6 results found, view free essays on page:
-
Invasion Of Molesta Kariba Weed
1,104 words... the traditional transplanted method to direct seeding method was taking place particularly at Must rice granary area. The increased usage of fertilizers resulted in the leaching of a certain amount of nutrients into the aquatic ecosystems. A fertilizer that is generally rich in phosphate and nitrate plays an important role in triggering the tremendous growth of floating weeds (Caffrey et. al 1996). A noticeable feature of rice fields that depend heavily on the use of fertilizer is the occurr...
Free research essays on topics related to: southern united states, degrees celsius, water bodies, biological control, p m -
Biological Control E G
317 wordsGive an account of the ways in which biological control can be used to control pest numbers. The effect of predator-prey relationship in regulating populations has been exploited by humans as a method of controlling various pests. Biological pest control is where the natural predators (agent) of the pest ( (target) are used to reduce its population to a tolerable level. It is important to make sure that the right predator is chosen, so it must be studied in quarantine to make sure that once the ...
Free research essays on topics related to: e g, biological, larvae, pest, biological control -
Natural Enemies Naturally Occurring
1,817 wordsWhat are Biopesticide's? Biopesticide's (also known as biological pesticides) are certain types of pesticides derived from such natural materials as animals, plants, bacteria, and certain minerals. For example, garlic, mint, and baking soda all have pesticides applications and are considered biopesticide's. At the end of 1998, there were approximately 175 registered bio pesticide active ingredients and 700 products. Biopesticide's fall into three major categories: 1) Microbial pesticides contain...
Free research essays on topics related to: genetic material, biological control, broad spectrum, natural enemies, naturally occurring -
Southern United States Plants And Animals
2,223 wordsIntroduction The plant Salvinia modest, generally known as Giant Salvinia or Kariba weed, is a free floating pterophyta indigenous to south-east brazil (Julien et. al 1987). Today plants and animals are shipped, sometimes accidentally, all over the globe to zoos, botanical gardens, and for commercial and agricultural purposes. A small minority of? alien? plants, or introduced, species become ecological as well as economic disasters. Although they may have been innocuous in their native region, t...
Free research essays on topics related to: plants and animals, biological control, degrees celsius, water bodies, southern united states -
Degrees Celsius Sugar Cane
2,695 wordsTHE AUSTRALIAN CANE TOAD Introduction The cane toad, Bufo marinus, or giant toad, was introduced to Australia by the sugar cane industry with government sanction, in order to control two specific pests of sugar cane. The grey backed cane beetle and the frenchie beetle. Native to Central and South America, the cane toad has been introduced to several Pacific islands as well. One hundred and one toads arrived at Edmonton in North Queensland in June 1935. About 11 sugar growing locations in norther...
Free research essays on topics related to: degrees celsius, native species, internal organs, cause disease, sugar cane -
Body Of Water Biological Control
824 wordsMilf oil in the Northwest In Northern Idaho weed infestations of lakes, rivers, and streams have been increasing over the last few years. Doug Freeland is the Northern Idaho expert on a particular type of underwater weed, milf oil, that is rapidly spreading through many freshwater sources in Idaho as well as the rest of North America. Freeland s expertise has been used by Idaho counties, Washington counties, and the US Forest Service on the particularly nasty weed. Eurasian milf oil, or formally...
Free research essays on topics related to: north america, plant life, body of water, biological control, weed
6 results found, view free essays on page:
