Biological control of Rhizoctonia solani on potatoes by antagonists. 4. Inoculation of seed tubers with Verticillium biguttatum and other antagonists in field experiments

1985 ◽  
Vol 91 (2) ◽  
pp. 49-63 ◽  
Author(s):  
G. Jager ◽  
H. Velvis
Keyword(s):  
Biological Control ◽  
Rhizoctonia Solani ◽  
Field Experiments ◽  
Verticillium Biguttatum ◽  
Seed Tubers

Chemical and biological control of Rhizoctonia solani on potato seed tubers

1995 ◽  
Vol 35 (5) ◽  
pp. 661 ◽  
Author(s):  
TJ Wicks ◽  
B Morgan ◽  
B Hall
Keyword(s):  
Biological Control ◽  
Rhizoctonia Solani ◽  
Sodium Hypochlorite ◽  
Spore Suspension ◽  
Potato Seed ◽  
Verticillium Biguttatum ◽  
Seed Tubers ◽  
Biological Treatments

Chemical and biological treatments for the control of tuber-borne inoculum of R. solani on potatoes were evaluated by testing the viability of sclerotes removed from treated tubers. This technique showed that most sclerotes adhering to the tuber surface were devitalised when tubers were dipped for 20 min in a 2% solution of formaldehyde. Dusting tubers with toclofos-methyl, or spraying them with fenpiclonil or pencycuron, gave control equal to formaldehyde, whereas a sodium hypochlorite dip was ineffective. A spore suspension of Verticillium biguttatum applied to tubers as either a dip or a spray devitalised >90% of treated sclerotes, whereas similar treatments of other organisms such as Bacillus, Gliocladium, and Trichoderma were ineffective.

scholarly journals The yield of potato plants as affected by stem canker (Rhizoctonia solani), blackleg (Erwinia carotovora subsp. atroseptica) and by neighbouring plants

1996 ◽  
Vol 126 (4) ◽  
pp. 429-440 ◽  
Author(s):  
G. A. Hide ◽  
S. J. Welham ◽  
P. J. Read ◽  
A. E. Ainsley
Keyword(s):  
Rhizoctonia Solani ◽  
Field Experiments ◽  
Tuber Yield ◽  
Erwinia Carotovora ◽  
Stem Canker ◽  
Potato Seed ◽  
Size Distributions ◽  
Potato Plants ◽  
Seed Tubers ◽  
Yield Gaps

SUMMARYPotato seed tubers inoculated with Rhizoctonia solani and Erwinia carotovora subsp. atroseptica, to induce stem canker and blackleg respectively, were planted with uninoculated seed tubers in field experiments designed to measure the effects of the diseases and of neighbouring plants on tuber yield. Gaps were also included. The plant variables total and ware (> 150 g) yields and tuber numbers were affected by disease, and also by competition from the two plants on either side in the same row (first neighbours), and increased as competition from neighbouring plants decreased. Plants adjacent to the first neighbours also influenced yields of plants with stem canker but those in adjacent rows did not have a significant effect with either disease. Both diseases altered the tuber size distributions, which were also modified by neighbouring plants. The data were used to predict total and ware yields for crops containing different proportions of healthy, diseased and missing plants.

scholarly journals Effect of Plant Extracts and Biological control agents on Rhizoctonia solani Kuhn

2021 ◽  
Vol 735 (1) ◽  
pp. 012079
Author(s):  
Muneer Saeed M. Al-Baldawy ◽  
Ahed A A H Matloob ◽  
Mohammed K. N. Almammory
Keyword(s):  
Biological Control ◽  
Rhizoctonia Solani ◽  
Plant Extracts ◽  
Biological Control Agents

Biological Control of Ducksalad (Heteranthera limosa) by the Waterlily Aphid (Rhopalosiphum nymphaeae) in Rice (Oryza sativa)

Weed Science ◽  
1992 ◽  
Vol 40 (2) ◽  
pp. 333-336 ◽  
Author(s):  
Michael J. Oraze ◽  
Albert A. Grigarick
Keyword(s):  
Biological Control ◽  
Oryza Sativa ◽  
Field Experiments ◽  
Weed Biomass ◽  
Water Vegetation

Ducksalad, an annual broadleaf weed in rice, was infested by waterlily aphid which destroyed much of the above-water vegetation. Field experiments showed aphids reduced total weed biomass by 58 and 87% in 1985 and 1986, respectively. Biomass of seed pods was reduced by more than 82% in both years.

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