Experiment code WC-1
Experiment Title EFFECT OF PRE AND POST EMERGENCE HERBICIDES ON DIRECT SEEDED RICE AND THEIR RESIDUAL EFFECT ON SUCCEEDING CROPS
Research Type Departmental Research
Experiment Background Weeds are major biotic constraints in most rice growing areas of the world, causing about 33% of yield loss. Problems associated with weeds in rice are mounting due to changes in establishment methods in response to the declining availability of labour and water. Direct sowing of rice reduces labour and irrigation water requirements. Direct-sown rice (DSR) i.e., dry seeding facing more crop -weed competition in early establishment of rice. The high weed infestation is a major constraint for adoption of DSR, as emerging seedlings in direct-sown fields are less competitive with concurrently emerged weeds and the initial flush of weeds cannot be controlled by maintaining water immediately after seeding. In DSR, at least 2-3 manual weeding by engaging more than 100-150 person days per hectare is required to keep the weed population below the threshold level, but the paucity of labour and higher wages, the economic feasibility of rice cultivation is quite disturbed. A new formulation of selective herbicide i. e. Bispyribac sodium (20%) and Pyrazosulfuron ethyl (15%) in WDG with a highly efficient combination is available in market which controls all categories of weeds in rice crop. The novel combination ensures effective weed control with their dual eradication power. Therefore, herbicide-based weed control or combination of herbicide and machine/weeder are considered as alternative to manual-weeding and most economical way to manage weeds. Hence, the present experiment to be planned to evaluate the effect of pre and post emergence herbicides on direct seeded rice and their residual effect on succeeding crop under south Gujarat condition.
Experiment Group Natural Resource Management
Unit Type (02)EDUCATION UNIT
Unit (12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI)
Department (261)Agronomy Department, NMCA, Navsari
BudgetHead (303/12929/02)303/01/REG/00045
Objective

To examine the weed flora in direct seeded rice crop

To study the effect of different treatments on growth and yield of direct seeded rice crop

To evaluate the efficacy of different treatments for management  of weeds in direct seeded rice crop

Residual effect on succeeding crop
Season Kharif
Location Unit Type (02)EDUCATION UNIT
Location Unit (12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI)
Location Department (261)Agronomy Department, NMCA, Navsari
Plot No NA
PI Name (NAU-EMP-2011-000252)MADHUKANT SAVJIBHAI DUDHAT
PI Email msdudhat@nau.in
PI Mobile 9909461842
Year of Approval 2023
Commencement Year 2023
Completion Year 2025
Design of Experiment

RBD
Crop Spacing (cm x cm)

30 cm
Gross Plot (m x m) 3.60 m x 4.50 m
Net Plot (m x m) 2.40 m× 3.50 m
Total Experiment Area (m2) 486
Plot History Last Three Year

NA
Initial Soil Sample Analysis Report

NA
Initial Soil Sample Analysis Report Attachment Attachment Not Available!
Layout Plan

NA
Layout Plan Attachment Attachment Not Available!
Treatment

T1

:

Unweeded (Control)

T2

:

Weed free (20, 40 and 60 days after sowing)

T3

:

IC &Hand weeding at 20 & 40 days after sowing

T4

:

Pendimethalin  @ 1.0 kg a. i. /ha as Pre emergence(PE) 

T5

:

Pendimethalin  @ 1.0 kg a. i. /ha as Pre emergence(PE) fb hand weeding at 30 DAS

T6

:

Bispyribac sodium 20 g a. i. /ha at 20 DAS (PoE)

T7

:

Bispyribac sodium 20 g a. i. /ha at 20 DAS (PoE) fb HW at 40 DAS

T8

:

Bispyribac sodium fb Pyrazosulfuron ethyl 20 g a. i. /ha at 20 DAS (PoE) (Ready Mix)

T9

:

Bispyribac sodium fb Pyrazosulfuron ethyl 20 g a. i. /ha at 20 DAS (PoE) (Ready Mix) fbHW at 40 DAS

T10

:

Pendimethalin  @ 1.0 kg a. i. /ha as PE fb Bispyribac sodium + Pyrazosulfuron ethyl 20 g a. i. /ha at 20 DAS (PoE) (Ready Mix)
Treatment Attachment Attachment Not Available!
(NAU-EMP-2011-000252) MADHUKANT SAVJIBHAI DUDHAT msdudhat@nau.in 9909461842 13-03-2023
Active
Rice GR-6
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