Thumbnail Image

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.

Browse

19951
Reset filters
Author: Patel, Dasharathbhai Bhagabhai × Start date: 1990 × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON RENIFORM NEMATODE, Rotylenchulus reniformis LINFORD AND OLIVEIRA, 1940, ON CASTOR
    (AAU, Anand, 1995) Patel, Dasharathbhai Bhagabhai; PATEL, D. J.
    Studies pertaining to the effects of reniform nematode, R. reniformis. on castor cvs. GAUCH 1 and GCH 4 with respect to i, interaction between R. reniformis and Fusarium oxyspoum f. ricini on castor cv. GAUCH 1 and GCH 4; ii, interaction between R. reniformis and Macrophomina phaseolina on castor cv. GCH 4; iii, assessment of quantitative and qualitative losses due to R. reniformis in castor cv. GCH 4 and iv, determination of susceptible crop stage for R. reniformis infectin on castor were carried out during 1992-93 and 1993-94. The salient findings are : A. i, Study on interaction between R. reniformis (N) and F. oxysporum f. ricini (Fo) on castor cv. GAUCH 1 indicated that plant height was significantly reduced in N - Fo treatment, whereas fresh shoot and root weight of plant were minimum in N + Fo treatment followed by N - Fo and Fo - N treatments. The treatment of N alone produced maximum (469 times) reproduction rate as compared to other treatments. ii, Wilt disease appeared three weeks earlier in different combinations of N and Fo than Fo alone. Among the combinations, N inoculated 4 wksprior to Fo inoculation (N - Fo) proved highly detrimental inducing 66.6 % wilt disease in castor cv. GAUCH 1. B. i, Experiment on interaction between R. reniformis and F. oxysporum f. ricini on castor cv. GCH 4 indicated that plant height, fresh shoot and root weights were significantly less in N alone treatment followed by N + Fo and N - Fo treatments. This treatment also produced maximum nematodes population build up/plant and had higher reproduction rate of 523 times as well over other treatments. ii, Castor wilt disease incited by F. oxvsporum f. ricini was not' observed in the treatment of Fo alone, because of resistance against wilt disease in castor cv. GCH 4. However, wilt disease appeared in the plants inoculated with nematodes 4 wks prior to fungus inoculated (N - Fo) and inoculation of both the pathogens together (N + Fo). This indicated that nematode played a vital role to break down the wilt resistance nature of castor cv. GCH 4. C. i, Study on interaction between R. reniformis and M. phaseolina on castor cv. GCH 4 indicated that the plant height and fresh root weight were significantly reduced in the treatment of N+Mp followed by N-Mp, Mp-N, N alone and Mp alone treatments. With regards to fresh shoot weight, significantly less fresh shoot weight was observed in the treatment of N alone followed by N+Mp and N-Mp treatments. The treatment of N alone produced maximum nematode population build up/plant and had higher reproduction rate of 528 times over other treatments. ii, The root-rot disease appeared earlier in different combinations of N and Mp over Mp alone. The maximum plant mortality of 41.7 % was recorded in the treatment of plants inoculated with nematode and fungus concomitantly (N + Mp) over other treatments. D. i. Experiment on assessment of quantitative and qualitative losses indicated significant reduction in plant height, fresh shoot and root weights due to R. reniformis inoculation over control treatment. ii, Seed yield and test weight of castor seed reduced significantly at 1000 and 500 inoculum levels/kg soil over control. Nematode inoculated plants (both levels) had 20.08 % reduced yields over uninoculated plants. Nematode inoculation also affected the oil content of castor seeds. There were 3.14 and 6.60 % reduction in oil contents of castor seeds due to nematodes infection at 500 and 1000 J4/kg soil respectively. iii,Chlorophyll content was also significantly reduced due to nematode inoculations. iv, Observations recorded on meteorological parameters revealed that nematodes infected plants had the 35.2 and 57.0 % reduction in diffusion resistance and 52.3 and 42.0 % increased in transpiration rate at the inoculum level of 500 and 1000 J4/kg soil respectively over control. E. Determination of susceptible crop stage of castor cv. GCH 4 to R. reniformis infection indicated that maximum nematode females penetration was recorded on 150 days old plants followed by 135 days old plants. Penetration of nematode females in castor roots progressively increased with an increase in plant age, indicating positive correlation between nematode infection and plant age.