Plant characters of broccoli determinants of head production

Brandelero, Fernanda Daniela; Brum, Betânia; Storck, Lindolfo; Cardoso, Jessica; Kutz, Talita Slota; Vargas, Thiago de Oliveira

doi:10.1590/0103-8478cr20150750

Cited by 3 publications

(5 citation statements)

References 15 publications

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“…Additionally, broccoli mass decreased linearly with the amount of eggs deposited, when the first plants were ready for harvest. Our results therefore confirm that development delays and reduced plant growth during the growing season can lead to significant drops in head mass at harvest, at least when all plants are harvested in a row (Brandelero et al 2016). This result is interesting because plant mortality is currently regarded as the main damage caused by the cabbage root fly on broccoli (El Titi 1979;Estorgues 2005).…”

Section: Radicum Affects All Development and Growth Traits And Redsupporting

confidence: 77%

“…Plant mortality was also recorded. Plant growth was evaluated via two measurements: the product of the largest leaf length and width (thereafter called "relative leaf area"), known to be highly correlated with leaf area in Brassica crops (Olfati et al 2010;Cargnelutti Filho et al 2015;Tartaglia et al 2016) and the height above ground of the apical meristem (thereafter simply called "plant height" in the text), often used to give complementary information on plant growth (Kloen and Altieri 1990;Brandelero et al 2016).…”

Section: Plant Development and Growthmentioning

confidence: 99%

“…Gange and Brown (1989) suggested that due to root removal, below ground pests could have a similar effect as drought on plants. These indirect effects which can be assessed by monitoring plant growth and development above ground, may or may not lead to a significant decrease in final yield (Rosenheim et al 1997;Brandelero et al 2016).…”

mentioning

confidence: 99%

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Assessing the relationship between pest density and plant damage: a case study with the belowground herbivore Delia radicum (Diptera: Anthomyiidae) on broccoli

et al. 2019

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For many crops, we have poor knowledge about the relationship between pest density and damage. However, investigating pest harmfulness is particularly relevant currently in the search for alternative crop protection strategies that are unlikely to totally suppress pest populations. Here, we assessed the harmfulness of Delia radicum (L.) on broccoli (Brassica oleracea var. italica Plenck). We worked inside insect-proof cages set up in the field with additional pitfall traps to remove ground dwelling predators. Plants were manually infested with 10 levels of pest density ranging from 0 to 100 individuals per plant, following a natural infestation pattern. Surprisingly, no plants died but almost 100% of the pests introduced died over the course of the experiment. However, all broccoli development and growth traits were negatively correlated with pest density and broccoli head mass at harvest decreased linearly with pest density. The observation over time of development and growth traits showed evidence of plant compensation, suggesting that the head mass of individual plants may have reached similar values if allowed to fully mature. The relationship between pest density and damage, together with forecast models of pest population dynamics could be used to develop decision support tools assessing the relevance of preventative treatments. Keywords Crop losses; plant traits; plant injury; damage; plant compensation. Introduction Throughout the history of agriculture, the development of pest management strategies has led to dramatic decreases in crop losses to pests (Oerke 2006). However, the predominant crop protection method, that is pesticide usage, has various negative consequences, notably on human health and the beneficial fauna of agro-ecosystems (Desneux et al. 2007; Geiger et al. 2010). Alternatives are therefore urgently needed, but in contrast to pesticides, most of these alternatives (push-pull, insect netting, intercropping…) are likely to have partial efficiency. For example, conservation biological control, based on the enhancement of natural enemy populations, is thought to be an interesting method for reducing crop losses (Eilenberg et al. 2001) but is incompatible with the complete suppression of pest populations because by

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Section: Radicum Affects All Development and Growth Traits And Redsupporting

confidence: 77%

Section: Plant Development and Growthmentioning

confidence: 99%

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Assessing the relationship between pest density and plant damage: a case study with the belowground herbivore Delia radicum (Diptera: Anthomyiidae) on broccoli

et al. 2019

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“…For the author [28], the analysis and interpretation of canonical weights involve examining the signal and its magnitude, so that the variables with relatively larger canon weights contribute more to the statistical variables and vice versa. Brandelero et al [29] studying broccoli plant characters that determined head production, found a weight of 0.64 in the variable that most contributes to the correlation. In this study, the highest weight was 0.87 for Mn s in crop 1, followed by Mn t in crop 1 (0.58), Mn t in crop 2 in the first and second functions (0.51).…”

