Daylength and Resistance of Strawberry Foliage to the Twospotted Spider Mite

Patterson, C. G.; Archbold, Douglas D.; Rodríguez, J. G.; Hamilton-Kemp, Thomas R.

doi:10.21273/hortsci.29.11.1329

Cited by 13 publications

(7 citation statements)

References 10 publications

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“…Although the influence of insect-and plant-intrinsic factors were more explored regarding expression of resistance, environmental factors received less attention. Daylength, light intensity, temperature, and relative humidity are known to affect expression of plant resistance traits to insect pests (Rogers and Mills, 1974;Johnson et al, 1980;Kennedy et al, 1981;Webster and Starks, 1987;Patterson et al, 1994;Ohm et al, 1997;Snyder et al, 1998;Sharma et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Common bean resistance expression to whitefly in winter and rainy seasons in Brazil

Silva

Boiça

Farias

et al. 2019

Sci. agric. (Piracicaba, Braz.)

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Whitefly Bemisia tabaci (Gennadius) biotype B is the major pest of common bean (Phaseolus vulgaris L.) in Brazil and other countries. Host plant resistance is one of the cornerstones of Integrated Pest Management (IPM), and assessment of cultivars for insect resistance is fundamental to provide farmers options for pest control. This study evaluated common bean resistance to whitefly in the winter and rainy seasons in Jaboticabal, Brazil, and correlated the infestation with climatic factors. The plant part and development period of common bean that are more susceptible to whitefly infestation were also examined for potential use in IPM. Field experiments were carried out using 18 and 19 commercial cultivars in the winter and rainy seasons, respectively. Whitefly eggs, nymphs, and adults in the upper part and lower part of plants were sampled from 25 to 60 days after emergence (DAE). Cultivars IAC-Una and IAC-Eldorado had less oviposition and the former also showed lower adult infestation in the winter season. In the rainy season, cultivars IAPAR-81 and Guará had a smaller number of eggs, whereas IAC-Centauro was less infested by nymphs. The number of nymphs and adults was similar among cultivars in the winter and rainy seasons, respectively. The upper part of plants had a greater number of eggs and adults, while, the lower part harbored larger numbers of nymphs. Common bean was more susceptible to whitefly at 25-32 DAE in both seasons. These results add useful information to IPM of whitefly in common bean.

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Section: Discussionmentioning

confidence: 99%

Common bean resistance expression to whitefly in winter and rainy seasons in Brazil

Silva

Boiça

Farias

et al. 2019

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

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“…Continuous light has been found to alter the relative amount of soluble carbohydrates in eggplant, to cause chlorosis and accumulation of soluble sugars and starch in leaves of cucumber, eggplant, tomato, and sweet pepper (Murage et al., 1996; Demers & Gosselin, 2002), and to reduce the content of pigments in leaves of tomato and sweet pepper (Demers & Gosselin, 2002). Continuous light has also been found to induce resistance against Tetranychus urticae Koch in strawberry, possibly by increased production of phenolic compounds (Patterson et al., 1994). However, the effect of continuous light on rose leaf chemistry or morphology is not known, and should be investigated to understand the response of the whitefly–rose interaction to continuous light.…”

Section: Discussionmentioning

confidence: 99%

Effect of continuous light on the biology of the greenhouse whitefly, Trialeurodes vaporariorum, on roses

Johansen¹

2009

Entomologia Exp Applicata

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Continuous light is a promising method to reduce the problems with rose powdery mildew in greenhouse rose production. The effects of such a light regime on the performance of insect pests on roses have so far not been investigated. In the present study, survival, developmental time, and reproduction during one generation of the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae), were characterized on roses, Rosa×hybrida cv. Passion, grown in climate chambers with long‐day conditions (L20:D4) or continuous light (L24:D0) at 21 °C and fluctuating relative humidity (mean 74%, range 47–96%). Whiteflies reared under continuous light had lower immature survival and fecundity and shorter female longevity than whiteflies reared under long‐day conditions, but immature developmental time was only slightly affected. Life‐table analysis showed that the net reproductive rate (Ro) and intrinsic rate of natural increase (rm) were reduced by 85 and 76%, respectively, and the time for the population to double its size (D) was 4.2 times longer under continuous light. This mean that the whitefly population growth under continuous light was strongly reduced compared with the traditional light regime used in rose production.

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“…The reduced T. urticae abundance in LED plots could be due to direct effects {e.g., blue light inducing diapause [20], or indirect effects mediated by the plant (e.g., higher light intensity improving plant defence [16]) or both}. None of these mechanisms was studied in the experiments, but the results on berry quality clearly demonstrate that LED treatments influenced plant physiology.…”

Section: Effects On Arthropod Faunamentioning

confidence: 99%

“…Supplemental light may also change seasonal patterns of plant susceptibility to herbivores. For example, strawberry foliage has been found to be more resistant to two-spotted spider mite (Tetranychus urticae) in summer than in spring, probably due to day-length governing the production of compounds involved in plant defence [8,16]. Supplemental light in the autumn could then extend the period of resistance.…”

Section: Introductionmentioning

confidence: 99%

Supplemental LED growth light in remontant strawberry at high latitudes

Nestby

Trandem

2013

Journal of Berry Research

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BACKGROUND: To grow remontant strawberries at high latitudes in autumn is challenging because of short days and low light levels. Nevertheless, current day and night temperatures in Norwegian coastal areas up to 63 degrees N are normally sufficient for growth and fruit development till early October, and even higher temperatures can be expected in the future according to climatic scenarios, with potential to prolong the growing season. However, light would be a minimum factor. It is therefore of interest to examine the effects of providing supplemental light when photosynthetic active radiation (PAR) falls below critical level for development of high fruit quality. OBJECTIVE: To examine effects on fruit yield parameters, fruit tension, Brix • and arthropod numbers, in order to investigate the potential of LED lighting using diodes giving red and blue light, as a means to prolong the growing season at northern latitudes. METHOD: In this two-year study remontant strawberry cvs 'Everest' and 'Rondo' were grown in high polytunnels. Two LED lighting levels (LED100 and LED300) were applied from 7 Pm to 7 AM, whenever light intensity fell below 400 mol m −2 s −1 from first week of September, and compared to ambient light (control). The LED300 was peaking at wavelengths of 460 nm and 660 nm, respectively blue and red, and the relation between blue and red light was 1 : 8; LED100 delivered similar wavelengths but the blue to red relation was 2 : 8. Fruit yield, soluble solids (Brix • ), fruit firmness, temperature ( • C), dew point ( • C), and PAR light (mol m −2 s −1 ) were recorded. The experimental design was block with four replications. The lamps were hung with the light source 40 cm above top of canopy, giving a PAR radiation at top of canopy of LED100 and LED300 of respectively 900 and 258 mol m −2 s −1 . RESULTS: LED improved fruit yield and quality, but more at 900 than at 258 mol m −2 s −1 . However, highest light level was probably beyond the saturation point for photosynthesis, at least in early morning and late evening and the last three weeks of the harvesting season, because of low temperatures. Some fruit yield was not harvested because of too low temperatures to achieve ripen fruits after mid-October. Arthropods were sampled from 'Rondo' leaves 2-3 times per season, and aphids, spider mites and predatory mites (introduced) were the most numerous groups. LED significantly decreased the number of spider mites in the autumn. CONCLUSIONS: LED lighting has potential as light source growing remontant strawberries in high polytunnels, when PAR radiation is below 400 mol m −2 s −1 . However, to benefit fully of the light it would be necessary to grow the plants in winter tunnels and add heating. That would increase the yields significantly compared with our results.

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Daylength and Resistance of Strawberry Foliage to the Twospotted Spider Mite

Cited by 13 publications

References 10 publications

Common bean resistance expression to whitefly in winter and rainy seasons in Brazil

Common bean resistance expression to whitefly in winter and rainy seasons in Brazil

Effect of continuous light on the biology of the greenhouse whitefly, Trialeurodes vaporariorum, on roses

Supplemental LED growth light in remontant strawberry at high latitudes

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