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Home > Biodiversity of Insects Associated With Rice Oryza Sativa L. Crop Agroecosystem in the Punjab, Pakistan

Biodiversity of Insects Associated With Rice Oryza Sativa L. Crop Agroecosystem in the Punjab, Pakistan

Thesis Info

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Author

Muhammad Asghar

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2010

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/630

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725609478

Similar


In this study, factors regarding the excessive use of pesticides and those particularly involved in the cultivation of high input and low input rice crop were investigated. Farmers’ sources of Basmati rice seed acquisition and perception of pest insects’ incidence and their management practices in rice crop were also evaluated. Results indicated that the main reason for farmers’ adoption of high input rice farming was to get better yields and profit. The main sources of rice seed acquisition were the home retained, local market and seed companies. Farmers were well aware of major pest insects of rice and reported moderate incidence of rice stem borers and high incidence of rice leaffolder but little was known about natural enemies and diseases. The most common reason for excessive use of insecticides was the misconception that pesticides were necessary to increase the yield. Farmers still relied to a great extent on chemicals to control the pests in rice crop and majority of them ignored economic threshold levels (ETL) recommended for the control. But the effective and economic suppression of insect pests in rice ecosystem by the judicial use of pesticides on the basis of ETL is utmost essential. Therefore, ETLs for the chemical control of rice stem borers (Scirpophaga incertulus Wlk. & S. innotata Wlk.) and rice leaffolder (Cnaphalocrosis medinalis Gn.) in the traditional Basmati rice growing area, the Kallar tract were also determined to be 5% dead-hearts (DH) and 3% folded leaves for stem borers and rice leaffolder respectively. The use of insecticides ignoring recommended ETLs along with higher doses of fertilizers is not only the cause of economic losses but also harmful to the insect biodiversity. So the effect of high inputs (HIP) farming practices on insect communities was also investigated. The higher number of species richness and abundance were measured for low input (LIP) systems. On the other hand some insects were abundant in HIP systems because of their adaptation to such kind of habitat. The insect species richness and abundance increased with rice crop age and showed close relationship with crop. All the major trophic guilds, except non rice pest (NRP), were also in abundance for LIP systems. Some species of insect were found sensitive to agrochemical pollution and were regarded as bioindicators. The higher Shannon’s value in some cases for HIP farms suggested that agrochemicals had a significant impact in eliminating the rare species and hence increased the Shannon’s and evenness values among the species. The overall effect of HIP rice farming on insect species richness and abundance was significantly negative. The LIP systems were found having greater diversity along with supporting a good number of rare species.
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محمد عباس اثرؔ

محمد عباس اثرؔ
محمد عباس اثرؔ(۱۹۰۱ئ۔پ) کا اصل نام محمد عباس اور اثرؔ تخلص کرتے تھے۔ اثر ؔراولپنڈی میں پیدا ہوئے۔ سیالکوٹ میں بزمِ افکار کا احیا کیا اور اس بزم کے صدر بنے۔ اثر سیالکوٹ میں حلقہ اربابِ ذوق کے ممبر بھی منتخب ہوئے۔ آپ نعت‘ غزل‘ نظم اور قطعات لکھتے تھے ۔(۳۴۰) اثر روایتی شاعر ہیں۔ ان کی شاعری توحید و رسالت‘ یاسیت اور دردو غم میں ڈوبی ہوئی ہے۔ کچھ اشعارملاحظہ ہوں:
آج کچھ اور حال ہے دل کا

بجھ رہا ہے چراغ محفل کا

اک بگولہ اٹھا سرِ منزل

اڑ رہا ہے غبار منزل کا

غم کی کونپل نگاہ سے پھوٹی

کوئی ٹوٹا ہے آبلہ دل کا

آندھی اٹھی اثرؔ بڑھائو قدم

بجھ رہا ہے چراغ منزل کا
(۳۴۱)

کیا سناتے انہیں ہم حال سنایا نہ گیا

درد محسوس تو ہوتا تھا دکھایا نہ گیا

اور تو رنج کئی ہم نے اٹھائے لیکن

رنج بے مہری احباب اٹھایا نہ گیا
(۳۴)۲

شکستِ غم آرزو درد بن کر

میرے دل کو رہتا ہے اکثر لپیٹے

اثر میں نے اشعار میں ضبطِ غم سے

سلگتے ہوئے چند آنسو سمیٹے
(۳۴۳)
جب نہیں تھے بحرو بر‘ انجم زمین و آسماں
تھا فقط حسنِ ازل یعنی خدا کی ذات تھی
کائنات حسن جب پھیلی تو لا محدود تھی
اور جب سمٹی محمدؐ مصطفٰے کی ذات تھی (۳۴۴)

COMPARISON OF REGIONAL MANUAL THERAPY AND STANDARD PHYSICAL THERAPY INTERVENTION IN FEMALES WITH SACROILIAC JOINT PAIN

Background and Aim: Sacroiliac joint pain is localized in the region of sacroiliac joint which can be increased by stress and provocation tests of the joint. Aim of this study was to compare two interventions for reduction of sacroiliac joint pain. Methodology: Study design was randomized clinical trial. Study was conducted in bajwah hospital and children polyclinic Lahore. Duration of study was six months. The total sample size was 64 patients. Females of 20-50 years old with diagnosed sacroiliac joint pain were included in this study. Compression and distraction objective tests were performed for further confirmation of sacroiliac joint pain.  Purposive sampling technique was used. Numeric pain rating scale (NPRS) and Oswestry low back disability questionnaire (ODI) were used to collect the data. Exclusion criteria was females with fractures and other abnormalities of spine. Results: Results showed that both groups were equal when assessed on baseline by normality test colmogorov-smirnova. Independent t test was applied to compare the mean value of NPRS. Pretreatment mean of NPRS scale for both the regional treatment and standard treatment groups was 7.After 4 weeks NPRS of regional treatment group was 4 and of standard treatment group was 7. The mean value of pretreatment ODI for regional treatment group was 33 and for standard treatment group was 34.After 4 weeks ODI of regional treatment group was 24 and mean of standard treatment group was 27. Conclusion: It is concluded that after giving equal sessions to both groups when results were assessed regional treatment is more effective than standard treatment.

The Effect of Proparanolol on Hepatic Blood Flow in Reducing the Toxicity of Hepatotoxic Drugs Used in the Treatmetn of Chronic Diseases

Tuberculosis, diabetes and epilepsy are the diseases requiring prolonged treatment by certain drugs. Unfortunately their toxic effects sometimes decline the standards of life of the patients in terms of physical and psychological well being. Hepatic toxicity of rifampin, phenytoin, sulfonylureas and carbamazepine cannot be neglected in this regard. These drugs may reduce the efficiency of liver to a large extent. Therefore it is important to consider an adjuvant for this purpose as these drugs cannot be compromised in term of doses, dosage forms or responses. The study has been planned to see the beneficial role of altering liver blood flow in reducing the toxicity of drugs. Propranolol is a non selective beta adrenergic receptor antagonist which reduces the hepatic blood flow. It is scientific to believe that it can reduce the amount of hepatotoxic drug in liver by reducing the hepatic blood flow thereby reducing the DILI. The hepatotoxicity of these drugs with or without propranolol in term of anatomical changes, enzymatic assay, qualitative and quantitative histopathological studies and electron microscopy were evaluated. In this study significant number of healthy rabbits were used which will be divided into nine different groups from A to H. Calculated dose of all four drugs were given to the assigned groups of rabbits with or without propranolol as per dosing schedule. Group A was considered as control and received distilled water only while group B and C were received CBZ alone and in combination of propranolol, respectively. Liver function test and histological evaluation by H and E staining and scanning electron microscopy (SEM) were carried at the end of dosing by using standard procedures. Serum level of ALT, ALP, γGT and bilirubin were significantly (p<0.05) increased in CBZ treated group as compared to control while not significantly elevated in CBZ plus propranolol treated groups. But significant reduction in hepatic parameters was seen in CBZ plus propranolol vi group as compared to CBZ alone. The histopathological examination revealed various features of hepatic architecture damage in CBZ treated group. These results were also supported by micrometry and SEM. The hepatic damage induced by CBZ was successfully ameliorated by propranolol. The hepatic architecture was effectively recovered in propranolol and CBZ treated group which showed in Hand E staining and SEM. Group D and E received rifampicin (RIF) alone and in combination of propranolol respectively. Similar parameters were used to explore the hepatoxic effects of RIF and protection was given by propranolol. Results of liver function test revealed that RIF significantly elevate the serum levels of ALT, ALP, γGT and bilirubin as compared to control. These levels were also higher in RIF plus propranolol treated group but when comparing the levels in between group D and E it was illustrated that propranolol provide significant protection to the RIF induced damage. Histology and SEM of liver sections also supported these results. Liver damage induced by RIF expressed as central vein dilation, infiltration of inflammatory cells, portal vein dilation and damage of hepatocytes. Micrometry revealed that number of viable hepatocytes, their diameter and nuclear diameter were altered.SEM micrograph showed distorted and swollen hepatic cords. All of these changes successfully turned to normal by combined administration of propranolol. propranolol successfully improve the hepatic architecture proved by both qualitative and quantitative microscopy. Glibenclamide (GLB) alone or in combination of propraranolol was administered in Group F and G respectively. Serum levels of ALT, ALP, γGT and bilirubin were estimated and compared in both groups. Results showed that GLB caused significant elevation of liver functions as compared to control. There values of ALT and ALP were significantly high in vii group G as compare to control.When comparing these levels between group G and F significant elevations were seen in group F which showed that propranolol reduced the level of serum ALT, ALP, γGT and bilirubin when administered with GLB. The granuloma and necrosis seen in GLB treated liver was not seen in group G rabbit’s liver. The number of viable hepatocytes and their nuclear diameter which were considerably reduced by GLB were effectively preserved to normal after administering propranolol as adjuvant. Thus histological evaluation of liver tissue through H and E staining and SEM showed that combined administration of GLB and propranolol is helpful in reducing the GLB induced liver damage. Group H and I received phenytoin (PHT) alone and in combination with propranolol, respectively. Evaluation of hepatic functions test expressed that the serum levels of ALT, ALP, γGT and bilirubin were significantly raised in PHT treated group. Serum levels of ALT, ALP, γGT and bilirubin were also significantly high in PHT and propranolol treated group as compared to control. When comparing the values between these two groups it was illustrated that propranolol offered significant protection to the liver. Histological examination of Hand E stained liver tissue showed that PHT caused severe hepatic damage expressed as necrosis, hemorrhage and dilation of sinusoids, inflammation and dilation and congestion of portal vein. Combined administration of propranolol and PHT reduced these changes induced by PHT alone. The micrometric estimation of H and E stained section of live supported the above mentioned results.Minor inflammatory cells were seen and necrosis is absent in liver section of group I rabbits. SEM of liver of group H also showed damage and ruptured hepatic cords with cellular swelling. Protection provided by viii propranolol also expressed through this technique. Propranolol improved the hepatic architecture clearly seen in the SEM micrograph of group I rabbit. It is summarized that all of the aforementioned drugs produced threatened effect on the liver. Propranolol is an approved treatment of portal hypertension and esophageal varices in cirrhotic patient. This effect of propranolol is due to reduction in hepatic blood flow. Propranolol offered beneficial effect in drug induced hepatoxicity may be due to its diminution of portal blood flow thus reducing the supply of noxious substance to the liver. Propranolol may also ameliorate drug induced liver disease due to its affect on cytochrome P450 or due to owing antioxidant action.