Investigation of the effect of herbal and chemical insecticides on citrus scale Pulvinaria aurantii Ckll. and the characteristics Physico-chemical of Thomson navel orange fruit

Document Type : Research

Authors

1 Assistant Professor, Citrus and Subtropical Fruits Research Center, Horticultural Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ramsar, Iran

2 Postharvest Physiology and Technology department, Citrus and Subtropical Fruits Research Center, Horticultural Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Ramsar, Iran

10.22092/rhsj.2025.367927.1114

Abstract

Pulvinaria aurantii Ckll. is the most important scale in the citrus gardens of Mazandaran and Guilan provinces. In this study, the physico-chemical and appearance characteristics of Thomson Novel oranges caused by pest feeding and insecticides Dayabon, Dorsban, Acetamiprid and emulsifying oil were investigated in the form of a randomized complete block experimental design with 9 treatments and 3 replications. The trees infected with the orange scale were sprayed in July. The characteristics of the fruits of the treated trees were evaluated at the time of harvesting and during cold storage for three months. The results of a two-year analysis of poison treatments on the orange scale nymphs revealed that there is a significant difference between the treatments at the level of 1%. after 7, 14 and 21 days. The spraying treatment with Dayabon at a concentration of 7.5/1000 had the greatest effect in controlling the pest with an average of 78, 85 and 84% of losses, respectively, and was placed in group A. The results showed that the amount of vitamin C (47.50 mg/100 g of fresh weight) in the treatment of Astamiprid with oil was significantly higher than all treatments. Fruits treated with Acetamiprid without oil and with oil had higher total soluble solids (11.38,11.34). The amount of fruit juice had the lowest amount (15.85) in the treatment with pest, without spraying and the highest amount (23.86) was in the treatment with Dayabon with oil. Therefore, using the herbal insecticide Dayabon to control the citrus scale is recommended.

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Research in Horticultural Sciences
Volume 4, Issue 1
September 2025
Pages 27-38

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