{"id":70,"date":"2018-11-22T07:24:58","date_gmt":"2018-11-22T07:24:58","guid":{"rendered":"http:\/\/www.gyanvihar.org\/journals\/?p=70"},"modified":"2019-06-12T06:45:09","modified_gmt":"2019-06-12T06:45:09","slug":"allelopathic-effect-of-tephrosia-purpurea-on-parthenium-hysterophorus-l","status":"publish","type":"post","link":"https:\/\/www.gyanvihar.org\/journals\/allelopathic-effect-of-tephrosia-purpurea-on-parthenium-hysterophorus-l\/","title":{"rendered":"ALLELOPATHIC EFFECT OF TEPHROSIA PURPUREA ON PARTHENIUM HYSTEROPHORUS L."},"content":{"rendered":"

pp. 18-22<\/strong><\/p>\n

Ms. Pallavi Bhatnagar<\/u><\/span><\/strong><\/p>\n

Research Scholar, S.P.C. Govt. College, Ajmer (Raj.), India Email id- bhatnagarpallavi15@gmail.com<\/a><\/u><\/span><\/p>\n

ABSTRACT<\/span><\/h1>\n

One of the main threats to biodiversity in the world is the destruction of habitats by natural and human interference. Natural and semi natural destruction is mainly caused by invasion of alien organisms which has been recognized as one of the serious and inestimable problem because existing aliens do not disappear and sometimes continue to spread. So, they are called as pervasive threat and it is important driver of global change. Parthenium hysterophorus <\/em>L. is found to be the second most densely populated deadly and aggressive weed with allelopathic properties. This research study have been reported with common naturally occurring weeds as controlling agents for Parthenium hysterophorus, <\/em>because use of some other allelopathic weeds and plants to suppress the weed infestation is the most cost effective and environment friendly method for weed control. The current study was conducted to test the inhibitory potential of aqueous extracts of root, stem and leaves of weed species Tephrosia purpurea <\/em>on seed germination and seedling growth of Parthenium hysterophorus <\/em>L. under laboratory conditions. The leaves are most effective part of plant. The radicle was more inhibited than the plumule in petri dishes. Inhibitory effect increases with increasing aqueous extract concentration. Therefore, further investigations will be required under green house and field conditions for pragmatic recommendation of species selection in the frame of weed species mediated ecological management of Parthenium hysterophorus <\/em>L.<\/strong><\/span><\/p>\n

\u00a0Introduction<\/strong><\/span><\/p>\n

One of the main threats to biodiversity in the world is the destruction of habitats by natural and human interference. Natural and semi natural destruction is mainly caused by invasion of alien organisms which has been recognized as one of the serious and inestimable problem because existing aliens do not disappear and sometimes continue to spread. So, they are called as pervasive threat and it is important driver of global environment change. Invasive species are the growing problem for the world both ecologically and economically. In the recent years, creating competition between native and alien species has gain momentum. Numerous plants are reported to possess allelopathic potential and effort has been made to use them in weed control. Natural products release from allelopathic plants may help to reduce the use of synthetic herbicides for weed management. Parthenium hysterophorus <\/em>L. is found to be the second most densely populated deadly and aggressive weed, which is attributed to its allelopathic properties. The present study is the observation that Parthenium hysterophorus <\/em>L. plants are very scanty from fields infested with some other allelopathic weeds and utilizing allelopathic plants to suppress the weed infestation is the most cost effective and environment friendly method of weed control.<\/span><\/p>\n

Tephrosia purpurea, <\/em>commonly known as Sarpunkha, belongs to family Fabaceae. It is common wasteland weed which is native to Indian sub continent and China and is found throughout India and Sri Lanka. In this plant, flowering and fruiting occur in October to December. It has allelopathic properties, so spread vigorously and covers large area. Therefore, an allelopathic approach has been tried under this investigation for controlling Parthenium hysterophorus <\/em>L. Because, use of some other allelopathic weeds and plants to suppress the weed infestation is the most cost effective and environment friendly method for weed control.<\/span><\/p>\n