Section: Resultsmentioning

confidence: 99%

Canonical Correlation between Soil Attributes and Foliar of Conilon Coffee Trees

Fonseca¹,

Lima

Dardengo

et al. 2019

JEAI

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The nutritional status of the coffee tree is influenced by the concentration of nutrients in the soil of the growing area. The objective of this work was to evaluate, using canonical correlation, the linear relationships between chemical attributes of soil and nutrients of leaf tissues in seminal coffee. The work was developed in a commercial crop located in the municipality of Cachoeiro de Itapemirim, the southern region of the state of Espírito Santo. In the crop, an irregular sampling mesh was constructed, totalling 80 georeferenced points. The canonical correlation analysis was performed considering the original data observed in two consecutive conilon coffee harvests, 2015/16 and 2016/17, to verify the associations between a (dependent) group formed by foliar nutrients (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn) and an independent group formed by soil chemical attributes (pH, Ca, Al, K, S, P, Cu, Fe, Mn and Zn). Even if nutrients are available, that is, available in a satisfactory amount in the soil, it can happen that it does not reach the leaf tissue, resulting in a deficiency for some nutrients. There was a direct relationship between the concentration of K in the leaf tissue and K in the soil in the two harvests. Other soil attributes, such as Organic Matter, Fe, Mn, and S, also influenced this relationship, showing that the soil attributes in the independent group interact together on the nutrients in the leaf tissue. There is an inverse relationship between the concentrations of K in the leaf tissue and the Mn in the soil in the two harvests, showing that the excess of Mn in the soil is influencing the K deficiency in the leaf tissue.

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“…Сведения о корреляционных связях между признаками у капусты брокколи приведены в работах Харламова, Лихацкого и Чередниченко, Костенко, Renaud и др., Brandelero и др. [8,9,13,14,15]. При этом сведения об изменениях корреляционных связей при разных сроках посадки малочисленны.…”

Section: The Study Of the Correlation Relationship Between The Signsunclassified

Correlation Links Between Some Economically Valuable Signs in Broccoli

Zablotskaya¹,

Бондарева²,

Sirota³

2018

Ovoŝi Ross.

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н а у ч н о п р а к т и ч е с к и й ж у р н а л ов о щ и р о с с и и № 1 (3 9) 2 0 1 8 I S S N 2 0 7 2-9 1 4 6 (P r i n t) [ 8 ] СЕЛЕКЦИЯ И СЕМЕНОВОДСТВО СЕЛЬСКОХОЗЯЙСТВЕННЫХ РАСТЕНИЙ Введение Заблоцкая Е.А.*-аспирант лаб. селекции и семеноводства капустных культур Бондарева Л.Л.**-доктор с.-х. наук, зав. лаб. селекции и семеноводства капустных культур Сирота С.М.-доктор с.-х. наук, зам. директора ФГБНУ «Федеральный научный центр овощеводства» 143080, Россия, Московская обл., Одинцовский р-н, п. ВНИИССОК, ул. Селекционная, д.14

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Plant characters of broccoli determinants of head production

Abstract: The increasing consumption of single-head broccoli is due to several factors, among them there are food production in minimally processing form and the existence of hybrids that adapt to various climates, in addition to

Cited by 3 publications

References 15 publications

Assessing the relationship between pest density and plant damage: a case study with the belowground herbivore Delia radicum (Diptera: Anthomyiidae) on broccoli

Assessing the relationship between pest density and plant damage: a case study with the belowground herbivore Delia radicum (Diptera: Anthomyiidae) on broccoli

Canonical Correlation between Soil Attributes and Foliar of Conilon Coffee Trees

Correlation Links Between Some Economically Valuable Signs in Broccoli

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