MANAGEMENT OF MAJOR INSECT PESTS OF MUSTARD 1949
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Date
2014-11
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
JAU,JUNAGADH
Abstract
Investigations on Management of major insect pests of mustard were carried
out at College Farm, College of Agriculture, Junagadh Agricultural University,
(Gujarat) during Rabi season of the year 2012-13 and 2013-14.
Studies on population dynamics of major insect pests of mustard revealed that
incidence of aphid commenced in 3"^^ week of December during 2012-13 and 2013-14.
Its population increased, thereafter, gradually and reached to its peaks with 4.92 and
4.26 aphid index in 3'^ and 5^^ week of February during 2012-13 and 2013-14,
respectively. Correlation of aphid population with minimum temperature (r = -0.611 )
and evening relative humidity (r = -0.518*) were found significantly negative dunng
2012-13, while significant positive correlation (r = 0.502 ) was noticed with minimum
temperature during 2013-14.
The incidence of sawfly started in 3'^'' week of December and attained a peak i.e.
3.72 and 3.59 larvae/plant during and 2"'' week of January during 2012-13 and 2013-
14, respectively. The sawfly exhibited highly significant negative correlation with
maximum (r = -0.637** and -0.702**), minimum (r = -0.623 and -0.625 ) and mean
temperature (r = -0.712** and -0.692**) during 2012-13 & 2013-14, respectively. While,
significant positive correlation (r = 0.506*) was observed with bright sunshine hours
during 2013-14.
The incidence of leaf webber was noticed in d'" week of December and
attained a peak activity of 6.89 and 7.88 larvae/plant during the 4' week of February
during both years. Leaf webber exhibited significant negative correlation with
minimum temperature (r = -0.503*), evening (r = -0.596 ) and mean relative h^idity
(r = -0 502*) while significant positive correlation (r - 0.545 ) was found with bright
sunshine hours during 2012-13. A significant positive co^elafion was also found with
minimum temperature (r = 0.498*) and evening relative humidity (r - 0.509 ) during
2013-14.
The incidence of painted bug started in 3'" week of December in both years
and attained first peak during the P' week of January i.e. 6.75 bugs/plant. Whereas,
second peak i e 7.05 bugs/plant was noticed during the 3 week of Januaiy during
2012-13. Incase of 2013-14, the population of painted bug attained a firct t •
6.95 bugs/plant during 2"' week of Januao- and second pel Te 5 9^ hrf,"'
dunng 3' week of Februaiy. Painted bug exhibited highly significant neuat
assoemtton wtth maximun. (r = -0.755- and -0.790"). minit^^umTr = T743-
-0.726 ), mean temperature (r = -0.847 and -0 789**1 wherenc cjI,-#-
correlation (r = -0.498- and -0.497-) was obsen-ed with evaporati™ ^th '
(-1.590?:„d';Sti:et"ve;" anr^"^
respectively. Whereas, negatively high (-1.4828 and -1 2178^ temperature,
(1.2479) direct effect were noticed by minimum temperature wind high
temperature, respectively, on mustard sawflv nnnniaf,-rx„ -r,. ' and mean
Lcinperature wmH o j —® temperature, respectively, on mustard sawfly population Tht^'^JT mean
(-2.0215) exerted negatively very high direct effect while mean ^^i^hve humidity
and moming relative humidity (1.2839) exhibited negative aL ("1.1341)
iefnffelcute nocne pio.pe.u l6a.ti6o3n7 9b,u i5l.d5-1u1p1 o,f 3 l.e0a0f 9W4e babnedr ,2 r.e2s9pe6c4t iwveelrve Pnoh.fv Ppj^'h^® h^i'gghh ddiirreecctt
temperature, minimum temperature, moming and evenin^"^^ , maximum
respectively, while, mean temperature (-10.893) and mean r^laf humidity
wweerree eexxhhiibbiitteedd nneeggaattiivvee aanndd vveerryy hhiigghh ddiirreecctt effect whlmf^!^^ ^^midity ((-"55..117722Q9^)
dS^^olflO.'"' Of PaiSb":^™
beetle wPa's™ n"ogt2ic0e1d3 p"o1s4it,i dvierleyc vte erfyf ehcitg ho f(2 m.e0a9n63 t)e amnpde rhaitguhr et la nd nn i • ladybird
minimum temperature exhibited negatively very high direct cff,- !' J®^P®®hvely while
population. The minimum temperature and mean S f ^
negative (-1.1270) and positive (1.3670) high direct influence onTo f ^'^erted
mus ard sawfly respectively. The direct influence of m^^
positively very high (2.2219) while, mean temperature a^^ u ""P'^^hire shoL J
exerted negatively very high (-2.0822) and high (-1 35on T sunshine hour of leaf Webber. The mean temperature and mLn briif''''' po^
moderately negative (-0.8748) and positive (0.6957) dire« eS oxhibltS
up of painted bug in mustard. ettect on population build
Among the different insecticidal schedules tested for tt, •
eornplex of mustard showed that schedule 4 (flonicamid 0 02 Z "gainst pest
0.014 per cent, azadirachtin 0.15 per cent and aceohafe + r SubendarTiH
found most effective against mustard aphid and painted"h ° per cemf
(thiamethoxam 0.006 per cent, emamectin benzoate 0.0025 per® ***''"• ^^hedule 3
kgflia, chlorpynphos + alphamethrin 0.055 per cen^ I fUevi I
sawfly and leaf Webber of mustard. found superior
against
6116.17.22 4p piern ceenrt ryt^eltd rtnrerieSaste o^vlerf cponrtreo^l rwhpil^e^ utnp'r:o'te'e?t edX''r' was es"fhowS
kg/ha wTihthe e1c6o0n.4o mpiecrs coefnditf ifnecrreenats ien s(eocvteirci dcaoln tsrcohle dautl e'r grain viain kgd,,
return ?/ha 29674 and ICBR 1:6.27 was obti^h^ed f°°® ne^
yield obtained from schedule 3 i.e. 1218 kgdia S schedule 4 ^/ha 26566 as well as ICBR 1:6.28 was foutd^^i ~ and I''
Description
Keywords
Entomology