The effect of tea seed crude saponin on the biological characteristics and mortality of mite (Brevipalpus obovatus donnadieu) in garden conditions

Articles in Press

Document Type : Research

Authors

1 Faculty member of Post-Harvest Physiology and Technology Department, Tea Research Institute, Lahijan, Iran

2 tea Research Institute - Lahijan - Iran

3 Tea Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization, Lahijan, Iran

10.22092/rhsj.2024.364504.1085

Abstract

The seed of tea plant (Camellia sinensis) has an organic compound with pesticidal activity called saponin, which is used in integrated pest management because it decomposes in a limited time and is safe for non-target organisms. The aim of this study was to investigate the effectiveness of tea seed crude saponin against the mite (Brevipalpus obovatus donnadieu). In this regard, crude saponin with concentrations of zero, one and two percent in three regions of Gilan (East, Center and West), two years (1400-1401) and in three time periods (April, June and September) in tea gardens with severe pollution was sprayed. Three days after spraying, mite-infected leaves were randomly picked from 16 bushes and mites were counted by biometric method. The statistical design of split plots based on randomized complete blocks was used. The results showed that the quadruple interaction effect (three spraying treatments × three regions × two years × three time periods) is significant at the five percent probability level. spraying with a concentration of one and two percent in all locations, two years and three time periods, reduced the mite population compared to the control treatments. The mite population in spraying treatment with 2% concentration was reduced by half compared to 1% concentration. In this research, it was found that the best treatment to reduce the population of mite in garden condition was spraying with a concentration of two percent. The results of examining the biological characteristics of mites in the best treatment showed that survival and reproduction decreased and the length of the biological period before maturity increased.

Keywords

Main Subjects

Research in Horticultural Sciences

Articles in Press, Accepted Manuscript
Available Online from 05 February 2025

Files

Share

How to cite

Statistics