Volume 26, Issue 4 (2024)                   JAST 2024, 26(4): 909-917 | Back to browse issues page

‎ 10.22034/JAST.26.4.909

XML Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Dehghani S, Mikani A, Mehrabadi M, Moharramipour S. Impact of Cold Exposure on the Mortality of Tuta absoluta Pupae. JAST 2024; 26 (4) :909-917
URL: http://jast.modares.ac.ir/article-23-36527-en.html
Impact of Cold Exposure on the Mortality of Tuta absoluta Pupae
S. Dehghani1 , A. Mikani1 , M. Mehrabadi1 , S. Moharramipour * 2
1- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Islamic Republic of Iran.
2- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Islamic Republic of Iran. , moharami@modares.ac.ir
Abstract:   (621 Views)
The tomato leafminer, Tuta absoluta is a devastating invasive pest that poses a serious threat to tomato crops worldwide. Its extensive global dispersion serves its capacity to adapt to variations in climate conditions. In this context, the pupa is the most resistant stage to prolonged exposure to cold temperatures. Therefore, indicators of cold resistance were studied in overwintering pupae collected from the field and pupae reared under two constant conditions, high temperature, and long day (25°C, 16:8 L:D and 65±5% RH), and low temperature and short day (15°C, 13:11 L:D and 65±5% RH). The results show that the super cooling point (SCP) significantly decreased in December (-20.5±1.2°C) and January (-20.26±0.78°C) with a decrease in temperature. In the laboratory, the decrease in temperature and photoperiod increased the tolerance of pupae to subzero temperatures. Lethal Temperature 50 (LT50) and LT90 of pupae collected in the field were recorded at -13.70 to -10.23°C and -18.73 to -15.37°C, respectively. A comparison of lethal temperatures with the lowest ambient temperature in December and January indicated that T. absoluta has a high overwintering potential in Karaj, Alborz Province, Iran, and can easily survive cold winters.
 
Keywords: Cold hardiness, Lethal temperature, Supercooling point, Tomato leafminer.
Full-Text [PDF 4966 kb]   (568 Downloads)    
Article Type: Original Research | Subject: Agricultural Economics/Agriculture Marketing and Supply Chains
Received: 2019/09/17 | Accepted: 2024/01/2 | Published: 2024/03/31
Add your comments about this article : Your username or Email:
CAPTCHA
Send email to the article author

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.