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STATUS OF RESIDUES OF COMMONLY USED PESTICIDES IN MANGO

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Title STATUS OF RESIDUES OF COMMONLY USED PESTICIDES IN MANGO
 
Creator TAYADE, SHAILESH C.
 
Contributor PATEL, Z.P.
 
Subject mangoes, fruits, pesticides, diseases, irrigation, heterocyclic compounds, harvesting, vegetables, crops, manpower
 
Description Invest igat io ns on mo nitor ing of pest ic id e res idues,
bioef f icac y, d iss ipat io n and d econtaminat io n o f commonly used
pest ic ides, in mango und er south Gujarat cond it ion were car r ied
out at Food Quality Test ing Laboratory, Navsar i Agr ic ultural
Univers ity, Navar i-396 450 and fa rme r’ s orchard at village Kes a li
dur ing summer, 2011-2013. Major ity of the farmers (68.62 %) d id
not care about res id ual ef fect of pest ic ides on human being,
animals and enviro nment and 64.70 p er cent of growers found
unaware about the recommended doses and spray interval o f
pest ic ides. In a numb er o f cases , 67.64 per cent of mango growers
were ab le to id ent ify and conf irm the at tack of p ests and d iseases.
Approximately 19.60 per cent of mango growers consult dealers
for the id ent if ic at ion of pest and d iseases , 38.23 per cent growers
found app lying pest ic id es on the b as is of their own exper ienc e.
Moreover, 23.52 p er cent of farmers sprayed pes t ic ides o n
contractual servic es. Among al l the mango samp les co llected f rom
south Gujarat regio n, none o f the mango samp le (co llected f rom
var io us locat io ns) was fo und contaminated with targeted pest ic id es
and well below the detectab le limits of 0.06 ( imid ac lopr id ), 0.07
( lambda-cyhalothr in), 0.05 (quinalp hos), 0.06 (c arb end azim) and
0.06 (hexaconazo le) μg g-1.
Bio ef f icac y of insect ic ides ind ic ated that imid ac lopr id at
0.005 per cent estab lished its super ior it y by imp ar t ing lowes t,
26.97 hoppers/10 panic les and highest 64.85 per cent red uct io n
over contro l. Treatment of lambda-cyhalo thr in at 0.0025 per cent
and quinalp hos at 0.05 per c ent d id no t d if fer s ignif icant ly f rom
eac h other b y imp ar t ing 34.77 and 39.38 mean hoppers populat io n
and 54.62 and 48.61 per cent reduct io n of hoppers populat ion over
contro l, respect ively. Moreover, the t reatment of carb end azim at
0.025 per cent pro ved its remarkab le per formance by imp ar t ing
signif icant ly lowest PDI value of 16.0 3 and maximum of 52.53 per
cent d is eas e reduct ion of mango anthrac nose. While, hexaconazo le
at 0.0025 p er cent found most ef fect ive against powdery mild ew o f
mango by imp ar t ing lowest PDI value of 15.37 and highest per
cent reduct io n (56.72) over contro l .
Diss ipat io n stud ies of commonly us ed pest ic ides in mango
revealed that half life and wait ing per iod for imidac lopr id at 0.005
per cent were 2.78 and 1.04 days, respect ively, while it was 2.52
and 3.18 d ays for imidac lopr id at 0.01 per cent. Lambdacyhalothr
in at 0.0025 p er c ent in/on mango f ruits showed half life
per iod of 2.98 d ays and 6.39 d ays of wait ing per iod. Whereas, in
double to recommended dose (0.005%) the half life per iod of 3.23
days and wait ing per iod of 10.39 days was observed. The
diss ipat io n of quinalp hos at 0.05 per cent showed 2.04 days as half
life as well as 8.94 days as wait ing p er iod . While in doub le to
recommend ed (0.01 %) it was 2.19 and 12.20 days as half life and
wait ing p er iod, respect ively. In cas e of hexaconazo le at 0.0025 and
0.005 per cent, 2.29 and 2.16 days as half life and 13.8 and 15.19
days of wait ing per iod were worked out in both the doses,
respect ively. The regress ion equat ion fo r carbendazim (0.025 %)
was f it ted as y= -0.105x + 2.440 (R2 = 0.88) with a half life o f
2.80 d ays. While, in doub le to recommended dose 0.05 per c ent , a
half life was 2.70 days .
The d ata on d econtaminat io n of p est ic id e res id ues due to ho t
water treatment at 480C for 60 minutes revealed that 67.11 and
66.71 per c ent reduct io n o f imidac lopr id res id ues was observed in
recommend ed (0.005%) and doub le to recommended doses
(0.01%), respect ively. In case of lambda-cyhalothr in, 83.45 and
79.33 per cent reduct io n of lambda-c yhalo thr in res idues was
observed in recommend ed (0.0025 %) and doub le to recommended
doses (0.005 %), respect ively. Decontaminat ion of q uinalphos
res id ues was 64.78 and 66.55 p er cent reduct io n of q uinalphos
res id ues were obtained in 0.05 and 0.1 per cent concent rat io n,
respect ively. Among all the p est ic id es evaluated fo r hot water
treatment, carbendazim imp ar ted lowest (57.31 and 58.36 %)
eliminat io n of res id ues in both the recommended (0.025%) and
double to recommended (0.05 %) doses. The extent of res idues
eliminat io n of hexaconazo le in both the concent rat io ns (0.0025 and
0.005 %) were to the tune o f 72.95 and 69.43 per cent and found
above MRL value of 0.02 mg kg- 1.
 
Date 2016-05-04T10:44:30Z
2016-05-04T10:44:30Z
2014-05
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65773
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari