This document presents a thesis presentation on evaluating weed management techniques in summer groundnut. The presentation was given by Mr. Daki Raju and guided by Dr. B.K. Sagarka and Dr. N.M. Zalawadia. The research aims to evaluate the efficacy and economics of different weed control treatments and their effect on yield and yield attributes of summer groundnut. A field experiment was conducted using a randomized block design with 12 treatments and 3 replications. Preliminary results suggest that the highest production, profit and economic weed management can be achieved through a weed free treatment or integrated methods using pre-emergence herbicides with one hand weeding.

1. WEL COME
TO
THESIS
PRESENTATION

2. Presented By :
Mr. Daki Raju. N.
M.Sc. (Agri.) in Agronomy student,
College of Agriculture,
JAU, Junagadh
Major Guide:
Dr. B.K. Sagarka
Professor & Head
Dept. of Agronomy
Minor Guide:
Dr. N.M. Zalawadia
Professor,(P)
Dept. of Agril. Chemistry
and Soil Science
Title of research work
Member:
Dr. V. D. Khanpara
Ex. Professor & Head,
Dept. of Agronomy,
College of Agriculture,
JAU, Junagadh.
MEMBER:
Dr. S.M. Upadhyay
Professor and Head,
Dept. of Agril.
Statistics,
College of Agriculture,
JAU, Junagadh

3. Groundnut (Arachis hypogaea L.) is an annual legume crop,
belongs to family Leguminoseae. It is also known as peanut,
earthnut, monkeynut and goobers. It is world’s the largest source
of edible oil and ranks 13th
among the food crops as well as 4th
most important oil seeds crops of the world (Ramanathan, 2001).
Groundnut is grown in 11 states and accounts for total area of
6.7 million hectares with total production 6.6 million tons having
average productivity of 988 kg /ha (Anon., 2009). Out of the total
groundnut area in India, 80% area is confide to 5 states viz.
Gujarat, Andhra Pradesh, Tamilnadu, Karnataka and
Maharashtra, which accounts for 84% of total production.
Gujarat ranks first with the production of 17.57 lakh tons and
growth in area of 18.23 lakh hectares with a average productivity
of 964 kg/ha (Anon., 2009-2010).

4. India has low productivity and high cost production
Among the different agronomic practices, weed menace is one of
the serious bottlenecks for increasing the yield. Weed infestation
is depending on the weed intensity, the yield reduction in
groundnut may be as 76% (Mohanty et al., 2008). In view of slow
growth habit of the crop, mechanical control of weeds becomes
difficult due increasing cost and scarcity of labour. Under these
situations the chemical control of weeds is effective and
economical in the initial stages of growth.
Now a day, some important new herbicide molecule come in
the market for the control of monocots & dicots weed. Scientific
information on individual and integrated effects on weed
management in this crop is meager for this region.
Backround of research

5. 1) To evaluate the efficacy of different treatments
for control of weeds in summer groundnut.
2) To study the effect of different treatments on
yield attributes and yield of summer groundnut.
3) To find out the economics of different treatment.

6. Treatment Details:
T1: Pendimethalin @ 0.9 kg/ha PE + 1 HW at 40 DAS
T2: Oxyfluorfen @ 0.240 kg/ha PE +1 HW & IC at 40DAS
T3: Quizalofop-ethyl @ 40 g/ha POE at 20 DAS
T4: Quizalofop-ethyl @ 40 g/ha POE at 20 DAS + 1 Hw at 45
DAS
T5: Oxdiaragyl @ 90 g/ha POE at 20 DAS
T6: Oxdiaragyl @ 90 g/ha POE at 20 DAS + 1 HW at 45 DAS
T7: Imazethapyr @ 50 g/ha POE at 20 DAS
T8: Imazethapyr @ 50 g/ha POE at 20 DAS + 1 HW at 45 DAS
T9: Oxyfluorfen @ 0.240 kg/ha PE + Quizalofop-ethyl @ 40 g/ha
POE at 30 DAS
T10: Oxyfluorfen @ 0.240 kg/ha PE + Oxdiaragyl @ 90 g/ha POE
at 30 DAS
T11: Weed Free
T12: Weedy Check

7. 1. Location: Instructional farm,
Department of Agronomy,
College of Agriculture,
J. A. U., Junagadh.
2. Year and season of experiment: Summer -2011.
3. Statistical design: Randomized Block Design
4. No. of replications: Three (3).
5. Crop and variety: Groundnut, Gujarat Groundnut-6,(G.G.-6)
6. Seed Rate: 120kg/ha
7. Spacing: 30 x 10 cm
8. Method of sowing: Drilling
9. Fertilizer: 25 – 50 – 0, N P K, kg/ha
10. Plot Size:
a)Gross Plot Size: 5.0m x 2.4m
b)Net Plot Size: 4.0m x 1.80m

8. 2.4
m
5m
N
39 m
2 m
2 m
Layout plan of the experimentLayout plan of the experiment
15 m

9. A) Growth parameters
1) Plant population Initial and at harvest
2) Plant height at 30 DAS, 60 DAS and at harvest
3) No. of branches/ plant
4) Days to 50% flowering
B ) Yield attributes and yield
5) No. of mature and immature pods/ plants
6) pod and haulm yield(kg/ha)
7) weight of 100 kernels
8) Shelling (%)
9) Harvest index (%)
C ) Quality parameters
11) Oil content (%)
D) Weed studies
12)Species wise weed count at 30, 60 DAS & at harvest.
13)Dry weight of weeds at harvest.
14)Weed index.(%)
15) Weed control efficiency
E) Economic Evaluation
11)Cost of Cultivation ( /Ha)
12)Gross Return ( /Ha)
13)Net Return ( /Ha)
14)Benefit: Cost Ratio
A) Growth parameters
1) Plant population Initial and at harvest
2) Plant height at 30 DAS, 60 DAS and at harvest
3) No. of branches/ plant
4) Days to 50% flowering
B ) Yield attributes and yield
5) No. of mature and immature pods/ plants
6) pod and haulm yield(kg/ha)
7) weight of 100 kernels
8) Shelling (%)
9) Harvest index (%)
C ) Quality parameters
11) Oil content (%)
D) Weed studies
12)Species wise weed count at 30, 60 DAS & at harvest.
13)Dry weight of weeds at harvest.
14)Weed index.(%)
15) Weed control efficiency
E) Economic Evaluation
11)Cost of Cultivation ( /Ha)
12)Gross Return ( /Ha)
13)Net Return ( /Ha)
14)Benefit: Cost Ratio

25. Based on the results of the one year field
experimentation, it seems quite logical to conclude that
potential production, profit and economic weed
management in summer groundnut under South
Saurashtra Agro-climatic Zone can be achieved by
conventional method i.e. weed free condition with 4 HW at
20, 40, 60 and 80 DAS where from labours are easily
available. Alternatively integrated weed control method
including Pendimethalin @ 0.900 kg ha-1
as pre-emergence
with 1 HW + IC at 40 DAS, or Oxyfluorfen @ 0.240 kg ha-1
PE +1 HW & IC at 40 DAS can be adopted where farm
labour is scarce.

26. ThankThank
YouYou