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Anand Agricultural University, Anand

Anand Agricultural University (AAU) was established in 2004 at Anand with the support of the Government of Gujarat, Act No.(Guj 5 of 2004) dated April 29, 2004. Caved out of the erstwhile Gujarat Agricultural University (GAU), the dream institution of Sardar Vallabhbhai Patel and Dr. K. M. Munshi, the AAU was set up to provide support to the farming community in three facets namely education, research and extension activities in Agriculture, Horticulture Engineering, product Processing and Home Science. At present there seven Colleges, seventeen Research Centers and six Extension Education Institute working in nine districts of Gujarat namely Ahmedabad, Anand, Dahod, Kheda, Panchmahal, Vadodara, Mahisagar, Botad and Chhotaudepur AAU's activities have expanded to span newer commodity sectors such as soil health card, bio-diesel, medicinal plants apart from the mandatory ones like rice, maize, tobacco, vegetable crops, fruit crops, forage crops, animal breeding, nutrition and dairy products etc. the core of AAU's operating philosophy however, continues to create the partnership between the rural people and committed academic as the basic for sustainable rural development. In pursuing its various programmes AAU's overall mission is to promote sustainable growth and economic independence in rural society. AAU aims to do this through education, research and extension education. Thus, AAU works towards the empowerment of the farmers.

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Subject: Agricultural Entomology × End date: 2009 × Type: Thesis × Thesis Type: Ph.D ×
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Now showing 1 - 9 of 54
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    ThesisItemOpen Access
    STUDIES ON CHEMICAL CONTROL OF THE PEST COMPLEX OF SORGHUM WITH SPECIAL REFERENCE TO SHOOTFLY AND STEM BORER
    (AAU, Anand, 1981) PATEL, JITENDRA R.; JOTWANI, M. G.
    Abstract not Available
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    ThesisItemOpen Access
    BIONOMICS AND CONTROL MEASURES OF DUDHI BUG GAMPSOCORIS PULCHELLUS DALLAS Berytidae (Neididae) : Hemiptera
    (AAU, Anand, 1969) Singh, Ram; Patel, H. K.
    Abstract not available
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    ThesisItemOpen Access
    ECOMOMIC THRESHOLD OF INSECTICIDAL SPRAYINGS AGAINST BOLLWORMS (Heliothis armigera (Hb.) and Earias spp.) ON HYBRID-4 COTTON AT ANAND. (Comparison of need-based and calendar-based treatments)
    (AAU, Anand, 1980) Mulchandani, Lachmandas Nassanand; Patel, H. K.
    In a split plot designed experiment carried out during the years 1977-78 and 1978-79 the three treatment levels (damage thresholds) of 10, 15 and 20 percent bollworm damage to fruiting bodies of selected size-group (from full grown squares to young bolls) were evaluated on calendar-based and need-based schedules for their effects on yield, number of undamaged bolls, bollworm damage to retained bolls and loculi, shedding of fruiting bodies, and earliness in maturity. The applications of carbaryl 0.25 percent + DDT 0.25 percent mixture at 10 and 15 percent treatment levels were found to be equally effective in giving a maximum yield of (good seed cotton) when they were continued on need basis (Average 3506 and 3117 kg/ha at 10 and 15 percent levels respectively) and weekly basis (Average 3852 and 3409 kg/ha at 10 and 15 percent levels respectively). Amongst three frequencies of application under fixed schedules, the weekly-based frequency of application was the best.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    BIOLOGY, POPULATION DYNAMICS AND CONTROL OF HELIOTHIS ARMIGERA HUBNER ON IMPORTANT HOST CROPS IN MIDDLE GUJARAT
    (AAU, Anand, 1993) Mehta, D. M.; Patel, J. R.
    Investigations on biology, population dynamics and control of H. armigera on important host crops were carried out during 1990-91 and 1991-92 at the Department of Entomology, Gujarat Agricultural University, Anand Campus, Anand. The effect of larval food was not observed on egg period but larval period was affected. The larval period was shortest on lucerne (Medicaso sativa L.) leaves and longest on chickpea (Cicer arientinum L.) leaves. The maximum and minimum larval survival for both the sexes was . on chickpea pods and chickpea leaves respectively. it was reflected on growth index. The pupal duration on chickpea pods was short. The pupae obtained by rearing the H. armigera larvae on lucerne leaves and chickpea pods were big in size and pupation was very shallow. The adults obtained from lucerne leaves had long oviposition period and high fecundity. The life span for both the sexes was longest onchickpea leaves followed by tomato fruits, pigeonpea pods, tomato leaves, chickpea pods and lucerne leaves. The studies on population dynamics of H. armigera on various crops, weeds, medicinal and ornamental plants revealed ovipositional and larval activity during July to April. The correlation of various abiotic factors with U- armigera activity on pigeonpea showed negative correlation between egg density and soil temperature. Negative and positive association of minimum temperature, vapour pressure and soil temperature was observed with oviposition on tomato and lucerne, respectivly. On pigeonpea and chickpea larval activity was more influenced by soil temperature, whereas, on lucerne minimum temperature, vapour pressure, and soil temperature influence was observed. Considerable activity of an egg parasitoid Trichogramma spp. was found in the fields of tomato, tobacco and pigeonpea in middle Gujarat during October to December. Preliminary studies on resistance in 21 genotypes and 3 local cultivars of tomato to H. armigera revealed low damage to unriped fruits of Karnataka and Mangala and riped fruits of SL 120, F24C8 and Piersol. Karnataka and Mangala had higher marketable fruit yield than others. The degree of fruit damage by H. armigera was positively related with total soluble sugar and negatively with ascorbic acid. Low ovicidal and high ovipositional deterrent effect of neem seed kernel suspension and margoside was found against H. armigera. The spray application of these two botanicals alone as well as combinations with endosulfan at lower concentration gave effective protection to tomato fruits by preventing the larval activity of H. armigera and gave considerably higher marketable fruit yield. The spray application of neem seed kernel suspension with endosulfan had highest increase in yield and avoided 69.33% loss in marketable fruit yield. The residue of endosulfan in/on tomato fruits was quite below the tolerance limit prescribed by FAO/WHO when tomato crop was sprayed with a mixture of endosulfan 0.035% and neem seed kernel suspension (3%). Among the various recommended insecticides, fenvalerate (0.01%) showed quick and high toxicity to H. armigera larvae. The larvae fed on lucerne had higher susceptibility to all the recommended insecticides than the larvae fed on pigeonpea and chickpea.
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    ThesisItemOpen Access
    BIOLOGY AND CONTROL MEASURES OF BROWN SCALE, SAISSETIA COFFEAE WALKER ( HOMOPTERA : COCCIDAE) ON POINTED GOURD (TRICHOSANTHES DIOICA ROXB.)
    (AAU, Anand, 1986) VALAND, VITTHALBHAI M.; Patel, R. C.
    The biology and control measures of brown scale, Saissatia coffeae Wlk. (Homoptera : Coccidae) on pointed gourd (Trichosanthes dioica Roxb.) were studied. This scale is recorded for the first time as pest on pointed gourd on vines, leaves and at times on fruits in Gujarat State. It reproduces partnenogenetically and completes development through three instars. The eggs measured 0.212 ± 0.0096 mm. In length and 0.119 ± 0.006 mm. In breadth. The first, second and third instar measured on an average 0.31 ± 0.02, 1.521 ± 0.091 and 3.021 ± 0.144 mm. In length and 0.18 ± 0.1, 1.126 ± 0.101 and 2.427 ± 0.225 mm. in length and 2.093 ± 0.187 mm. In breadth. Maximum incubation period of eggs at 60% relative humidity and 24°C was 12.91 days.
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    ThesisItemOpen Access
    THE BIONOMICS AND CONTROL MEASURES OF TOBACCO BUG NESIDICORIS TENUIS REUTER (MIRIDAE : HEMIPTERA)
    (AAU, Anand, 1974) PATEL, NITYANAND G.; Patel, H. K.
    Abstract not Available
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    ThesisItemOpen Access
    STUDIES ON BIOMETRICAL ANALYSIS, GROWTH AND LIFE TABLES OF Heliothis armigera Hubner (LEPIDOPTERA : NOCTUIDAE) ON DIFFERENT HOSTS
    (AAU, Anand, 1984) Koshiya, Durlabhbhai Jivrajbhai; Patel, H. K.
    Investigations on biometrical analysis, growth and life tables of Heliothis armigera Hubner on different hosts via,, chickpea, cotton, groundnut, tobacco and wheat were carried out during 1980 to 1983 at the Department of Entomology, B.A.College of Agriculture, Anand either in Laboratory or under field conditions, Studies on biometrical analysis were carried out to test the applicability of Dyar's law to the larvae of H. arimigera, when reared on different hosts. The measurements of head capsule width (mm) of the larvae fall into five well defined groups, when the larvae were fed on chickpea, cotton, tobacco and wheat,whereas six distinct groups were recognised on groundnut at a constant temperature of 26 ± 1°c.
