1- Tarbiat Modares University
2- Tarbiat Modares University , moharami@modares.ac.ir
2- Tarbiat Modares University , moharami@modares.ac.ir
Abstract: (172 Views)
The tomato leaf miner, Tuta absoluta (Meyrick, 1917), is a devastating invasive pest that has seriously threatened tomato crops. This pest has spread rapidly across several continents, and its global distribution demonstrates its ability to adapt to climate variability. In this context, the pupa is the most resistant stage when exposed to long-term cold temperatures. Therefore, indicators of cold resistance were studied in field-collected overwintering pupae and pupae reared under two constant conditions, high temperature and long day (25 °C, 16:8 L:D), and low temperature and short day (15 °C, 13:11 L:D). The results show that supercooling 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. Our findings could be helpful for predicting pest populations at the beginning of the growing season and for their management strategies
Article Type: Original Research |
Subject:
Agricultural Economics/Agriculture Marketing and Supply Chains
Received: 2019/09/17 | Accepted: 2024/01/2 | Published: 2024/03/31
Received: 2019/09/17 | Accepted: 2024/01/2 | Published: 2024/03/31
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