Home > Potential of Microbial Insecticides and Diatomaceous Earth Against Three Coleopterous Insect Pests of Stored Grains under Different Abiotic Conditions
Potential of Microbial Insecticides and Diatomaceous Earth Against Three Coleopterous Insect Pests of Stored Grains under Different Abiotic Conditions
Sitophilus granarius (L.), Rhyzopertha dominica (F.) and Oryzaephilus surinamensis (L.) are the damaging insect pests of cereals and their commodities and are able to cause significant losses. Current research was performed to evaluate the lethal and progeny inhibition effect of microbial-based insecticides i.e entomopathogenic fungi (EPF) Metarhizium anisopliae and Beauveria bassiana as well as bacterial based insecticides (spinetoram and abamectin) solitary andwith combination of two formulations of diatomaceous-earth (DE) against S. granarius, O. surinamensis and R. dominica. Three concentrations (1x108, 1.5x108 and 2x108 spores/kg grain) of each EPF were used while for bacterial based insecticides concentrations were 0.5, 1.0 and 1.5ppm. Similarly, for diatomaceous earth, three different doses (200, 400 and 800 ppm) of every formulation were applied. Completely Randomized Design (CRD) was used with three repetitions of all treatments. Mortality of test insects was recorded after 7, 14 and 21 days while after 60 days for post-treatment progeny build up. Each bioassay was performed at three levels of temperature (25°, 30° and 35°C) and relative humidity (r.h.; 45, 60 and 75%). Collected statistics were examined with applicable statistical methods using R-Software.The data analyses had shown diversified results regarding test insect susceptibility at different abiotic conditions. In case of Bacterial based insecticides, the response of treatment remained best at high temperature and low r.h. for all test insects. Complete control was achieved after 14 days for S. granarius and R. dominica while for O. surinamensis 100% mortality was not attained even after 21-d of exposure period. Progeny production was remained totally suppressed for S. granarius and R. dominica while in case of O. surinamensis there was significant reproduction at some abiotic conditions with maximum production at temperature of 30°C with 75% r.h. The response of-D.E against test insects was also effective and the most vulnerable species was O. surinamensis followed by S. granarius and R. dominica. It was observed that high temperature, low r.h. levels, higher dosages and long exposure periods increased the efficacy of DEs. Regarding progeny production, low temperature and high humidity remained most favourable for progeny emergence in DE-treated grains. The effects of EPF remained somewhat similar to the response of DE but overall mortality was low. Among tested species of insects R. dominica remained most susceptible to the application of EPF followed by O. surinamensis and S. granarius. The best abiotic condition for B. bassiana was low temperature (25°C) and moderate (60%) humidity while for M. anisopliae moderate temperature (30°C) and moderate (60%) humidity remained suitable at which maximum response was attained. Long exposure intervals and higher dose rates increased the mortality in each case. In the case of progeny development, the emergence of offspring was suppressed at moderate and low temperature for M. anisopliae and B. bassiana respectively with moderate r.h. When DE was applied in combination with the microbial insecticides, a synergistic effect was noticed in all combinations and R. dominica and S. granarius remained more susceptible as compared to O. surinamensis. The response of abiotic condition was significant for combination of DE and EPF while for DE and bacterial based insecticide it was non-significant. The results of the study divulge that all applied microbial based insecticides and DE are very effective for the control of these test insects and different abiotic conditions are responsible for affecting their efficacy. Furthermore, the combinations of these microbial insecticides with DE have a synergistic response against test insects. This study also recommends that attention should be paid to the interaction of abiotic factors with the efficacy of DE and microbial insecticides before planning IPM strategy for stored grain insect pests.
آہ جناب خالد مسعود!! یہ خبر علمی و دینی خصوصاً ترجمان القرآن مولانا حمید الدین فراہیؒ کے قدردانوں اور ان کے علوم و افکار کے شیدائیوں کے لیے بڑی غم ناک اور روح فرسا ہے کہ یکم اکتوبر ۲۰۰۳ء کو رسالہ تدبر لاہور کے مدیر جناب خالد مسعود صاحب کا انتقال ہوگیا، اناﷲ وانا الیہ راجعون۔ وہ مولانا امین احسن اصلاحی کے شاگرد رشید اور علمی وارث و جانشین تھے، انہوں نے اپنی زندگی فکر فراہی کی شرح و ترجمانی اور اس کی ترویج و اشاعت کے لیے وقف کردی تھی، ان کی وفات سے ہم قرآن و حدیث کے ایک بڑے خدمت گزار سے محروم ہوگئے۔ مرحوم کو جگر کی بیماری تھی، خون کی رگ بار بار پھٹ جاتی تھی اور خون کی قے ہونے لگتی تھی، آخر اس بیماری نے ان کا کام تمام کردیا۔ خالد مسعود صاحب ضلع جہلم کے ایک گاؤں ’’ﷲ‘‘ ۱۶؍ دسمبر ۱۹۳۵ء کو پیدا ہوئے، یہیں ابتدائی تعلیم حاصل کی اور ۱۹۵۱ء میں نوشہرہ سے فرسٹ ڈویژن میں میٹرک اور ۱۹۵۵ء میں اسلامیہ کالج لاہور سے فرسٹ ڈویژن میں بی۔ایس۔سی کیا، ۱۹۵۷ء میں پنجاب یونیورسٹی سے کیمسٹری میں ایم۔ایس۔سی کیا، ۱۹۵۸ء میں انڈسٹریل ریسرچ لیبارٹریز سے وابستہ ہوئے پھر مزید تعلیم کے لندن گئے اور ۱۹۵۹ء میں وہاں کے کنگز کالج سے کیمیکل انجینئرنگ میں ڈپلوما حاصل کیا، واپسی کے بعد ۱۹۷۴ء میں پنجاب یونیورسٹی سے علوم اسلامیہ میں ایم۔اے کیا، ۱۹۸۵ء میں قائداعظم لائبریری میں ملازمت کی، اس ے وابستگی کے زمانے میں بچوں کے لیے آسان زبان میں متعدد مفید اور معلوماتی کتابیں تحریر کیں، جو بہت مقبول ہوئیں اور بعض پر ان کو ایوارڈ بھی ملا، گو ان کتابوں میں فلکی طبعیات کی جدید ترین تحقیقات کے نتائج اور کائنات کے بارے میں نئے افکار و نظریات پیش کیے گئے ہیں تاہم اسلامی نقطہ نظر کو اوجھل...
Stunning is the process of rendering animals immobile or unconscious, with or without killing the animal, when or immediately prior to slaughtering them for food. In modern slaughterhouses a variety of stunning methods are used on livestock. Methods include: Electrical stunning, Gas stunning, Percussive stunning. There are three opinions of Islamic scholars about stunning. Those scholars; who do not allow stunning at all; are of the view that the method of rendering animals unconscious before slaughter is against the shairah method and Sunnah, and it is Makrooh e Teḥreemi. Before slaughtering, if an animal died due to stunning, then that animal is carcass and is not allowed to be eaten. But, if before slaughter, ḥayat e Mustaqirrah is present in animal and it is slaughtered in that condition then it is permissible to eat it. Certain scholars allow stunning in certain situations with some terms and conditions. The decisions of Mjam e Faqhiyyah of modern age are also based on conditional permission. Moreover, Mufti Muḥammad Taqi Usmani, Dr. Wahabah Zoḥaili and Abdul Aziz Bin Baaz agree with conditional permission, while some other scholars allow all types of stunning without any condition; Mufti Muḥammad Abduho and his pupil Allamah Rasheed Raza Miṣri agree with later opinion.
The purpose of this study is to develop a strategy framework using the unified life cycle model (Product lifecycle and Industry life cycle). As this study is descriptive in nature and it has used multi-staged mixed methods. At first stage qualitative data was collected through interviews and focus groups while at a later part of the research quantitative data was collected from the marketing managers of telecom sector (N=100). This study provides numerous benefits over earlier studies. Firstly, both Product Life Cycle (PLC) and Industry Life Cycle (ILC) have shown weaknesses and limitations. This research has unified both PLC and ILC into one Unified Life Cycle (ULC) combining the strengths and reducing the weakness of both life cycles. Secondly, earlier studies failed to provide any integrated strategic framework of selecting appropriate marketing strategies; using both PLC and ILC in silos. The current research provides an integrated strategic framework for strategy selection using both PLC and ILC and has studied the telecom sector in Pakistan. Finally and probably most importantly this study has devised a Unified Life Cycle model showing an integrated strategy map and depicting appropriate marketing mix strategy to be used for each stage of the life cycles. Two methodological improvements also make this research as distinct achievement as compared to earlier work on this subject area. Firstly, earlier studies only provide four stages of PLC and ILC each. This research has divided each stage PLC and ILC into two stages Early and Late for each stage. This provides more in-depth and focused analysis. Secondly, earlier studies have focused on theoretical methodologies while this research has involved both academicians and practicing managers as experts. This has increased the worthiness of this piece of research for both academicians and practicing managers.