منابع مشابه
Alternatives to Chemical Control of Insect Pests
In 2011, practitioners and advocates of Integrated Pest Management (IPM) find themselves addressing agricultural, societal, and political pressures worldwide resulting from human population growth. This growth brings simultaneous burdens of sustaining a steady food supply; these include preventing losses from pests, dealing with increased human global travel, which in turn intensifies opportuni...
متن کاملcomparable application cultural, biological and chemical control of pests, diseases and weeds in rice
the aim of this study was to comparable application cultural, biological and chemical control methods of pests, diseases and weeds in rice among paddy farmers in sari county. a sample of 260 farmers was selected by using proportional random sampling method. data were collected by means of a questionnaire. validity of questionnaire was confirmed by agricultural jihad experts of sari county and s...
متن کاملBt crops benefit natural enemies to control non-target pests
Crops producing insecticidal crystal (Cry) proteins from Bacillus thuringiensis (Bt) control important lepidopteran pests. However, pests such as aphids not susceptible to Cry proteins may require other integrated pest management (IPM) tactics, including biological control. We fed aphids on Bt and non-Bt plants and analyzed the Bt protein residue in aphids and compared the effects of Bt plants ...
متن کاملextraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties
آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولControl of Agricultural Pests
All over the world a huge effort is being made to fight these pests and now new weapons have been added to man's armoury in this battle. These are radioactive isotopes and radiation sources. Their contribution to the control of agricultural pests is not yet precisely calculable, but several promising lines of attack have been opened up and some concrete r e sults already achieved. The main valu...
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ژورنال
عنوان ژورنال: Soil Science
سال: 1961
ISSN: 0038-075X
DOI: 10.1097/00010694-196108000-00025