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Researcher Mudavathrajashekhar
Advisor Ravinderreddy, K.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher COLLEGE OF HORTICULTURE, RAJENDRANAGAR, HYDERABAD - 500 030
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Light & infrared & ultraviolet phenomena
Subject Keyword Ipm Modules and Pesticide Residue Pattern ♦ Randomized Block Design. ♦ Validation of Different Ipm Modules and Pesticide Residue Pattern In Okra [abelmoschusesculentus(l.) Moench.] ♦ Horticulture ♦ This Region Falls Under Vi Agro Climatic Zone of Telangana State. The Experiment Was Laid Out In Randomized Block Design With Eight Treatments.
Abstract Field and lab experiments were conducted during kharif 2014 to study the “Validation of different IPM Modules and Pesticide Residue Pattern in Okra [Abelmoschus esculentus(L.) Moench.]†at College Farm, College of Horticulture, Rajendranagar, Hyderabad and All India Network Project on Pesticide Residues, Rajendranagar, Hyderabad, Telangana. The field experiment was laid out in a Randomized Block Design with eight IPM modules which were replicated thrice. During the entire crop growth, the minimum mean larval population of Earias vitella (0.16 larvae per plant) was observed in Insecticide Module (M7) which was on par with Dr.YSRHU recommended Module (M4), NCIPM recommended Module (M5) and Bio intensive Module + Insecticide Module (M6). The maximum mean population of E. vitella was (2.86 larvae per plant) observed in untreated check (M8). The data recorded on percent shoot damage during crop overall period revealed that Bio intensive Module + Insecticide Module (M6) was best in which least percent shoot damage was observed. The maximum mean percent shoot damage 14.83 was recorded in control (M8). The percent fruit damage by E. vitella during crop period revealed that Insecticide Module (M7) module was found best which was on par with Bio intensive module + Insecticide Module (M6). In the entire okra crop period the mean population of leaf hoppers was significantly minimum (1.99/leaf) in Insecticide Module (M7) which was on par with NCIPM recommended Module (M5) and Bio intensive Module + Insecticide Module (M6). The maximum mean population of leaf hoppers was (6.69) observed in control Module (M8). The overall mean population of whiteflies (0.45 per leaf) during entire crop period was observed minimum in Insecticide Module (M7) which was on par with NCIPM recommended Module (M5), Bio intensive Module + Insecticide Module (M6). The thrips population (0.95 per leaf) was found significantly minimum in Bio intensive Module + Insecticide Module (M6) which was on par with Insecticide Module (M7). The maximum mean population of thrips was (3.74/leaf) observed in control (M8). Regarding mites significantly minimum population (0.14 mites per leaf) was observed in Insecticide Module (M7) which was on par with NCIPM recommended Module (M5), Bio intensive Module + Insecticide Module (M6) while the maximum mean population of mites was (4 mites/leaf) observed in control (M8). The mean population of coccinellids was significantly maximum (2.05/leaf) in control (M8) which was on par with NCIPM recommended module (M5). The maximum net returns (Rs. 2,07,100ha-1) were recorded in NCIPM recommended module (M5) followed by Dr.YSRHU recommended module (M4), Bio intensive module + Insecticide Module (M6) Bio intensive module (M2). The benefit cost ratio 3.91 was highest in NCIPM recommended module (M5) followed by Bio intensive module (M2), Insecticide Module (M7) and Bio intensive module + Insecticide Module (M6). In residue analysis the okra samples collected from non IPM farmer‟s fields had pesticide residues of quinalphos (0.003ppm), ethion (0.35ppm), bifenthrin (0.02ppm), triazophos (2.01ppm), chloropyrifos (0.05ppm) and (0.08ppm). However the okra samples collected from IPM fields did not have any pesticide residues. Among the weather parameters in the present study, sunshine hours showed significantly positive correlation (r = 0.408) while minimum temperature, morning Relative humidity, evening Relative humidity, rainfall and rainy days were shown significantly negative correlation on Earias vitella. A significant positive correlation was found between maximum temperature(r = 0.581), sunshine hours (r = 0.561) and percent shoot damage whereas rainfall, rain days, evening R. H and minimum temperature were shown significantly negative correlation. For percent fruit damage, sunshine hours and maximum temperature had significant positive correlation while rainfall, rainy days, minimum temperature and morning relative humidity were shown significant negative correlation. The sunshine hours and maximum temperature were found significant positive correlation whereas rainfall, rainy days, minimum temperature and morning Relative humidity were shown negatively significant correlation on percent fruit damage. The morning Relative humidity and sunshine hours were positively correlated with leafhoppers population while rainfall and rainy days were shown significant negative correlation. The results of simple correlation between whiteflies and weather parameters indicated that a significant positive correlation (r = 0.361) was observed at maximum temperature and sunshine hours. Minimum temperature evening Relative humidity, rainfall and rainy days were negatively associated with whiteflies population. Maximum temperature (r = 0.371) and sunshine hours (r = 0.500) found to exert a significant positive correlation with thrips population while minimum temperature (r = - 0.420), rainfall (r = - 0.585) and rainy days (r = - 0.770) were found to exert negative significant action on thrips population. Regarding mite population the maximum temperature (r = 0.581) and sunshine hours (r = 0.551) found to be exert a significant positive correlation while minimum temperature (r = - 0.754), rainfall (r = - 0.423) and rainy days (r = - 0.807) had negative significant action. A significant positive correlation (r = 0.571) was found between morning Relative humidity and coccinellids population whereas Evening relative humidity (r = - 0.351), rainfall (r = - 0.557) and rainy days (r = - 0.633) were found to exert negative significant action on coccinellids population. During the total crop period the population of E.vitella was negatively regressed with maximum temperature, minimum temperature, evening relative humidity and rainfall but positively regressed with morning relative humidity, sunshine and rainy days. The population of leaf hoppers was positively regressed with minimum temperature, relative humidity, rainfall, sunshine and rainy days. The population of whiteflies was positively regressed with maximum temperature minimum temperature, relative humidity and rainfall. It was negatively regressed with sunshine and rainy days. During the total crop period, the population of mites was negatively regressed with maximum temperature and evening relative humidity but it was positively regressed with minimum temperature morning relative humidity, sunshine, rainfall and rainy days. The population of coccinellids was positively regressed with maximum temperature, morning relative humidity and evening relative humidity but it was negatively regressed with minimum temperature, sunshine, rainfall and rainy days. In overall, the weather parameters jointly had non significant impact on population build up of mites and coccinellids.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Andhra Pradesh
Size (in Bytes) 1.96 MB
Page Count 120
Starting Page 1
Ending Page 120