was increased by the lowest herbicide dose and unaffected by the higher doses. The percentage of emerged weeds decreased with time, but varied between the fields. The per cent emergence was lower on untreated than on treated plots. The weed abundance in previous years and the size of the seed bank affected the plant number, but the air temperature after sowing was just as important. Even soil temperature in spring prior to tillage influenced weed emergence.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"47 1","pages":"134-142"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81009696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
ROLE OF ETHYLENE ON SPROUTING OF ONION BULBS (ALLIUM CEPA L.) 乙烯对洋葱鳞茎发芽的影响
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-01-01 DOI: 10.1080/09064719950135641
N. Benkeblia, G. Selselet-Attou
{"title":"ROLE OF ETHYLENE ON SPROUTING OF ONION BULBS (ALLIUM CEPA L.)","authors":"N. Benkeblia, G. Selselet-Attou","doi":"10.1080/09064719950135641","DOIUrl":"https://doi.org/10.1080/09064719950135641","url":null,"abstract":"Ethylene is a volatile hormone that has received considerable interest as a regulator of plant growth and is involved in numerous aspects of plant life. It has long been recognized as a crucial factor in the storage of horticultural products, and was employed in various cultural and postharvest practices long before it was identified as the causative agent (Abeles et al., 1992). It has been shown that sprouting of onion bulbs is controlled by some hormones which inhibit (abscissic acid) or promote (cytokinins) growth, and ethylene may also inhibit or promote bud growth by regulating these factors. However, its role in breaking dormancy and promoting sprouting of onion bulbs remains unclear (Woltering & Sterling, 1986; Abeles et al., 1992). Exogenous ethylene (ethephon) has been used to overcome the dormancy of both Gladiolus (Halevy et al., 1970) and Liatris (Keren-Paz et al., 1989) corms. In addition to promoting sprouting of gladiolus, ethephon increases the effectiveness of fungicides, apparently by increasing their penetration into corm tissues (Simchon et al., 1972). In this investigation, we have studied the role of ethylene (ethephon) and silver thiosulfate (STS), a patent inhibitor of ethylene action, on the sprouting of onion bulbs during storage.","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"15 1","pages":"122-124"},"PeriodicalIF":1.6,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81851040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Diversity in Nordic spring wheat cultivars (1901–93) 北欧春小麦品种的多样性(1901 - 1993)
IF 1.6 4区 农林科学
Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1998-12-01 DOI: 10.1080/09064719809362503
R. Ortiz, S. Madsen, S. Andersen
{"title":"Diversity in Nordic spring wheat cultivars (1901–93)","authors":"R. Ortiz, S. Madsen, S. Andersen","doi":"10.1080/09064719809362503","DOIUrl":"https://doi.org/10.1080/09064719809362503","url":null,"abstract":"Nordic plant breeders have selected superior genotypes and released new spring wheat cultivars throughout this century. However, the extent of phenotypic diversity that exists in this improved germplasm has not been accurately investigated. This study phenotypically assessed 75 selected cultivars released to farmers in Denmark, Finland, Norway and Sweden within the last 10 decades. Grouping of cultivars was not related to their geographical origin or decade of release. The respective within‐cluster variances were always larger than the among‐cluster variances. The average phenotypic diversity for Nordic spring wheat germplasm was 0.22, which was not surprising because some newer cultivars were derived from older cultivars. There was a significant influence of geographical origin on days to heading, straw, grain and biomass weight, and kernel number. Likewise, the country × decade of release interaction was significant for all characteristics except plant height. These findings suggest that irrespective of...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":"53 1","pages":"229-238"},"PeriodicalIF":1.6,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91391026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
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