Damage Thresholds for Cabbage Root Fly [Delia radicum (L.)] in Cauliflower Assessed from Pot Experiments

IF 1.7 4区 农林科学 Q2 AGRONOMY Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-03-01 DOI:10.1080/09064719950135713
J. Bligaard
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引用次数: 9

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.
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白菜根蝇(Delia radicum (L.))在花椰菜中的危害阈值
1992年和1993年通过3个试验研究了白菜根蝇对菜花干物质产量的影响。在室外盆栽种植的花椰菜幼苗移栽后1、2、3、4周分别接种不同数量的白菜根蝇卵。采用一种非破坏性的方法估算了生长季节的干物质产量。植物干物质与卵数的回归分析表明,在种植后的前3-4周内,需要对白菜根蝇幼虫采取控制措施来保护幼苗,而在移栽后4周接种植株时,需要100个或更多的卵才能使平均植株干物质减少5%。卵和幼虫的平均死亡率在47%至61%之间变化,并且在实验和接种时间的四种组合中有两种幼虫的死亡率与密度有关。
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来源期刊
CiteScore
4.40
自引率
0.00%
发文量
56
审稿时长
2.3 months
期刊介绍: Acta Agriculturæ Scandinavica Section B publishes original research in applied soil and plant science with special attention given to to crop production in agri- and horticultural systems. We welcome manuscripts dealing with: Climate smart and sustainable crop production systems Water and nutrient efficiency Soil conservation and productivity Precise agriculture systems Applications of bio- and nanotechnology Digitalisation and robotics Soil-plant interactions Acta Agriculturæ Scandinavica, Section B – Soil & Plant Science forms part of a series of titles published on behalf of the Nordic Association of Agricultural Science (NJF). The series also includes Section A - Animal Science .
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