Akhtar, Khalid P.
(Nuclear Institute for Agriculture and Biology)
,
Haq, M.A.
(Nuclear Institute for Agriculture and Biology)
,
Ishaque, Wajid
(Nuclear Institute for Agriculture and Biology)
,
Khan, M.K.R.
(Nuclear Institute for Agriculture and Biology)
,
Khan, Azeem I.
(Nuclear Institute for Agriculture and Biology)
The effect of cotton leaf mosaic disease on morphology, yield and fibre characteristics was examined for a susceptible cotton candidate variety CRIS-168. Plants inoculated at most susceptible growth stage (six week) under screen house showed severe mosaic symptoms. There was a significant reduction ...
The effect of cotton leaf mosaic disease on morphology, yield and fibre characteristics was examined for a susceptible cotton candidate variety CRIS-168. Plants inoculated at most susceptible growth stage (six week) under screen house showed severe mosaic symptoms. There was a significant reduction in plant height and yield. Cotton leaf mosaic disease was found to produce severe effects on plant morphology with 24.1% reduction in plant height, 25% in internode length and 37.5% in number of sympodia on main stem. However no changes were observed against number of monopodial branches per plant. Inoculated plants showed 82% decrease in yield/plant, 80% in number of boll set/ plant, 12.1% in boll weight, 12.8% in lint weight, 10.8% in seed weight, and 6.8% in seed index. Cotton leaf mosaic disease also showed effects on fibre characteristics with 0.8% decrease in GOT and 1.6% in fibre length. In contrast, uniformity ratio, fibre fineness and maturity index was increased by 20.5%, 14.4% and 0.9%, respectively.
The effect of cotton leaf mosaic disease on morphology, yield and fibre characteristics was examined for a susceptible cotton candidate variety CRIS-168. Plants inoculated at most susceptible growth stage (six week) under screen house showed severe mosaic symptoms. There was a significant reduction in plant height and yield. Cotton leaf mosaic disease was found to produce severe effects on plant morphology with 24.1% reduction in plant height, 25% in internode length and 37.5% in number of sympodia on main stem. However no changes were observed against number of monopodial branches per plant. Inoculated plants showed 82% decrease in yield/plant, 80% in number of boll set/ plant, 12.1% in boll weight, 12.8% in lint weight, 10.8% in seed weight, and 6.8% in seed index. Cotton leaf mosaic disease also showed effects on fibre characteristics with 0.8% decrease in GOT and 1.6% in fibre length. In contrast, uniformity ratio, fibre fineness and maturity index was increased by 20.5%, 14.4% and 0.9%, respectively.
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문제 정의
In Pakistan, cotton leaf mosaic is still considered to be a minor problem and extent of yield losses caused by this disease has not been established. This paper reports the first studies of cotton leaf mosaic disease effect on the morphology, yield and fibre quality of susceptible cotton variety CRIS-168.
제안 방법
Individual boll weights were summed, giving the total weight of mature bolls by each sample. Average boll weight was determined for each treatment (healthy and inoculated plant) by calculating the average of mature boll weight for all plapts in a treatment. Using the mature boll weight vahies and the average boll weights of immature bolls remaining on the plants at the end of the experiment, and assuming that all green bolls matured and contributed to the yield, a maximum harvest able yield (MHY) was estimated for each plant with the equation: MYH=MBW+(ABW x GB), where MBW is mature boll weight, ABW is average boll weiSecond most important aspect of the current study was to assess the effects of cotton leaf mosaic disease on die fibre characteristics. Cotton leaf mosaic caused minor reduction in the GOT and fibre length.
After seven days tubes were removed and plants were monitored daily for symptom development. The data collected included grafting success, disease transmission, latent period (total time taken for first symptom appearance after grafting) and average disease severity 70 days post-grafting, using the disease rating scale as described by Bink (1973) given in Table 1.
이론/모형
Fibre length and uniformity ratio was measured by high volume instrumentation (HVI 900), while fibre fineness and maturity index with the help of Sheffield micronaire instrument, according to standard test methods (ASTM 1997).
성능/효과
, 2003; Nelson, 1998). This study has revealed significant reduction in above ground yield components, which suggests that cotton leaf mosaic can be a very serious disease and may cause substantial losses. Present investigations give an idea that cotton breeders, who are actively engaged in evolving resistant varieties against CLCuX may also consider this disease and adopt suitable strategies to tackle the problems of cotton leaf curl virus and cotton mosaic at the same time.
참고문헌 (15)
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