| Geographical distribution pattern of two-spotted spider mite in apple orchards of the northern agricultural regions of Iran. |
| Paper ID : 1118-IPCA5 (R2) |
| Authors |
|
Maryam Rezaie *1, Reza Jvannezhad2 1Plant Protection Institute 2Shaid Satari univercity |
| Abstract |
| Two-spotted spider mites damage a wide range of plants in greenhouses, fields and orchards. Recognizing the distribution of this pest using climate data, geographical diversity can be of great help in better pest management. The MaxEnt model was used to estimate potential distribution in several stations (apple orchards) of four provinces of West Azerbaijan, Tehran, Mazandaran and Khorasan Razavi during the years 2017 to 2019. The number of the spider mites at designated stations in each province (at least 100 stations) was monitored weekly. Modeling the distribution of two-spotted spider mite was done using 19 climatic variables (annual mean temperature, mean diurnal range, isothermally, temperature seasonality, max temperature of warmest and coldest month, temperature annual range, mean temperature of wettest, driest, warmest and coldest quarter, annual precipitation, precipitation of wettest, driest Month, precipitation seasonality, precipitation of wettest, driest, warmest, coldest quarter) with presence only species records. On the other hand, according to the climate patterns of these four provinces and climatic environmental factors governing climatic conditions such as temperature, precipitation, which play a key role in the distribution and incidence of mites, modeling has been done separately in each province. Due to the weather conditions in 2019, the temperature was higher in different regions and the duration of rains was shorter than last year, and this led to a relative increase in the population of the two-spotted spider mite. The time of outbreak has also changed with climate changes, causing pest control to be delayed in 2019 in some areas compared to the previous year. On the other hand, in each province in the plains and with lower altitudes, more mites were reported than in mountainous and highland areas, which was probably due to higher temperatures and lower humidity in these areas. Finally, with the implementation of the model and the results of Jack Knife test, it was found that for Khorasan Razavi and Mazandaran provinces, the minimum temperature of the coldest month is the most important factor in the distribution of this species. Jack Knife test of West Azerbaijan province also indicates the important role of the average temperature of the coldest season of the year for the distribution of two-spotted spider mite in this province. In Tehran province, rainfall is the hottest season of the year for the distribution of two-spotter spider mite, which indicates the relationship between the minimum temperature of the coldest season and rainfall in the warm seasons in the distribution of two-spotted spider mite. In general, the average temperature of the coldest month of the year has been the most important factor in the spread of this pest in different parts of the country. |
| Keywords |
| Meteorological parameters, distribution of two-spotted spider mite, modeling, sampling stations |
| Status: Abstract Accepted |