Material and Methodology<\/span><\/h1>\n

Aqueous extracts of leaves, stem and root of\u00a0<\/span>Tephrosia pupurea <\/em>were obtained by soaking 25 g fresh plant material in 100 ml water for 3 days, 5 days, 7 days, 9 days and 11 days at room temperature. Extract were filtered and stored in refrigerator. Seeds of Parthenium hysterophorus <\/em>L. were sown on twice folded filter paper seed beds in sterilized petri dishes. Filter papers were moistened with aqueous extracts of root, stem and leaves of different concentrations while control received in water. There were\u00a0<\/span>15 \u00a0seeds \u00a0in \u00a0each \u00a0plate. \u00a0Petri \u00a0plates \u00a0were\u00a0<\/span>incubated for 3DAS, 5DAS, 7DAS, 9DAS, 11DAS,\u00a0 \u00a013DAS,\u00a0 \u00a015DAS,\u00a0 \u00a017DAS\u00a0 \u00a0and\u00a0<\/span>19DAS. At each above mentioned time, number of seed germinated and their root\u00a0<\/span>and shoot length was recorded.<\/span><\/p>\n

Observation:<\/span><\/h1>\n

Tephrosia purpurea <\/em><\/strong>(Root Extract) <\/strong><\/span><\/p>\n

TABLE 1: Number of seed germinated<\/strong><\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
E<\/strong>xtract<\/strong><\/span><\/td>\n <\/p>\n

3DE<\/strong><\/span><\/td>\n

 <\/p>\n

5DE<\/strong><\/span><\/td>\n

 <\/p>\n

7DE<\/strong><\/span><\/td>\n

 <\/p>\n

9DE<\/strong><\/span><\/td>\n

 <\/p>\n

11DE<\/strong><\/span><\/td>\n<\/tr>\n

\n

D<\/strong>ay after sowing<\/strong><\/span><\/p>\n<\/td>\n<\/tr>\n

3DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\n1<\/span><\/td>\n8<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n<\/tr>\n
5DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\n1<\/span><\/td>\n8<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n<\/tr>\n
7DAS<\/strong><\/span><\/td>\n7<\/span><\/td>\n4<\/span><\/td>\n8<\/span><\/td>\nnil<\/span><\/td>\n1<\/span><\/td>\n<\/tr>\n
9DAS<\/strong><\/span><\/td>\n7<\/span><\/td>\n4(d)<\/span><\/td>\n8(d)<\/span><\/td>\nnil<\/span><\/td>\n1<\/span><\/td>\n<\/tr>\n
11DAS<\/strong><\/span><\/td>\n7<\/span><\/td>\n9(4d)<\/span><\/td>\n8(d)<\/span><\/td>\nnil<\/span><\/td>\n2<\/span><\/td>\n<\/tr>\n
13DAS<\/strong><\/span><\/td>\n7(d)<\/span><\/td>\n9(4d)<\/span><\/td>\n9(d)<\/span><\/td>\nnil<\/span><\/td>\n2<\/span><\/td>\n<\/tr>\n
15DAS<\/strong><\/span><\/td>\n7(d)<\/span><\/td>\n9(4d)<\/span><\/td>\n9(d)<\/span><\/td>\nnil<\/span><\/td>\n2(rd)<\/span><\/td>\n<\/tr>\n
17DAS<\/strong><\/span><\/td>\n7(d)<\/span><\/td>\n9(d)<\/span><\/td>\n9(d)<\/span><\/td>\nnil<\/span><\/td>\n2(1d+1e)<\/span><\/td>\n<\/tr>\n
19DAS<\/strong><\/span><\/td>\n7(d)<\/span><\/td>\n9(d)<\/span><\/td>\n9(d)<\/span><\/td>\nnil<\/span><\/td>\n2(d)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

TABLE 2: Seedling growth (Length of Root and Shoot)<\/span><\/h1>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Extracts<\/strong><\/td>\n <\/p>\n

3DE<\/strong><\/td>\n

 <\/p>\n

 <\/p>\n

5DE<\/strong><\/td>\n

 <\/p>\n

7DE<\/strong><\/td>\n

9DE<\/strong><\/td>\n11DE<\/strong><\/td>\n<\/tr>\n
Day After showing<\/strong><\/td>\nRL\u00a0\u00a0\u00a0 <\/strong><\/td>\nSL<\/td>\nRL\u00a0\u00a0\u00a0 <\/strong><\/td>\nSL<\/td>\nRL\u00a0\u00a0\u00a0 <\/strong><\/td>\nSL<\/td>\nRL\u00a0\u00a0\u00a0 <\/strong><\/td>\nSL<\/td>\nRL\u00a0\u00a0\u00a0 <\/strong><\/td>\nSL<\/td>\n<\/tr>\n
3DAS<\/strong><\/td>\nnil<\/td>\nnil<\/td>\n0.8<\/td>\nnil<\/td>\n2.312<\/td>\n1.487<\/td>\nnil<\/td>\nnil<\/td>\nnil<\/td>\n\u00a0\u00a0\u00a0\u00a0 nil<\/td>\n<\/tr>\n
5DAS<\/strong><\/td>\nnil<\/td>\nnil<\/td>\n1.5<\/td>\n0.8<\/td>\n2.225<\/td>\n1.490<\/td>\nnil<\/td>\nnil<\/td>\nnil<\/td>\nnil<\/td>\n<\/tr>\n
7DAS<\/strong><\/td>\n1.91<\/td>\n0.9<\/td>\n1.45<\/td>\n0.675<\/td>\n2.186<\/td>\n1.378<\/td>\nnil<\/td>\nnil<\/td>\n2.5<\/td>\n1.2<\/td>\n<\/tr>\n
9DAS<\/strong><\/td>\n2.08<\/td>\n1.0<\/td>\n1.45<\/td>\n1.5<\/td>\n2.186<\/td>\n1.362<\/td>\nnil<\/td>\nnil<\/td>\n2.42<\/td>\n1.45<\/td>\n<\/tr>\n
11DAS<\/strong><\/td>\n2.15<\/td>\n1.0<\/td>\n1.366<\/td>\n1.044<\/td>\n2.137<\/td>\n1.362<\/td>\nnil<\/td>\nnil<\/td>\n2.34<\/td>\n1.67<\/td>\n<\/tr>\n
13DAS<\/strong><\/td>\ndry<\/td>\ndry<\/td>\n1.522<\/td>\n1.433<\/td>\ndry<\/td>\ndry<\/td>\nnil<\/td>\nnil<\/td>\n2.25<\/td>\n1.8<\/td>\n<\/tr>\n
15DAS<\/strong><\/td>\ndry<\/td>\ndry<\/td>\n1.522<\/td>\n1.433<\/td>\ndry<\/td>\ndry<\/td>\nnil<\/td>\nnil<\/td>\n2.25<\/td>\n1.9<\/td>\n<\/tr>\n
17DAS<\/strong><\/td>\ndry<\/td>\ndry<\/td>\n1.477<\/td>\n1.522<\/td>\ndry<\/td>\ndry<\/td>\nnil<\/td>\nnil<\/td>\n2.35<\/td>\n1.9<\/td>\n<\/tr>\n
19DAS<\/strong><\/td>\ndry<\/td>\ndry<\/td>\nDry<\/td>\ndry<\/td>\ndry<\/td>\ndry<\/td>\nnil<\/td>\nnil<\/td>\n2.35<\/td>\n1.8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tephrosia purpurea <\/em><\/strong>(Stem Extract) TABLE 1: Number of seed germinated<\/strong><\/span><\/p>\n

TABLE 2: Seedling growth (Length of Root and Shoot)<\/span><\/h1>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
E<\/strong>xtract<\/strong><\/span><\/td>\n3DE<\/strong><\/span><\/td>\n <\/p>\n

5DE<\/strong><\/span><\/td>\n

 <\/p>\n

7DE<\/strong><\/span><\/td>\n

 <\/p>\n

9DE<\/strong><\/span><\/td>\n

 <\/p>\n

11DE<\/strong><\/span><\/td>\n

<\/td>\n<\/tr>\n
D<\/strong>ay after sowing<\/strong><\/span><\/td>\n<\/tr>\n
 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

<\/td>\n<\/tr>\n
3DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.88<\/span><\/td>\n1.34<\/span><\/td>\n1.24<\/span><\/td>\n0.8<\/span><\/td>\n0.8<\/span><\/td>\nnil<\/span><\/td>\n<\/td>\n<\/tr>\n
5DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.85<\/span><\/td>\n1.86<\/span><\/td>\n1.36<\/span><\/td>\n1.15<\/span><\/td>\n0.6<\/span><\/td>\n0.8<\/span><\/td>\n<\/td>\n<\/tr>\n
7DAS<\/strong><\/span><\/td>\n1.35<\/span><\/td>\n0.2<\/span><\/td>\n1.6<\/span><\/td>\n0.2<\/span><\/td>\n1.86<\/span><\/td>\n2.0<\/span><\/td>\n1.4<\/span><\/td>\n1.67<\/span><\/td>\n0.8<\/span><\/td>\n1.0<\/span><\/td>\n<\/td>\n<\/tr>\n
9DAS<\/strong><\/span><\/td>\n1.24<\/span><\/td>\n0.8<\/span><\/td>\n1.9<\/span><\/td>\n0.45<\/span><\/td>\n1.866<\/span><\/td>\n2.0<\/span><\/td>\n1.427<\/span><\/td>\n1.872<\/span><\/td>\n1.2<\/span><\/td>\n1.34<\/span><\/td>\n<\/td>\n<\/tr>\n
11DAS<\/strong><\/span><\/td>\n1.066<\/span><\/td>\n1.4<\/span><\/td>\n1.7<\/span><\/td>\n0.9<\/span><\/td>\n1.866<\/span><\/td>\n2.433<\/span><\/td>\n1.681<\/span><\/td>\n1.781<\/span><\/td>\n1.4<\/span><\/td>\n1.68<\/span><\/td>\n<\/td>\n<\/tr>\n
13DAS<\/strong><\/span><\/td>\n1.2<\/span><\/td>\n<\/td>\n0.95<\/span><\/td>\n0.75<\/span><\/td>\n1.9<\/span><\/td>\n2.433<\/span><\/td>\n1.6<\/span><\/td>\ndry<\/span><\/td>\n1.7<\/span><\/td>\n1.5<\/span><\/td>\n<\/td>\n<\/tr>\n
15DAS<\/strong><\/span><\/td>\n1.6<\/span><\/td>\n1.58<\/span><\/td>\n1.05<\/span><\/td>\n1.05<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1.7<\/span><\/td>\nnil<\/span><\/td>\n<\/td>\n<\/tr>\n
17DAS<\/strong><\/span><\/td>\n1.58<\/span><\/td>\n1.66<\/span><\/td>\n1.266<\/span><\/td>\n0.7<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1. 24<\/span><\/td>\n0.86<\/span><\/td>\n<\/td>\n<\/tr>\n
19DAS<\/strong><\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n0.8<\/span><\/td>\n1.1<\/span><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tephrosia purpurea <\/em><\/strong>(Leaves Extract) TABLE 1: Number of seed germinated<\/strong><\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
E<\/strong>xtract<\/strong><\/span><\/td>\n <\/p>\n

3DE<\/strong><\/span><\/td>\n

 <\/p>\n

5DE<\/strong><\/span><\/td>\n

 <\/p>\n

7DE<\/strong><\/span><\/td>\n

 <\/p>\n

9DE<\/strong><\/span><\/td>\n

 <\/p>\n

11DE<\/strong><\/span><\/td>\n<\/tr>\n

D<\/strong>ay after sowing<\/strong><\/span><\/td>\n<\/tr>\n
3DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n10<\/span><\/td>\n9<\/span><\/td>\nnil<\/span><\/td>\n<\/tr>\n
5DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n10<\/span><\/td>\n10(8d)<\/span><\/td>\n1<\/span><\/td>\n<\/tr>\n
7DAS<\/strong><\/span><\/td>\n1<\/span><\/td>\nnil<\/span><\/td>\n10<\/span><\/td>\n10 (8d)<\/span><\/td>\n2<\/span><\/td>\n<\/tr>\n
9DAS<\/strong><\/span><\/td>\n3(1rd)<\/span><\/td>\nnil<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n2<\/span><\/td>\n<\/tr>\n
11DAS<\/strong><\/span><\/td>\n3(1rd)<\/span><\/td>\nnil<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n2(1rd)<\/span><\/td>\n<\/tr>\n
13DAS<\/strong><\/span><\/td>\n3(1rd)<\/span><\/td>\nnil<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n2(1d)<\/span><\/td>\n<\/tr>\n
15DAS<\/strong><\/span><\/td>\n3(1rd)<\/span><\/td>\nnil<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n2(d)<\/span><\/td>\n<\/tr>\n
17DAS<\/strong><\/span><\/td>\n4(2d)<\/span><\/td>\n1(d)<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n3(2d)<\/span><\/td>\n<\/tr>\n
19DAS<\/strong><\/span><\/td>\n4(2d+1rd)<\/span><\/td>\n2(d)<\/span><\/td>\n10(d)<\/span><\/td>\n10(d)<\/span><\/td>\n3(2d+1e)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

TABLE 2: Seedling growth (Length of Root and Shoot)<\/span><\/h1>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
E<\/strong>xtract<\/strong><\/span><\/td>\n3DE<\/strong><\/span><\/td>\n <\/p>\n

5DE<\/strong><\/span><\/td>\n

 <\/p>\n

7DE<\/strong><\/span><\/td>\n

 <\/p>\n

9DE<\/strong><\/span><\/td>\n

 <\/p>\n

11DE<\/strong><\/span><\/td>\n

<\/td>\n<\/tr>\n
D<\/strong>ay after sowing<\/strong><\/span><\/td>\n<\/tr>\n
 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

 <\/p>\n

 <\/p>\n

R<\/strong>L\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SL<\/strong><\/span><\/td>\n

<\/td>\n<\/tr>\n
3DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.24<\/span><\/td>\n0.6<\/span><\/td>\n0.8<\/span><\/td>\n0.4<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n<\/td>\n<\/tr>\n
5DAS<\/strong><\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.36<\/span><\/td>\n1.0<\/span><\/td>\n1.38<\/span><\/td>\n0.6<\/span><\/td>\n0.4<\/span><\/td>\nnil<\/span><\/td>\n<\/td>\n<\/tr>\n
7DAS<\/strong><\/span><\/td>\n2.2<\/span><\/td>\n1.2<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.39<\/span><\/td>\n1.34<\/span><\/td>\n1.86<\/span><\/td>\n0.84<\/span><\/td>\n1.55<\/span><\/td>\n1.5<\/span><\/td>\n<\/td>\n<\/tr>\n
9DAS<\/strong><\/span><\/td>\n1.96<\/span><\/td>\n1.65<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.42<\/span><\/td>\n1.56<\/span><\/td>\n2.07<\/span><\/td>\n1.06<\/span><\/td>\n1.55<\/span><\/td>\n1.54<\/span><\/td>\n<\/td>\n<\/tr>\n
11DAS<\/strong><\/span><\/td>\n1.666<\/span><\/td>\n1.833<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\n1.49<\/span><\/td>\n1.83<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1.55<\/span><\/td>\n1.56<\/span><\/td>\n<\/td>\n<\/tr>\n
13DAS<\/strong><\/span><\/td>\n2.0<\/span><\/td>\n1.98<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1.55<\/span><\/td>\n1.6<\/span><\/td>\n<\/td>\n<\/tr>\n
15DAS<\/strong><\/span><\/td>\n2.133<\/span><\/td>\n2.1<\/span><\/td>\nnil<\/span><\/td>\nnil<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1.45<\/span><\/td>\n1.6<\/span><\/td>\n<\/td>\n<\/tr>\n
17DAS<\/strong><\/span><\/td>\n1.85<\/span><\/td>\n2.23<\/span><\/td>\n1.3<\/span><\/td>\n0.7<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n0.8<\/span><\/td>\n0.89<\/span><\/td>\n<\/td>\n<\/tr>\n
19DAS<\/strong><\/span><\/td>\n2<\/span><\/td>\n2.25<\/span><\/td>\n1.45<\/span><\/td>\n0.95<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\ndry<\/span><\/td>\n1.6<\/span><\/td>\n1.66<\/span><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Result and Discussion<\/strong><\/span><\/p>\n

