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S. U. Zala ¹, K. A. Patel ², R. F. Thakor ²

Affiliations
1 Krishi Vigyan Kendra, Ambheti Gujarat, IN
2 Krishi Vigyan Kendra, Ambheti Gujarat, IN

Abstract

No Abstract

Keywords

Front Line, Demonstration, Finger Millet, Tribals, Rainfed

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Dinesh L. Patil ¹, K. A. Patel ², N. R. Toke ¹, Archana T. Ambule ¹

Affiliations
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (gujarat), IN
2 Main Sorghum Research Station (n.a.u.), Surat (gujarat), IN

Abstract

Biology of Tetranychus urticae Koch was studied under laboratory at 27.79 ± 4.40°C temperature and 79 ± 5.75 per cent RH during Sept. 2008. The finding showed that life cycle of T. urticae consisted of five stages viz., eggs, larva, protonymph, deutonymph and adult and one short inactive stage called quiescent stage. The eggs incubation period of T. urticae was 3.29±0.62 days. The larval body measured 0.14±0.01 mm in length and 0.10±0.01 mm in width and lived for 1.79±0.64 days in male and 2.71±0.57 days in female. The mature larva entered in a quiescent stage (nymphochrysalis). The total developmental period was longer in female (10.61±1.21 days) as compared to male (8.44±1.75 days). Mated female lived for longer time and laid higher number of eggs than unmated female. Mated female produced progeny consisting of both sexes, whereas, unmated female invariably gave rise to male progeny.

Keywords

Tetranychus Urticae, Biology, Carnation

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Dinesh L. Patil ¹, K. A. Patel ², N. R. Toke ¹, Archana T. Ambule ¹

Affiliations
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
2 Main Sorghum Research Station, Navsari Agricultural University, Surat (Gujarat), IN

Abstract

The acaricides tested for the bio-efficacy against Tetranchyus urticae under polyhouse conditions revealed that all the acaricidal treatments were significantly superior to untreated control in checking the mite population under polyhouse conditions. Among acaricides, propargite 0.05 per cent gave 69.19 per cent mite population reduction after two application. The next best treatment in order of effectiveness was abamectin 0.0025 per cent (63.34%) and it also exhibited consistent performance as second best treatment, followed by dimethoate 0.03 per cent (57.97%). However, the benefit cost ratio showed that propargite and dimethoate were most economical with net BCR of 1: 8.98 and 1: 8.93, respectively and gave effective control of T. urticae.

Keywords

Tetranychus Urticae, Carnation, Acaricides

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L. T. Kapur ¹, R. F. Thakor ¹, A. R. Patel ¹, K. A. Patel ¹

Affiliations
1 Krishi Vigyan Kendra, Ambheti, Valsad (Gujarat), IN

Abstract

A study was carried out to examine the changes in soil chemical properties and crop yields in a area of Asma village of Valsad district (Gujarat). The result showed that the mean values of soil pH and EC were increased with time. Although, average values of organic carbon, available P and available K were decreased year by year. Also difference between maximum and minimum values of soil pH, EC, organic carbon, available P and available K become larger with time due to greatly different in fertilizer application between farmers. Though the yields of crops were increased with cultivation of hybrid varieties but the changes in soil nutrient status have shown there might be need to improve soil management with application of organic and biofertilisers to sustain the fertility of the soil.

Keywords

Chemical Fertilizers, Soil, Nutrients, Soil Health.

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