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Influence of Climate Factors on Population Density and Damage of Peach Twig Borer, Anarsia lineatella Zeller (Lep.,: Gelechidae), in Saman Orchards, Iran
Zarir Saeidi
Plant Protection Department, Agricultural and Natural Resources Research and Education Center, Chaharmahal va Bakhtiari, AREEO, Shahrekord, Iran. , zarirsaeidi@yahoo.com
Abstract:   (21 Views)
The effect of climate factors on the population changes and damage of peach twig borer (PTB), Anarsia lineatella Zeller., was studied during 2007-2017 in Saman orchards, Iran. Time series data of climate and pest population were subjected to the Mann-Kendall trend analysis. Seasonal flight of the pest was studied using pheromone traps from May to October. The percentage of infested twigs was calculated during May and September, while the percentage of infested fruits was determined twice a month from July to September. Results showed increasing trends in the mean temperature of annual, winter and autumn seasons (Kendall's statistics were 0.63, 0.49 and 0.42, respectively). Moreover, there were significant increasing trends in annual mean minimum, mean maximum and absolute minimum temperatures (0.53, 0.63 and 0.46, respectively). The number of annual and January frost days (-0.55 and -0.51, respectively) and mean relative humidity of Jun, July, August, September and October showed decreasing trend. PTB population and damage showed significant and increasing trends during the studied years. According to stepwise regression analysis the percentage of relative humidity, mean annual minimum temperature and mean annual temperature were the most statistically significant variables influencing the percentage of infested branches (r= 0.94, r2=0.88 , F (3,6)= 14.40, P= 0.004) and pest population (r= 0.98, r2=0.96, F (4, 5) = 3.18, P= 0.001). The pest population and damage will increase under studied climate change scenarios (A1F, A1T, A1B, A2, B1 and B2) in the future, which is more significant in A1F than others.
 
Keywords: Anarsia, Infestation, Seasonal flight, Climate scenarios, Trend analysis
Full-Text [PDF 625 kb]   (24 Downloads)    
Article Type: Original Research | Subject: Ecology and Biological Control
Received: 2024/01/3 | Accepted: 2024/01/1
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