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Showing 3 results for KAZEMI
Methodofdetectionmancozebfungicide residue in cucumber fruit
Safarali Mahdian, Seyed Yahya Kazemi, Behnam Amiri,
Volume 1, Issue 1 (3-2012)
Abstract
Vegetables are attacked by different pests and diseases during their growth. Some fruits such as cucumber have sprayed regularly against diseases like Pseudoperonosporacubensisspecially in humid areas, and after a short time the cucumber are picked up and the amount of pesticide residue are measured and comparing with Maximum Residue Level (MRL). In this research the amount of Mancozeb fungicide has quantified in cucumber samples in Sari district. So in this order 26 samples of cucumber are collected and were carried to the laboratory. Samples of fruits are weighted and washed by using of n- hexan in Suksoleh device. After concentrating the obtained solution put in spectrophotometer set for measuring the optical density with 280 nanometer wave lengths and the amount of uv absorbance of samples and standard solutions were checked. The obtained numbers was changed into all right amount of mancozeb by using Excel software and Cx= α. Cs / β. Vx equation. Results showed that the amount of remained mancozeb fungicide was less than maximum residue limit in 77 percent of samples and more than maximum residue limit in 23 percent of samples in these periods. Also it defined among the samples which have had residue higher than standard limit, just 2 samples have been increased more than 1 milligram per kilogram.
Effect of Nano-Chitosan on Early Blight Disease of Tomato
Aida Ahmadizadeh Esfahani, Mehdi Sadravi, Sholeh Kazemi,
Volume 8, Issue 2 (9-2019)
Abstract
Ahmadizadeh Esfahani A, Sadravi M and Kazem S (2019) Effect of nano-chitosan on early blight disease of tomato. Plant Pathology Science 8(2):102-109.
DOI: 10.2982/PPS.8.2.102.
Introduction: Early blight caused by Alternaria species is one of the most important tomato diseases in the world. The disease has been reported from most areas in Iran with up to 90% infection. This study was conducted to investigate the effect of nano-chitosan on the severity of the ‎disease and its use as a replacement‎ of the chemical fungicide, chlorothalonil. Materials and Methods: Diseased tomato plants of fields and greenhouses of Fars province in southern Iran were sampled. Pathogens were isolated from diseased tissues, purified and identified by studying their morphological characteristics. The effect of nano-chitosan at three concentrations of three, five and seven grams per liter and the fungicide chlorothalonil were tested before and after inoculation of two pathogens. The disease severity indexes were measures in Sunseed and 16 cultivars of tomato under greenhouse conditions using a factorial experimental in completely randomized design with four replications. The data were analyzed with comparing the means. Results: The isolated pathogens were identified as A. solani and A. alternata. Results of the greenhouse experiment showed that A. solani was more aggressive than A. alternata and the cultivar 16 was more resistant to the disease. Nano-chitosan at 5 and 7 mg/ l significantly reduced disease severity indexes when use before pathogen inoculation, and at 7 mg/l when use after pathogen inoculation. Conclusion: Nano-chitosan can be used as a bio-fungicide to replace chlorothalonil as a chemical fungicide for disease management.

The effect of four herbal compounds on root-knot nematode of kiwi
Forough Kazemian, Salar Jamali, Zohreh Alipour, Seyed Mohsen Nasaj Hosseini,
Volume 12, Issue 2 ((Spring and Summer) 2023)
Abstract

Kazemian F, Jamali S, Alipour Z, Nasaj Hosseini SM (2023) The effect of four herbal compounds on root-knot nematode of kiwi. Plant Pathology Science 12(2):27-40. 

Introduction: Root-knot nematodes damage is one of the major problems in kiwifruit production in northern Iran. This research was carried out to investigate the possibility of using dried leaves of four plants to manage kiwifruit root-knot nematode. Materials and Methods: The soil and roots of diseased kiwifruit from the gardens of Rudsar City, Gilan Province, Iran were sampled and their root knot nematode was purified using the single egg mass method on the early Urbana tomato variety. The morphological characteristics of nematode second stage larvae and females were examined and nematode species were identified. By using the single egg mass technique, the necessary nematode population was reared on the early Urbana tomato. The effect of dry leaves of chrysanthemum, parsley, guava and oleander in two rates of 50 and 75 grams per kilogram of soil was evaluated in greenhouse conditions. The experiment was conducted in a completely randomized design with four replicates for each treatment on nematode-inoculated kiwi seedlings of Hayward cultivar. Nematode-related indices (number of galls, egg mass, eggs and J2s in 250 g of soil and reproductive factor) and plant growth characteristics (seedling height; root length and volume; fresh and dry weight of roots and shoots) were measured. Results: The root- knot nematode causing the disease in this region was identified as Meloidogyne incognita. In addition to controlling the nematode, the treatments used improved the growth of the kiwi seedlings. The results of the mean comparison of data showed that the treatment of 75 g of chrysanthemum leaves had a greater effect on reducing nematode population indices than other treatments. The next effective treatments were chrysanthemum at the rate of 50g, parsley at the rate of 75g, parsley at the rate of 50g, oleander at the rate of 75g, oleander at the rate of 50g, guava at the rate of 75g and guava at the rate of 50g, respectively. Treatment with 75 g of chrysanthemums also had the greatest effect on improving the growth rate of tomato seedlings. Conclusion: Adding 75g of dry chrysanthemum leaves to each kilogram of soil will help reduce root nematode damage and improve the growth of kiwi seedlings.

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