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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: Nematology × Author: Patel, Ashokkumar D. × Start date: 1998 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    INVESTIGATIONS ON ROOT-KNOT NEMATODES (Meloidogyne incognita AND M. javanica pt. 1) IN BANANA (Musa paradisiaca L.)
    (AAU, Anand, 1998) Patel, Ashokkumar D.; Patel, D. J.
    studies pertaining to the effect of root-knot nematodes (RKN), Meloidogyne incognita and M. javanica pt. 1 in banana cv. Basrai with respect to i, pathogenicity of Meloidogyne incognita and M. javanica pt. 1 on banana to determine economic threshold levels; ii, effect of M. incognita and M. javanica pt.l infection on nutrients uptake by banana; iii, biochemical changes broughtout by M. incognita and M. javanica pt.l infection in banana, iv, histopathological and cytological changes due to M. incognita and M. javanica pt.l infection in banana, v, effect on meteorological parameters viz. leaf temperature, diffusion resistance and transpiration rate due to M. incognita and M. javanica pt.l infection in banana, vi, effect of aqueous leaf extracts of various botanicals on egg hatching and larval penetration of M. incognita and M. javanica pt.l in banana and vii, effect of different oil cakes extracts on egg hatching and larval penetration of M. incognita and M. javanica pt.1 in banana were carried out during 1994-95 and 1995-96. The salient findings are : i. An inoculum levels of 10,000 J/plant of M. incognita and 50,000 J2/plant of M. javanica pt.1 proved detrimental to the growth and development of banana cv. Basrai. The root and soil nematode populations were increased but nematode reproduction rate decreased with an increase in the inoculum levels of both the nematode species. ii. The uptake of various nutrients viz. N, P, K, Ca, Mg and S by banana cv. Basrai roots decreased with an increase in inoculum levels of M. incognita and M. javanica pt.1. However, significant reduction in uptake of nutrients was recorded at 10,000 & 50,000 and above J2/plant of M. incognita and M. javanica pt.1 respectively. iii. There was an increase in peroxidase and polyphenol oxidase activities and total phenol contents with an increase in inoculum levels of M. incognita and M. javanica pt.1 the maximum being in the level of 1,00,000 J2/plant. iv. Histopathological and cytological studies indicated that the second stage larvae of both M. incognita and M. javanica pt.1 after invasion migrated inter and intra cellularly, finally anchored near vascular tissues. Hypertrophy and hyperplasia and giant cell formation were common for both the species of Meloidogyne. The root galls produced by M. incognita were larger in size than that of M. javanica pt.l. All nematode stages were noticed in banana roots. V. There was an increase in leaf temperature and transpiration rate with decrease in diffusion resistance with an increase in inoculum levels of M. incognita and M.javanica pt.l. vi, Among various botanicals tested for their effects on egg hatching and subsequent larval penetration of M. incognita and M. javanica pt.l in banana roots, aqueous leaf extracts of argemone & lantana and NSKS treatment proved most effective in almost complete inhibition of nematode egg hatching at 48, 96 and 144 hrs indicating ovicidal effect. Ipomea and castor leaf extracts were least effective. There was no nematode larval penetration from eggmasses previously treated with argemone & lantana leaf extracts and NSKS treatment. Significantly more nematode larval penetration was recorded from eggmasses treated with castor and ipomea leaf extracts, indicating ovistatic effect. vii. Of various methods of oil cakes extraction, n-methanol extraction showed significantly more inhibitory effect on egg hatching and siibsequent larval penetration of M. incognita and M. javanica pt.1 in banana roots over hexane and distilled water extraction methods. Among various cakes, mustard cake proved most effective in reducing egg hatching and larval penetration of both the species of Meloidogyne over castor and neem cakes.