摘要:

AbstractAlthough numerous types of intégrated plant protection programs have been elaborated and, in many areas, also effectuated, reports on the actual results and effects of the application of integrated plant protection are scarce. The author attempts to examine the results of integrated plant protection activities in Austria by means of a structural analysis of the use of plant protection products. It is concluded that the efforts of plant protection scientists have been successful both in developing a plant protection method that does not adversely affect the environment and in integrating non‐chemical and chemical methods of pest control. As a consequence of the refined techniques used in forecasting and warning services, application of chlorinated hydrocarbon insecticides and the total use of insecticides are diminishing. On the other hand, the use of fungicides is moderately increasing and that of herbicides has doubled over the preceding deca

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02142.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractA review ofSeptoriadiseases of wheat is given with particular emphasis on the resistance of this host toSeptoria nodorumBerk. Following a general historical outline, the effects of glume blotch on the wheat plant are described, including symptoms and physiological changes. Brief reference is made to epidemiological studies, and then resistance breeding and genetic studies are discussed. The role of antifungal compounds in resistance is dealt with in more detail, and with reference to the author's own research results. It is concluded that no single mechanism of resistance of wheat toS. nodorumemerges and that the resistance factors appear to be varying quantitatively rather than qualitatively.

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02143.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractOut of 140 soybean samples tested from 17 countries, 42 originating from Brazil, Colombia, Iran, Korea, Malaysia, Thailand and the United States were found to be contaminated by oospores ofPeronospora manshurica(Naum.) Syd. Oospores are generally present as a crust on the seed coat, and are easily detected during visual examination; however, individual spores may stick to the surface of non‐crusted seed, and these spores are detectable only by examining surface washings.A new method for testing the viability of oospores by the tetrazolium chloride test is described. Viable oospores turn orange‐red. In all oospore collections, viability tested by this method was generally higher than germination recorded in water. One to 2‐year‐old oospores showed 30 to 39% viability, while an 8‐year‐old collection had about 20% viable spores. Oospores collected from 1‐year‐old seed treated with captan showed 6 to

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02144.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractOn the basis of investigations on the cereal cyst nematode's distribution, it is presumed that one third of all the cereal growing areas in Denmark is infested to a degree, and that yield losses of 5 % or more may be assumed. This means an annual loss of about 100 million D.Kr. By using resistant cultivars every second year, the population ofHeterodera avenaeWoll. can be kept at a harmless level. It may be assumed that intensive growing of nematode‐resistant cereals includes a risk of promoting the occurrence of pathotypes other than the 2 known to exist in Denmark. So far, there is no indication for their existenc

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02145.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractDamage caused by larvae ofEarias insulanaBoisd. is of great economic importance to growers of okra (Hibiscus esculentus) in the areas of Kiti‐Perivolia, on the south‐east coast of Cyprus, near Larnaca. In order to minimize the damage caused by larvae feeding on okra fruits, several organophosphorous and organo‐carbamate insecticides with relatively low mammalian toxicity were tested during the years 1972, 1973, 1976 and 1977. Permethrin, methomyl, pirimiphos‐methyl and chlorpyrifos gave encouraging

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02146.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02147.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02148.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02149.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02150.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0250-8052    

DOI:10.1111/j.1365-2338.1978.tb02151.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY