scholarly journals Supercooling capacity and cold tolerance of the South American tomato pinworm, Tuta absoluta, a newly invaded pest in China

2020 ◽  
Author(s):  
Xiao-wei Li ◽  
Dong Li ◽  
Zhi-jun Zhang ◽  
Jun Huang ◽  
Jin-ming Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pupal Stage ◽  
Temperature Tolerance ◽  
Tuta Absoluta ◽  
Invasive Pest ◽  
South American ◽  
Tomato Production ◽  
Low Temperature Tolerance ◽  
South American Tomato Pinworm ◽  
Central Regions

AbstractTuta absoluta is a devastating invasive pest worldwide, causing severe damage to the global tomato industry. It has been recorded recently in the northwestern border areas of China, posing a significant threat to tomato production. It was presumed that the region's winter-related low temperatures would avert the alien species from successfully overwintering. In this study, the supercooling capacity and low-temperature tolerance of this pest were examined under laboratory conditions and its overwintering potential in Xinjiang was estimated. The results showed that the lowest supercooling point was recorded in the adult stage (− 19.47 °C), while the highest (− 18.11 °C) was recorded in the pupal stage. The supercooling points of pupae and adults were not influenced by gender. The Ltemp50 and Ltemp90 of female and male adults were the lowest when exposed to cold for 2 h. However, when the duration of exposure extended from 4 to 10 h, the Ltemp50 and Ltemp90 of female and male pupae were the lowest. Comparison of the lowest Ltemp50 and Ltemp90 with temperatures in January indicated that T. absoluta might not be able to overwinter in most of the northern and central regions of Xinjiang. However, in the southern regions, the extremely low temperature was higher than the Ltemp90, suggesting that T. absoluta has a higher overwintering potential in these regions. These results form a basis for predicting the dispersal potential and possible geographic range of this pest in Xinjiang. In addition, our findings provide guidance for the control of this pest by reducing overwintering shelters.

scholarly journals Occurrence of the South American Tomato Leaf Miner, Tuta absoluta (Meyrick) in Southern Shan, Myanmar

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 962
Author(s):  
Sopana Yule ◽  
Ni Ni Htain ◽  
Aung Kyaw Oo ◽  
Paola Sotelo-Cardona ◽  
Ramasamy Srinivasan
Keyword(s):  
Management Practices ◽  
Tomato Leaf ◽  
Tuta Absoluta ◽  
Leaf Miner ◽  
Invasive Pest ◽  
Economic Damage ◽  
South American ◽  
The South ◽  
Tomato Production ◽  
Tomato Leaf Miner

The South American tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), one of the most important invasive insect pests affecting tomato production worldwide, was for the first time detected in Myanmar. Preliminary surveys on pest occurrence on tomato crops in Myanmar suggested the presence of T. absoluta in Southern Shan State, but there was no official survey conducted until the end of 2019. Therefore, this study aimed to confirm the presence of T. absoluta in Myanmar. The presence of T. absoluta was specifically observed in the Southern Shan State, which is the largest tomato production area in Myanmar, where tomato is grown under two cultivation methods, floating and land cultivation. The highest T. absoluta infestation was recordedat Kalaw with (82%), followed by Inle Lake (i.e., floating cultivation) (20%) and Pin Ta Ya (10%). The amount of T. absoluta larvae was significantly higher in the lower third of the plants, followed by the middle section and upper section, respectively, in three fields surveyed. Potential and severe economic damage may be expected if management practices are not in place to reduce the presence of this invasive pest. It is of immediate importance that plant protection and quarantine offices of ASEAN member states coordinate their response to T. absoluta and build their capacity to monitor the pest and develop a strategy for when it arrives. In addition, a suitable management strategy is needed to reduce the occurrence of this invasive pest.

scholarly journals Genetic homogeneity in South American tomato pinworm, Tuta absoluta: a new invasive pest to oriental region

3 Biotech ◽  
2018 ◽  
Vol 8 (8) ◽  
Author(s):  
P. R. Shashank ◽  
S. Twinkle ◽  
K. Chandrashekar ◽  
Naresh M. Meshram ◽  
Sachin S. Suroshe ◽  
...  
Keyword(s):  
Genetic Homogeneity ◽  
Tuta Absoluta ◽  
Invasive Pest ◽  
South American ◽  
Oriental Region ◽  
South American Tomato Pinworm ◽  
Tomato Pinworm

scholarly journals Low temperature tolerance of human embryonic stem cells

2006 ◽  
pp. 124-129 ◽  
Author(s):  
Boon Chin Heng ◽  
Kumar Jayaseelan Vinoth ◽  
Hua Liu ◽  
Manoor Prakash Hande ◽  
Tong Cao
Keyword(s):  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Low Temperature ◽  
Human Embryonic Stem Cells ◽  
Embryonic Stem ◽  
Temperature Tolerance ◽  
Low Temperature Tolerance

scholarly journals Acylsugars in tomato leaflets confer resistance to the South American tomato pinworm, Tuta absoluta Meyr

2006 ◽  
Vol 63 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Juliano Tadeu Vilela de Resende ◽  
Wilson Roberto Maluf ◽  
Marcos Ventura Faria ◽  
Alessandra Zawadzki Pfann ◽  
Ildon Rodrigues do Nascimento
Keyword(s):  
Tuta Absoluta ◽  
Wild Accession ◽  
South American ◽  
Resistance Level ◽  
Plant Damage ◽  
F2 Population ◽  
South American Tomato Pinworm ◽  
Lesion Type ◽  
Parental Lines ◽  
Interspecific Crossing

Acylsugars present in the accession 'LA716' of Lycopersicon pennellii play an important role in the resistance to Tuta absoluta. This paper investigates the possible association between the resistance to T. absoluta and the acylsugar contents in F2 and F2BC1 tomato plants derived from the interspecific crossing between L. esculentum 'TOM-584' and L. pennellii 'LA716'. From the F2 population, four high acylsugars and one low acylsugars plants were selected and tested for Tuta absoluta resistance along with parental lines TOM-584 and LA-716, and with the checks TOM-600 (high 2-tridecanone line with resistance to T. absoluta) and TOM-556 (low acylsugar line). The genotypes were tested under natural field infestation and were evaluated for overall plant damage, leaflet lesion type and percent of attacked leaflet. Four plants from F2BC1 [=(Lycopersicon esculentum 'TOM-584' <FONT FACE=Symbol>´</FONT> F2)] were selected for high acylsugars and two for low acylsugars, and tested in greenhouse cages infested with T. absoluta. These genotypes were evaluated with the parental lines and the checks for oviposition ten days after infestation, and for leaflet lesion type and overall plant damage at four different dates. The F2 genotypes BPX-370Bpl#25, BPX-370Bpl#30 and BPX-370Bpl#79, the F2BC1 genotypes BPX-370B pl#30-380 and BPX-370B pl#30-271 and the wild accession LA716 had good levels of resistance to Tuta absoluta. The resistance level increased with longer exposition time to the acylsugars, both in the field and in the cage tests. Acylsugar contents seemed to be highly and negatively correlated with the traits related to the pinworm resistance.

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