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Master Degree Theses
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ThesisItem Open Access Determination of residues of carbaryl and endosulfan on in mango fruits(Department of Entomology NAU, Navsari, 1978-08) Valand, Vitthalbhai Maganbhai; Shah, A. H.ThesisItem Open Access The Effect of Carbaryl and Endosulfan on the pest Complex of Brinjal (Solanum Melongena L.) and Their Residual Persistance On/In the brinjal Fruits.(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 1980-09) Patel, Sureshchandra Hirabhai; Patel, S.HThesisItem Open Access Estimation of Losses and Control of Some Important Pests of Sorghum in South Gujarat(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 1981-07) Borad, P. K.; Mittal, V. P.ThesisItem Open Access Studies on Biology and Chemcial Control of Sugar Cane top Boree Seirdoophes sivella (F.) (Pyralidae : Lepidoptera) Under South Gujarat Condition(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 1975-06) Patel, M.D.; Shah, A. H.ThesisItem Open Access Studies of Stem borer, Chilu zvnellus swinhoe (Pyralididae : lepidoptera) on Hybrid Jowar In South Gujarat Area(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 1972-05) Patel, Balubhai M.; Shah, A. H.ThesisItem Open Access Biology and Chemical Control of Rice Earhead Bug, Leptocorisa acuta Thunberg (Coreidae : Hemiptera) on Rice(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 2002-07) Deore, Narendra Raghunath; Patel, J. R.'Human right' is a noble goal to work towards . But it can never be achieved as long as hundreds of millions of poverty stricken people lack the basic necessities of life. 'The population food problem' is, therefore worsening dramatically as the human grow frighteningly larger and the interval between doubling is shortened shortly. Increasing food production is very urgent goal as it is the most important for the country to meet the so called population explosion. Rice (Oryza sativa L.) is the most important staple food crop consumed by more than sixty per cent of the world population and known as a king of cereals. India occupies unique position in growing rice among the rice growing countries, putting largest area under rice in the world (about 28.68%). In India, the production of rice was about 85.50 million tonnes in the year 2000-2001 (Anon, 2002). It is also extensively grown cereal crop in Gujarat occupying the area of 6.4 lack hectares under rice and producing 9.5 lack tonnes of grain annually (Anon, 1997). About 90 per cent of the rice area in Gujarat is confined to South and Middle Gujarat consisting of Dang, Surat, .Valsad, Navsari, Vadodara, Kheda, Anand, Panchamahal and Ahmedabad districts. The crop is mainly grown in rainy season but also grown as a dry season crop during summer in Valsad,ThesisItem Open Access Effect of Packaging and Storage Temperature on the Selft-life and quality of Okra [Abelmoschus esculentus (L.) Moench] cv. Vnr Green(Vegetable Science Department, Aspee College of Horticulture and Forestry, Navsari, 2011-06) Shivaji, Tekale Ganesh; Ahlawat, T. R.- Quality (OVQ) scores. It also recorded significantly the lowest physiological loss in weight, chilling injury, respiration rate, reducing sugar and disease incidence. Significant differences were observed in physiological parameters, biochemical parameters and pathological disorders due to storage temperature. Between the two temperatures, storage at 12°C temperature (S d resulted in significantly higher chlorophyll and carotenoid content, ascorbic acid content, titrable acidity content and marketable fruits along with higher sensory scores. Physiological loss in weight, respiration rate, reducing sugar and disease incidence were significantly lower at 12°C temperature. Chilling injury was not observed at 16°C temperature (S2)' Packing okra fruits in LDPE bags of 200 gauge thickness and storing them at 12°C emerged. as the best post harvest treatment combination. Fruits subjected to this treatment combination had the best visual appearance, lower disease incidence and chilling injury, limited physiological loss in weight and optimal marketability. This treatment combination suppressed quality deterioration and extended the shelf life of okra by up to 12 days.ThesisItem Open Access Biology and chemical control of Serpentine leafminer, Liriomyza trifolii (Burgess) (Agromyzidae : Diptera) on tomato Lycopersicon lycopersicum (L.) Karst ex. Farwell(Entomology Department, N. M. College of Agriculture Gujarat Agricultural University, Navsari, 1997-09) Patel, S. D.; Patel, B. M.ThesisItem Open Access Bionomics and Chemical Control of Ietranychus Ludeni Zacher Infesting cowpea under South Gujarat Condition(Entomology Department, N. M. College of Agriculture Gujarat Agricultural University, Navsari, 1999-03) Patel, Kamleshkumar Chimanbhai; Rai, A. B.Investigations were carried out from May, 1997 to July, 1998 on "Bionomics and chemical control of Tetranychus /wkni Zacher (Acari : Tetranychidae) infesting c.owpea under South Gujarat condition" in field as well as in laboratory, Deprubnent of Entomology, Gujarat Agricultural University, Navsari. Studies on the biology of T. /udeni were carried out in laboratory at room temperature (29.2 I °C average temperature and 79.00% average relative humidity) during May to June, 1997. Both the sexes of T.ludeni passed through five stages viz., egg, larva, protonymph, deutonymph and adult. Three active feeding immature stages (larval and two nymphal) were each followed by a short period of quiscence. Various stages of both the sexes, their shape, sizes, colour, moulting, sexual behaviour etc. are descnbed in detail. The incubation period of eggs (irrespective of sexes) varied from 2.33 to 4.00 days (2.99 ± 0.44 days) . • There