From the present study this species provided a strong reduction on germination and early seedling growth of\u00a0Parthenium<\/em> hysterophorus <\/em>L.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 under\u00a0\u00a0 laboratory conditions in petri dishes. Inhibitory effects increased \u00a0with \u00a0increasing \u00a0aqueous \u00a0extract concentration \u00a0of \u00a0leaves, \u00a0stem \u00a0and \u00a0root. Parthenium \u00a0hysterophorus \u00a0<\/em>L. \u00a0radicle \u00a0was more inhibited than plumule in petri dishes. Evidence showed that these plant release a diversity of allelochemicals into the environment,\u00a0 which released by volatilization, \u00a0root \u00a0exudation, \u00a0death \u00a0and decay of plants and lecheates from living and decaying residues. These allelochemicals exhibit inhibitory responses on various morpho-physiological functions of receiver plants and such responses being observed to be dose dependent. There concentrations required for control of weeds on a field scale are impracticably higher. Therefore, further investigations will be required under green house and field conditions for pragmatic recommendation of species selection in the frame of weed species mediated ecological management of Parthenium hysterophorus <\/em>L.<\/span><\/p>\n

Conclusion<\/span><\/strong><\/p>\n

Increasing attention has been given to the role and potential of allelopathy as a management strategy for conservation of biodiversity against weeds. There is a great demand for compounds with selective toxicity that can be readily degraded by either the plant and by the soil micro organisms and provide new strategies for maintaining and\u00a0 increasing\u00a0 biodiversity\u00a0 in future.<\/span><\/p>\n

Reference<\/span><\/h1>\n
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  • Javaid, ; Shafique, S. ; Bajwa, R. and Shafique, S. (2006). Effect of aqueous extract of allelopathic crops on germination and growth of Parthenium hysterophorus <\/em>L. South African Journal of Botany, 72(4): 609-612.<\/span><\/li>\n
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    • Knox Jai,Jaggi Disha and Paul S. (2010)Allelopathic effect of selected weeds on Biological Activity of Parthenium hysterophorus <\/em>. Current Research Journal of Biological Sciences 2(4): 238-240.<\/span><\/li>\n
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      • Paudel Vivek Ranjan (2009). Parthenium hysterophorus <\/em> a noxious invasive weed. Botanica Orientalis -Journal of Plant Sciences 6:85-92.<\/span><\/li>\n
      • Proceeding of National Academy of Sciences, India Section B: Biological Sciences September Alien Plant invasions in India: Current Status and Management Challenges. Zafar A. Reshi, Anzar A. khuroo.<\/span><\/li>\n
      • Shafique, ; Bajwa, R.; Javaid, A.; Shafique, S. (2005). Biological Control of Parthenium iv: Suppressive\u00a0 ability\u00a0 of aqueous leaf extracts of some allelopathic trees against germination and early seedling growth of Parthenium hysterophorus <\/em>L. Pakistan Journal of Weed Sciences and Research 11(1-2): 75-79.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

        pp. 18-22 Ms. Pallavi Bhatnagar Research Scholar, S.P.C. Govt. College, Ajmer (Raj.), India Email id- bhatnagarpallavi15@gmail.com ABSTRACT One of the main threats to biodiversity in the world is the destruction of habitats by natural and human interference. Natural and semi natural destruction is mainly caused by invasion of alien organisms which has been recognized as […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,19],"tags":[],"class_list":["post-70","post","type-post","status-publish","format-standard","hentry","category-journal-of-environment-science-and-technology","category-vol-4-issue-2-journal-of-environment-science-and-technology"],"yoast_head":"\nresearch journal - Research Journal<\/title>\n<meta name=\"description\" content=\"This research study have been reported with common naturally occurring weeds as controlling agents for Parthenium hysterophorus. 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