scholarly journals Phytophagous insect oviposition shifts in response to probability of flower abortion owing to the presence of basal fruits

2017 ◽  
Vol 7 (21) ◽  
pp. 8770-8779
Author(s):  
Shivani Jadeja ◽  
Brigitte Tenhumberg
Keyword(s):  
Phytophagous Insect ◽  
Flower Abortion ◽  
Insect Oviposition

scholarly journals Grafting Improves Fruit Yield of Cucumber Plants Grown under Combined Heat and Soil Salinity Stresses

Horticulturae ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 61
Author(s):  
Yousry Bayoumi ◽  
Emad Abd-Alkarim ◽  
Hassan El-Ramady ◽  
Farouk El-Aidy ◽  
El-Samahy Hamed ◽  
...  
Keyword(s):  
Arid Regions ◽  
Saline Soil ◽  
Growth Yield ◽  
High Temperature Stress ◽  
Cucumis Sativus L ◽  
Chlorophyll Contents ◽  
Flower Abortion ◽  
Yield Quality ◽  
Si Content ◽  
Better Than

Improving the productivity of cucumber (Cucumis sativus L.) plants subjected to combined salinity and heat stresses is a significant challenge, particularly in arid and semi-arid regions. Gianco F1 cucumbers were grafted onto five cucurbit rootstocks and, together with an ungrafted control, were grown in Egypt in a net house with saline soil during the summer season over two years. The vegetative growth, yield, quality, biochemical, and mineral composition traits were measured. Although many differences were observed among treatments, in general, the grafted plants had a performance better than or similar to that of the ungrafted plants, based on the different parameters measured. In particular, the cucumber plants grafted onto the Cucurbita maxima × C. moschata interspecific hybrid rootstocks VSS-61 F1 and Ferro had the highest early and total marketable yields. These two rootstocks consistently conferred higher vigor to the scion, which had lower flower abortion rates and higher chlorophyll contents. The fruit quality and N, P, and K composition in the leaves suffered few relevant changes as compared with the control. However, the leaves of the VSS-61 F1 had higher catalase activity, as well as proline and Se contents, while those of Ferro had higher Si content. This study reveals that the grafting of cucumber plants onto suitable rootstocks may mitigate the adverse effects caused by the combination of saline soil and heat stresses. This represents a significant improvement for cucumber cultivation in saline soil under high-temperature stress conditions in arid regions.

Energy budget of a phytophagous insect, an acridian criotettix grandis hanc.

2014 ◽  
Vol 37 (1) ◽  
pp. 49-56
Author(s):  
D.P. Semwal ◽  
Shamila Kalia
Keyword(s):  
Energy Budget ◽  
Energy Flow ◽  
Quantitative Estimation ◽  
Tissue Growth ◽  
Food Utilization ◽  
Phytophagous Insect

The studies on energetics are concerned mainly with evaluating the energy flow and, therefore, are related to the incorporation of energy into new protoplasm in addition to estimates of maintenance of energy. The work with Criotettix grandis Hanc. has still not been worked upon therefore Quantitative estimation of consumption, assimilation, tissue growth and food utilization efficiencies of the phytophagous insect was calculated and worked out.

Diversity and composition of phytophagous insect guilds on Brassicaceae

Oecologia ◽  
1998 ◽  
Vol 113 (3) ◽  
pp. 391-399 ◽  
Author(s):  
M. Frenzel ◽  
R. Brandl
Keyword(s):  
Phytophagous Insect ◽  
Insect Guilds

scholarly journals Response of Oxypetalum caeruleum to Irradiance, Temperature, and Photoperiod

1990 ◽  
Vol 115 (6) ◽  
pp. 910-914 ◽  
Author(s):  
A.M. Armitage ◽  
N.G. Seager ◽  
I.J. Warrington ◽  
D.H. Greer ◽  
J. Reyngoud
Keyword(s):  
Stem Elongation ◽  
Net Photosynthesis ◽  
Stem Length ◽  
Photon Flux ◽  
Vase Life ◽  
Photosynthetic Photon Flux ◽  
Node Number ◽  
Stem Strength ◽  
Flower Abortion ◽  
Reduced Time

Incremental increases in temperature from 14 to 22 to 30C resulted in linear increases in stem length and node number and decreases in stem diameter and stem strength of Oxypetalum caeruleum (D. Don.) Decne. Higher temperatures also resulted in additional flower abortion, reduced time to flowering, and fewer flowering stems per inflorescence. Reduction in the photosynthetic photon flux (PPF) from 695 to 315 μmol·s-1·m-2 had similar effects as increasing the temperature on vegetative characteristics, but had little effect on reproductive ones. The rate of stem elongation was greatest at low PPF for all temperatures and at high temperature for all PPF treatments. Net photosynthesis rose between 14 and 22C and declined at 30C for all PPF treatments. Long photoperiods (12 or 14 hours) resulted in longer internodes, longer stems, and more flowers per cyme than short photoperiods (8 or 10 hours), but photoperiod had little effect on flowering time. Treatments to reduce latex coagulant and silver thiosulfate treatments had no significant effect on vase life.

scholarly journals Primeira Reportagem da Mosca Minadora em Cebola no Alto Paranaíba

2014 ◽  
Vol 7 (3) ◽  
pp. 235-237 ◽  
Author(s):  
Flávia Alves ◽  
Flávio Fernandes ◽  
Paulo Silva ◽  
Jéssica Gorri ◽  
Luan Ribeiro
Keyword(s):  
Survival Rate ◽  
Allium Cepa ◽  
Negative Relationship ◽  
Phytophagous Insect ◽  
Study Report ◽  
Allium Cepa L ◽  
Leaf Drop ◽  
First Occurrence ◽  
Em 12

Liriomyza spp. é considera praga em várias culturas no Brasil. As larvas confeccionam minas nas folhas, reduzem a área fotossintética, causam murcha e queda precoce de folhas. Objetivou-se neste trabalho reportar o primeiro ataque de Liriomyza spp., seu dano e a sobrevivência em cebola (Allium cepa L.) no Alto Paranaíba-MG. A sua ocorrência e o prejuízo foram detectados em cinco avaliações em 12 lavouras de cebola (50 plantas/ha). Já a sobrevivência foi determinada em condições de temperatura controlada. Observou-se a presença de Liriomyza spp. causando minas serpenteadas, com relação direta e negativa do número de minas com a produtividade, com prejuízo de 120 kg ha-1 e com taxa de sobrevivência de larva-pupa (57,89%) e pupa-adulto (63,63%). Este fitófago pode se tornar praga séria nesta cultura. First Occurrence of Leafminer Causing Damage in Onion at Alto Paranaíba Abstract. Liriomyza spp. is considered pests in various crops in Brazil. The larvae mine the leaves cook up, reduce the photosynthetic area, cause wilting and premature leaf drop. The objective of this study report the first attack of Liriomyza spp., its damage and survival in onion (Allium cepa L.) in Alto Parnaíba-MG. Their occurrence and injury ratings were detected in five of onion crops in 12 (50 plants/ha). Since survival was determined under conditions of controlled temperature. We observed the presence of Liriomyza spp. causing serpentine mines, with direct and negative relationship with the number of mines productivity, a loss of 120 kg ha-1 and survival rate of larva-pupa (57.89%) and pupa-adult (63.63%). Thus, this phytophagous insect can become a serious pest in this crop.

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