was 93 to 97 per cent hatching of eggs. The average developmental periodsin days for larva, protonymph and deutonymph were 1.00 ± 0.35, 0.69 ± 0.30 and 0.86 ± 0.24 in case of male and 1.14 ± 0.29, 0.79 ± 0.31 and 0.97 ± 0.27 in case of female. The combined larval-nymphal periods were on an average 5.07 ± 0.36 days and 5.82 ± 1.18 days for male and female, respectively. The mated females laid on an average of 53.84 ± 3.96 eggs during their average ovipositional period of 5.77 ± 0.56 days, whereas unmated females laid on an average 35.73 ± 3.83 during their average ovipositional period of 7.16 ± 0.95 days. The pre- oviposition and post-oviposition periods were 0.81 ± 0.65 and 0.94 ± 0.35 days, respectively for mated female and 1.57 ± 0.36 and 1.45 ± 0.34 days, respectively for unmated female. The unmated male (4.40 ± 0.80 days) and unmated female (9.24 ± 0.92 days) lived longer than mated male (2.02 ± 0.77 days) and mated female (6.74 ± 0.84 days). Mated female produced male and female progeny in ratio of I :4.59, whereas unmated female invariably gave rise to male progeny. Under life-table studies of T.ludeni when reared on cowpea leaf under laboratory condition, the net reproductive rate (Ro) was 34.41 female/female/generation in a precise generation time of 16.16 days. The innate capacity for increase, finite rate of increase, weekly multiplication and hypothetical F2 females were 0.2190 female/female/day, 1.66 female/female/day, 34.15 and 1184.05, respectively. On reaching the stable age-distribution, the contribution of various stages viz., egg, larva, protonymph, deutonymph and adult were to the tune of 69.82, 15.92, 7.78, 3.76 and 2.72 per cent, respectively. As regard to impact of mating and age of female on oviposition, the rate of oviposition following mating reached peak by 3rd day of adult life, while in case of unmated female it reached peak by 4th day of adult life. The unmated female produced fewer eggs (35.73 ± 3.83) than mated females (53.84 ± 3.96) despite the fact that the unmated female lived longer (7.16 ± 0.95 days) than mated female (5.77 ± 0.56 days). Study on the effect of webbing on ovipositionrevealed that individual female (r1udem) with web spun laid consistently higher number of eggs than the individual with removal of web spun. Two phytophagous Polyphagotarsonemus latus mites viz., T.ludeni (Tetranychidae), Banks (Tarsonemidae) and predatory mite, Amblyseius (Euseius) als/oniae Gupta (Phytoseiidae) were recorded on cowpea in the region. The incidence of red spider mite (T.ludem) commenced from 13th standard week (STW) being peak during 20th STW (May), whereas tarsonemid mite (P.la/us) appeared on the crop from 12th STW and attained peak during 18th STW (April). As regard to distribution pattelll of mite on the plant, T.ludeni preferred top canopy leaves followed by middle and lower canopy leaves. Similar trend was observed in case of P.latus. Spider mite, T.ludeni prefelled lower surface as compared to upper surface of the leaf. The incidence of predatory mite, A.alstoniae commenced from 13th STW being peak during 20th STW (May). The maximum density of spider mite, T.ludeni was recorded on late sown crop (23rd March) followed by 16th and 9th March sown crop, while early sown crop (9th February) had least incidence followed by 16th February sown crop. Further, peak incidence of spider mite on different dates of sowing was concentrated at 20th and 21st STW (May). Unlike spider mite, the maximum density oftarsonemid mite, th P. latus was recorded on early sown crop (9 February) sown crop followed by rd 16th February and 9th March sown crop. Whereas, late sown crop (23 March) had least incidence followed by 16th March sown crop. The peak incidence for different dates of sowing except 16th and 23rd March sown crop was concentrated at a period corresponding to 17th to 19th STW (April-May). The predatory mite was higher on those crops which also harboured higher population of prey mite. Interaction study between prey mite (T.ludeni and P.latus) and predatory mite (A. (E.) alstoniae) showed significant positive correlation. Inregard to influence of abiotic factors, the population of T.ludeni showed significant positive correlation with temperatures (maximum, minimum and average) and sunshine hours. The build up of P.latus was positively correlated with temperatures (maximum and average) and sunshine hours. The predatory mite, A.alstoniae showed a significant positive correlation only with temperatures (maximum, minimum and average). The joint contribution of all abiotic factors (temperatures, relative humidities, sunshine hours and rainfall) on the build up of T.ludeni, P.lotus and A.alstoniae were significant indicating 71.0, 68.0 and 74.0 per cent variation in population, respectively. In field evaluation of chemical pesticide including botanical (Neemark, Repelin and NSKE) and microbial (Bt.) pesticides, dicofol, monocrotophos, endosulfan and methyl-o-demeton were highly effective in reducing mite popUlation (67.64 to 79.09% reduction). However, the predatory mite markedely diminished in the plots treated with monocrotophos, methyl-o- demeton and dicofol (62.48 to 68.02% reduction) and to a lower degree in case of endosulfan (30.61% reduction). Spark was most toxic to predatory mite but was found less effective against prey mite. NSKE was least toxic to predatory mite but was least effective against prey mite. Mite predator also diminished in the plot treated with plant product (Neemark and Repe1in), endosulfan and microbial pesticide (Bt.), but to a lower extent (27.33 to 39.54% reduction) and gave appreable control of spider mite (42.02 to 70.90% reduction) which can be manipulated and offers great scope in Integrated Pest Management Stratagies against cowpea mite, T.ludeni.