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    ThesisItemOpen Access
    Bioecological studies on Geocoris ochropterus Fieber (Hemiptera : Lygaeidae) , an important predator in cotton ecosystem
    (AAU, Anand, 1996) SHARMA, URMILA; Yadav, D. N.
    Bioecological studies on the big eyed bug, Geocoris ochropterus Fieber, an drnportant predator in the cotton ecosystem, were made during 1994-95 and 1995-96 seasons at the Anand Campus of Gujarat Agricultural University, Anand. Biological observations revealed that the predator laid yellowish white eggs singly on the plant parts which took 8.33 ± 0.27 days at varying temperature of 29.62 ± 0.38 to 30.36 ± 0.12°C, RH 84.26 + 1.25 % and L : D, 12:12 to hatch. Maximum hatching (82 %) was observed when the temperature tanged between 21.61 ± 0.23 to 23.5 + 0.76°C and RH 71.03 + 2.38 %. The predator passed through five nyraphal instars. The duration of the first, second, third, fourth and fifth instar was 5.5 + ©.22, 5.6 ± 0 . 20 , 5.6 + 0.20, 5.9 + 0.33 and 9.25 ± 0.23 days respectively. Total nymphal duration was 29.7 + 1.43 days. Nymphal mortality was high in the fifth instar (39.21 % ). Sexes can be differentiated from their size. Males are usually smaller. The sex ratio in the laboratory population and field population was 1:1.10 (male : female) and 1.29 :1 (male : female) respectively. Mating accomplished easily and lasted for 15m to 4h in the laboratory. The preoviposition, oviposition and postoviposition periods averaged 3.4 ± 0.47, 19.2 ± 2.84 and 3.6 ± 0.69 days respectively of the mated female. Fecundity, when reared on A. gossypii averaged 42.4 + 5.09 eggs. The daily rate of oviposition of laboratory reared female was 1.21 eggs/day and that of field collected female was 0.91 eggs/day. Daily rate of oviposition was greatly affected (6.2 eggs/day) when the females were fed on eggs of Earias vitirella + cotton leaf. Longevity of male and female was 19.9 ±3.68 and 29.5 ± 3.55 days respectively. The female lived longer when fed on eggs of Spodoptera litura + fresh cotton leaves and A. gossypii nymphs + fresh cotton leaves studies on predatory potential showed that maximum consumption was observed during fifth instar. The nymphs consumed an average 1 05 + 4.33 aphid nymphs before reaching maturity. The male and female consumed on an average 530.28 ± 61.74 and 634.14 ± 71.02 nymphs of A. gossypii respectively in their life span. Further, female of G. ochropterus consumed on an average 32.60 and 19.80 eggs of H. armigera and E. vitiella respectively per day. The predator was found to prey on twenty one species of pests occurring on thirteen crops and two weeds but there were about eight species of plants with which it was not found associated. Cannibalism, phytophagy and necrophagy was also observed. G. ochropterus was found fairly well distributed in cotton growing areas of Gujarat. The predator was found relatively free from natural enemies. Only in one case, egg parasitisation by an unidentified eulophid was recorded. The adult was predated upon by an unidentified reduviid bug and a spider. Insecticides such as Methyl-o-demeton, endosulfan, quinalphos, monocrotophos, fenvalerate and cypermethrin, normally used in cotton were found to have detrimental affect on the natural population of the bug. A large population of G. ochropterus survived and flourished on relay crops like maize and sunnhemp and was able to shift to cotton crop which was sown early. The predator appeared to exhibit habitat preference. In nature the predator occurred in the first fortnight of September during 1994-95 and in the second fortnight of August during 1995-96. The predator population reached its peak during the first fortnight of December. The activity of G. ochropterus was found negatively correlated with relative humidity. They remained active until the crop was removed. Off season survival of the predator was recorded on crops ajid weeds like ratoon cotton, maize, sunnhemp, mungbean, okra, brinjal, potato, summer groundnut, cowpea, Chenopodium album and Gyanandropsis spp. Greater population was observed on ratoon cotton, maize, sunnhemp, okra, brinjal, cowpea and lucerne. Developing effective mass rearing techniques and efficient relay cropping system and other methods to conserve the predator in nature are suggested.