| Experiment code | 17.3.3.95 | ||
|---|---|---|---|
| Experiment Title | Estimation of crop loss due to spider mite on okra in field condition | ||
| Research Type | Departmental Research | ||
| Experiment Background | Okra, Abelmoschus esculentus (L.) Moench, also known as Lady’s finger, is one of the important vegetable crops commercially cultivated in many parts of the world and in almost all the states in our country. During the past three decades, our country has made commendable progress in the field of vegetable research and development, enabling it to secure second position in vegetable production and occupies 8.51-million-hectare area with a total annual production of 126.58 million tonnes. It is the single largest green vegetable exported to many parts of the world accounting for 60% of vegetable exports, excluding onion. It is mainly used for its tender green fruits as vegetable which is a rich source of minerals like iodine, calcium, sulfur and sodium and also contains vitamin A, C, thiamine and riboflavin. The major problem in limiting the productivity of okra crop is its susceptibility to a large number of insect pests including vectors. Over 37 insect pest species have been recorded causing damage to okra crop. Among the various insect pests such as whitefly, Bemisia tabaci Genn, the leafhopper, Amrasca biguttula biguttula Ishida, the red spider mite, Tetranychus urticae (Koch), the shoot and fruit borer, Earias vittella Fabricius and Earias insulana Boisd etc. are the major pests causing considerable damage or loss to the yield of okra crop. Among them, phytophagous mites, Tetranychus urticae Koch causes various types of direct damage to crops like loss of chlorophyll, stunting of growth, plant deformities resulting in reduction of yield etc. T. urticae is known to attack about 1200 species of plants, of which more than 150 are economically important. Defoliation, loss of chlorophyll, leaf bronzing, and even plant death occurs due to direct feeding in severe infestation. In severe infestation, tetranychid mites web profusely and may form a thick sheath of webbing that covers the entire plant. In vegetable crops, spider mite damage alone causes 10 to 15 per cent loss in yield. With the advent of intensive and extensive agriculture cultivation, mite pest has got the momentum and become emerging problems which requires more input in mite research, especially studies on diversity, damage potential and exploration of bio control agents for integrated mite control. For better management of mite pest, knowledge on seasonal population fluctuations, natural enemy complex and management of mite pest by effective chemicals is a prerequisite to mitigate the losses. | ||
| Experiment Group | Agricultural Entomology | ||
| Unit Type | (02)EDUCATION UNIT | ||
| Unit | (12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI) | ||
| Department | (259)Entomology Department, NMCA, Navsari | ||
| BudgetHead | (303/02092/0A)303/26/REG/00021 | ||
| Objective |
To know the yield loss due to spider mite in okra. |
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| Season | Summer | ||
| Location Unit Type | (02)EDUCATION UNIT | ||
| Location Unit | (12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI) | ||
| Location Department | (264)Entomology Department, NMCA, Navsari | ||
| Plot No | College Farm | ||
| PI Name | (NAU-EMP-2008-000170)ABHISHEK GYANESHCHANDER SHUKLA | ||
| PI Email | abhishekshukla@nau.in | ||
| PI Mobile | 9724304675 | ||
| Year of Approval | 2021 | ||
| Commencement Year | 2021 | ||
| Completion Year | 2024 | ||
| Design of Experiment |
Paired T test |
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| Crop Spacing (cm x cm) |
45cm X 30cm |
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| Gross Plot (m x m) | 3m X 5m | ||
| Net Plot (m x m) | Not Applicable | ||
| Total Experiment Area (m2) | 333 | ||
| Plot History Last Three Year |
Not Applicable |
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| Initial Soil Sample Analysis Report |
Not Applicable |
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| Initial Soil Sample Analysis Report Attachment | Attachment Not Available! | ||
| Layout Plan |
Not Applicable |
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| Layout Plan Attachment | Attachment Not Available! | ||
| Treatment |
The experiment will be carried out at College Farm, Navsari Agricultural University, Navsari. The okra variety Parbhani Kranti will be grown in the plot size of 4 m x 4 m with the spacing of 45 cm x 30 cm. Out of 12 plots, half (6 plots) will be kept as treated and other 6 plots will be kept as untreated control. The protected plots will be sprayed with propargite 57EC per cent at 15 days interval whereas unprotected plots will be allowed to damage by naturally occurring mite population. Mite incidence will be recorded, before each spray from three leaves each from top, middle and bottom canopies from 5 randomly selected plants from each plot. Mite population will be recorded from 2 cm x 2 cm. leaf area using a microscope. |
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| Treatment Attachment | Attachment Not Available! | ||
| (NAU-EMP-2008-000170) ABHISHEK GYANESHCHANDER SHUKLA | abhishekshukla@nau.in | 9724304675 | 19-02-2022 |
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| (NAU-EMP-2015-000240) KAPILKUMAR MOHANLAL PATEL | kapilpatel@nau.in | 7600058093 | 2022 |
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| (NAU-EMP-2018-000359) DEVABHAI SHIVABHAI RABARI | dsrabari@nau.in | 8511680714 | 2022 |
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| Okra | Kashi Kranti |