國立虎尾科技大學 |

LATE LEAF SPOT MANAGEMENT STRATEGIES FOR PEANUT PRODUCTION IN SOUTH CHINA (CERCOSPORIDIUM, PERSONATUM).

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	LATE LEAF SPOT MANAGEMENT STRATEGIES FOR PEANUT PRODUCTION IN SOUTH CHINA (CERCOSPORIDIUM, PERSONATUM)./
作者:	THEBERGE, ROBERT LAURIER.
面頁冊數:	1 online resource (87 pages)
附註:	Source: Dissertation Abstracts International, Volume: 44-01, Section: B, page: 8000.
標題:	Plant pathology. -
電子資源:	click for full text (PQDT)

LATE LEAF SPOT MANAGEMENT STRATEGIES FOR PEANUT PRODUCTION IN SOUTH CHINA (CERCOSPORIDIUM, PERSONATUM).
THEBERGE, ROBERT LAURIER.

LATE LEAF SPOT MANAGEMENT STRATEGIES FOR PEANUT PRODUCTION IN SOUTH CHINA (CERCOSPORIDIUM, PERSONATUM). - 1 online resource (87 pages)

Source: Dissertation Abstracts International, Volume: 44-01, Section: B, page: 8000.

Thesis (Ph.D.)--The Pennsylvania State University, 1983.

Includes bibliographical references

The epidemiology and crop loss relationships of late leaf spot of peanuts (Cercosporidium personatum (Berk. and Curt.) Deighton) were studied in South China to provide information necessary for developing integrated pest management (IPM) strategies for commercial peanut (Arachis hypogaea L.) production in that region. Field plot studies were conducted at the South China Agricultural College research farm near Guangzhou (Canton), the People's Republic of China, during the fall 1981 cropping season. Sampling techniques were developed that allowed disease assessment at relatively low levels of disease. Analyses of these results demonstrated that epidemic onset apparently occurs early in the fall crop season. Manipulation of disease progress, as judged by apparent infection rates, was possible with a few timely applications of chlorothalonil. Multiple stress factor crop loss models demonstrated the importance of several stress factors, including late leaf spot on peanut yields.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

Subjects--Topical Terms:

1183408
Plant pathology.
Index Terms--Genre/Form:

554714
Electronic books.

LATE LEAF SPOT MANAGEMENT STRATEGIES FOR PEANUT PRODUCTION IN SOUTH CHINA (CERCOSPORIDIUM, PERSONATUM).
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500 $a Source: Dissertation Abstracts International, Volume: 44-01, Section: B, page: 8000.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1983.
504 $a Includes bibliographical references
520 $a The epidemiology and crop loss relationships of late leaf spot of peanuts (Cercosporidium personatum (Berk. and Curt.) Deighton) were studied in South China to provide information necessary for developing integrated pest management (IPM) strategies for commercial peanut (Arachis hypogaea L.) production in that region. Field plot studies were conducted at the South China Agricultural College research farm near Guangzhou (Canton), the People's Republic of China, during the fall 1981 cropping season. Sampling techniques were developed that allowed disease assessment at relatively low levels of disease. Analyses of these results demonstrated that epidemic onset apparently occurs early in the fall crop season. Manipulation of disease progress, as judged by apparent infection rates, was possible with a few timely applications of chlorothalonil. Multiple stress factor crop loss models demonstrated the importance of several stress factors, including late leaf spot on peanut yields.
520 $a Traditional leaf spot control methods, including backpack equipment, a sulfur complex fungicide, and common spray schedules, were compared to chlorothalonil and ultra low volume controlled droplet applicators to see if measurable benefits could be gained. The phytotoxicity of the sulfur complex reduced the desirability of this fungicide relative to chlorothalonil. Disease control was virtually equal with the two types of sprayers.
520 $a Late leaf spot forecasting methods were tested to see if a few well-timed applications of chlorothalonil could significantly control the disease and improve peanut yields. The University of Georgia's weather based peanut leaf spot forecasting system was tested and found to be too conservative to give adequate disease control when the number of sprays was limited to a maximum of three. A second forecasting method, termed "subsequent sampling," relied on a sampling procedure which called for a limited number of applications at critical thresholds of disease incidence. Significantly better disease control and higher plot yields were obtained when three applications of chlorothalonil were scheduled by this method.
520 $a Economic analysis of the use of chlorothalonil was made to determine if the cost of a foreign manufactured pesticide could be justified. Benefit/cost ratios of increased peanut yields to pesticide costs gave ratios as high as 5.6:1.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Plant pathology. $3 1183408
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a The Pennsylvania State University. $3 845556
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