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Agronomy 2014, 4(1), 167-177; doi:10.3390/agronomy4010167

The Effect of Mean Daily Temperature and Relative Humidity on Pollen, Fruit Set and Yield of Tomato Grown in Commercial Protected Cultivation

1
Negev R & D Center M.P.O Negev 4, Negev 8544100, Israel
2
Vegetable Department, Extension Services-Ministry of Agriculture, Bet-Dagan 5020000, Israel
3
NaanDanJain Irrigation Company, Naan 7682900, Israel
*
Author to whom correspondence should be addressed.
Received: 29 December 2013 / Revised: 11 March 2014 / Accepted: 12 March 2014 / Published: 21 March 2014
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Abstract

The research trial was carried out in the Mediterranean region where high summer temperatures have been proved to have a detrimental effect on the delicate tomato fruitset process. The flower to fruit set process was simultaneously monitored in fogged and unfogged shelters during the three-month Mediterranean summer season. Comparisons of pollen quality, fruit set rates and fruit yield revealed that mean daily temperatures of 25–26 °C are the upper limit for proper fruit set and fruit yield for tomatoes grown in protected cultivation during the hot Mediterranean summer period. A moderate reduction of 1–1.5 °C in mean daily temperatures together with the increased RH (relative humidity) from 50% to 70% during day time improved the pollen grain’s viability. Suggestions concerning more efficient controls on the fogging system considering those findings are discussed.
Keywords: mean daily temperatures; fruit set; pollen; tomato; heat stress; net house mean daily temperatures; fruit set; pollen; tomato; heat stress; net house
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Harel, D.; Fadida, H.; Slepoy, A.; Gantz, S.; Shilo, K. The Effect of Mean Daily Temperature and Relative Humidity on Pollen, Fruit Set and Yield of Tomato Grown in Commercial Protected Cultivation. Agronomy 2014, 4, 167-177.

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