STUDIES ON USE OF PESTICIDES IN CUCURBITS GROWING AREA OF NARAKODURU, GUNTUR DISTRICT

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dc.contributor.advisorSREENIVASA RAO, CHERUKURI
dc.contributor.authorDEVI VARAPRASAD SAI, ANNEPU
dc.date.accessioned2022-08-10T09:19:56Z
dc.date.available2022-08-10T09:19:56Z
dc.date.issued2022-08-10
dc.descriptionSTUDIES ON USE OF PESTICIDES IN CUCURBITS GROWING AREA OF NARAKODURU, GUNTUR DISTRICTen_US
dc.description.abstractThe studies on the seasonal occurrence of insect pests on cucurbits, as well as the various practices followed by cucurbits growers on pesticide use and handling were conducted during 2020 at Narakoduru village. Studies on pesticide residues in cucurbit farm-gate samples collected from Narakoduru were carried out at National Institute of Plant Health Management (NIPHM), Hyderabad, Telangana. Seasonal occurrence of insect pests revealed that major insect pests that cause damage to cucurbits are Diaphania indica (cucumber moth) which reaches its peak incidence during the fourth week of September (39th SMW) with a mean population of 2.71 larvae per plant, Raphidopalpa foveicollis (red pumpkin beetle) which reaches its peak incidence during the first week of October (40th SMW) with a mean population of 0.88 beetles per plant, Epilachna vigintioctopunctata (Epilachna beetle) which reaches its peak incidence during the fourth week of October (43rd SMW) with a mean population of 0.56 beetles per plant, Bactrocera cucurbitae (fruit fly) which causes peak fruit damage during the fifth week of October (44th SMW) with a mean fruit damage of 55.87 per cent and Liriomyza trifolii (leaf miner) which reaches its peak incidence during third week of September (38th SMW) with a mean population of 13.93 mines per plant. Diaphania indica, Raphidopalpa foveicollis, and Epilachna vigintioctopunctata populations were present during the entire study period on all cucurbits, but their populations never crossed ETLs, while Bactrocera cucurbitae and Liriomyza trifolii populations are above ETLs in almost all weeks in most of the farmer’s fields. xvii Cucurbit farmers were using pesticides very frequently, at least one spray in a week, and most commonly used pesticides are bio-product (155), monocrotophos (94), chlorantraniliprole (92), emamectin benzoate (35), acephate (30) and acetamiprid (28), in which all farmers are mixing bio-product every time with a synthetic chemical pesticide. The frequent pesticide applications were due to severe incidence of Bactrocera cucurbitae and Liriomyza trifolii during the entire season, above ETLs during the most of period of the study. Majority of farmers are using recommended dose of chlorantraniliprole (59.7%) and emamectin benzoate (71.42%), while monocrotophos, acephate (53.33%), cyantraniliprole (33.3%) are sprayed at higher dosages. Majority of cucurbit farmers (86.7%) are not aware about the registered and recommended pesticides on cucurbits as per Insecticide Act, 1968, while only 6.6% are aware about ban of monocrotophos on vegetables. All cucurbit farmers consult pesticide dealers for recommendations where as few farmers i.e. young farmers consult agricultural officers in addition to the dealer. Most of the spray men (57%) do not use any kind of personal protection equipment while spraying, while 20% wear separate cloths with full sleeves covering the entire, 17% spray men are wear gloves and 6.7% keep the mask. The studies indicate that the cucurbit growers have inadequate knowledge and limited awareness on various practices to be followed while handling/using pesticides, and the knowledge levels have no correlation with education levels of the farmers. The use of non-recommended pesticides or at higher dosages led to occurrence of pesticide residues, and that was clearly evident that 20 samples out of 30 samples were detected with pesticide residues. However, in view of the common practice of following 4 days interval between spray and harvest, the residues were below MRLs, except in one sample of bitter gourd in which chlorantraniliprole residues crossed MRLs. Commonly found pesticide residues in various cucurbit vegetables were, chlorantraniliprole in bitter gourds, acephate in bottle gourd, myclobutanil and chlorantraniliprole in coccinia, and carbendazim in ridge gourd. Risk analysis studies for chlorantraniliprole and myclobutanil on coccinia and acephate on bottle gourd were conducted to propose MRLs, and MRLs of 0.2 mg kg-1, 0.5 mg kg-1 and 0.6 mg kg-1 were proposed for chlorantraniliprole, myclobutanil and acephate on cucurbits.en_US
dc.identifier.otherD6229
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810186178
dc.keywordsSTUDIES , PESTICIDES ,CUCURBITSen_US
dc.language.isoEnglishen_US
dc.pages153en_US
dc.publishergunturen_US
dc.subEntomologyen_US
dc.themeSTUDIES ON USE OF PESTICIDES IN CUCURBITS GROWING AREA OF NARAKODURU, GUNTUR DISTRICTen_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON USE OF PESTICIDES IN CUCURBITS GROWING AREA OF NARAKODURU, GUNTUR DISTRICTen_US
dc.typeThesisen_US
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