Download Diseases, pests and disorders of potatoes : a colour by Stuart Wale, Bud Platt, Nigel D. Cattlin PDF

By Stuart Wale, Bud Platt, Nigel D. Cattlin

Overlaying the real pathogens, this instruction manual offers concise descriptions of the indications and cycles of illnesses, their distribution and fiscal value and recommendation on their regulate. it is also 'pest profiles' that determine with using color photos, the pests that quite often prey on potato crops.

Covering crucial pathogens, this guide presents transparent, concise descriptions of the indicators and cycles of ailments, their distribution and financial value and recommendation on their keep watch over. The textual content is illustrated with over 250 terrific color images of affected vegetation to help within the speedy identity of ailments. The ebook additionally contains 'pest profiles' that establish with using color images, the pests that often prey on potato crops. Read more...

content material: Bacterial illnesses --
Fungal and fungal-like illnesses --
Virus and phytoplasma ailments --
Nematodes --
bugs and different pests --
Non-infectious disorders

This illustrated guide offers transparent, concise descriptions of the indications and cycles of illnesses and issues, and the pests that more often than not prey on potato plants, their distribution and Read more...

Show description

Read or Download Diseases, pests and disorders of potatoes : a colour handbook PDF

Similar agricultural sciences books

Soil~Plant Relationships: An Ecological Approach

Soil-plant relationships as soon as had a restricted that means. To the coed of agriculture it intended growing optimal stipulations for plant development. To the ecologist it intended explaining a few plant group distribu­ tion styles via correlation with soil sort or stipulations. This twin view has been tremendously increased at an educational point via the invention of the atmosphere as a pragmatic operating unit.

A short course in soil-structure engineering of deep foundations, excavations and tunnels

CD contains pupil variations of the OASYS software program programs 'FREW' and 'Safe'. summary: makes a speciality of the 3 significant geotechnical demanding situations of static soil-structure interplay difficulties: Deep foundations - piles, barrettes, Multi-propped deep excavations, and Bored and open face tunnels underneath towns.

Tropical Rain Forests: An Ecological and Biogeographical Comparison

The 1st variation of Tropical Rain Forests: an Ecological and Biogeographical comparability exploded the parable of ‘the rain wooded area’ as a unmarried, uniform entity. in truth, the main tropical rain wooded area areas, in tropical the USA, Africa, Southeast Asia, Madagascar, and New Guinea, have as many transformations as similarities, because of their isolation from one another in the course of the evolution in their floras and faunas.

An introduction to drip irrigation systems

Drip Irrigation procedure is now a longtime approach to irrigation in water scarce parts however it can be gaining value in water considerable parts. during this expertise, the cropped box is irrigated within the shut region of root area of crop. It reduces water loss happening via evaporation, conveyance and distribution.

Additional info for Diseases, pests and disorders of potatoes : a colour handbook

Sample text

E. a later harvest date usually leads to more disease). The incidence of black dot also increases the more frequently a field is used for potato cultivation. In storage, infection and symptom development are favoured by warm, humid conditions. Studies have shown an increase in disease in F UNGAL tubers held at 15°C compared with those kept at 5°C. However, tuber necrosis may be accentuated at lower temperatures. Soil adhering to tubers in storage could be a source of inoculum contributing to disease development after harvest.

Gangrene). In section, lesions caused by F. sulphureum (syn. F. ) are light to dark brown in colour, dry and crumbly in texture with a distinct dark brown but irregular margin to the lesion (41). Fungal growth within the lesion can vary in colour from white, through yellow to red. In section, lesions caused by F. coeruleum are dark brown in the older part of the lesion, fading to a lighter brown which merges into the healthy tissue (42, 43). F. coeruleum lesions have a more regular edge than those of F.

1982) The effect of humidity on potato gangrene development in naturally contaminated tubers. Plant Pathology, 31: 61–64. Hide, G. , Cayley, G. R. (1989) Factors influencing the control of potato gangrene by fungicide treatment. Potato Research, 32: 91–99. , Copeland, R. , Little, G. (1976) The effects of various chemical and physical haulm treatments on the incidence of potato gangrene. Annals of Applied Biology, 84: 221–229. G ANGRENE Life cycle and biology Pycnidiospores (4–5 × 2–3 μm) can persist in dust in store – especially on a grading line – and contaminate otherwise healthy tubers.

Download PDF sample

Rated 4.77 of 5 – based on 7 votes