Activity of chlorantraniliprole and thiamethoxam seed treatments on life stages of the rice water weevil as affected by the distribution of insecticides in rice plants

2013 ◽  
Vol 70 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Srinivas K Lanka ◽  
Michael J Stout ◽  
Julien M Beuzelin ◽  
James A Ottea
Keyword(s):  
Life Stages ◽  
Seed Treatments ◽  
Rice Plants ◽  
Rice Water Weevil ◽  
Rice Water

scholarly journals EVALUATION OF SEED TREATMENTS FOR RICE WATER WEEVIL CONTROL, 2001

2002 ◽  
Vol 27 (1) ◽  
Author(s):  
M. O. Way ◽  
R. G. Wallace ◽  
M. S. Nunez ◽  
G. N. McCauley
Keyword(s):  
Seed Treatments ◽  
Rice Water Weevil ◽  
Rice Water

scholarly journals SEED TREATMENTS FOR RICE WATER WEEVIL CONTROL, 2003

2004 ◽  
Vol 29 (1) ◽  
Author(s):  
M. O. Way ◽  
R. G. Wallace ◽  
M. S. Nunez ◽  
G. N. McCauley
Keyword(s):  
Seed Treatments ◽  
Rice Water Weevil ◽  
Rice Water

scholarly journals Use of potted seedlings for reducing damage by rice water weevil in transplanted rice plants

2015 ◽  
Vol 50 (4) ◽  
pp. 115-126
Author(s):  
Takashi Motobayashi ◽  
Minoru Yoshida ◽  
Humiya Yamaguchi ◽  
koji Matsukawa
Keyword(s):  
Rice Plants ◽  
Rice Water Weevil ◽  
Transplanted Rice ◽  
Rice Water

scholarly journals Evaluation of Flood Removal in Combination with Insecticide Seed Treatment for Rice Water Weevil (Coleoptera: Curculionidae) Larval Management in Rice

2020 ◽  
Vol 113 (5) ◽  
pp. 2235-2240
Author(s):  
F R Kelly ◽  
J Gore ◽  
D R Cook ◽  
A L Catchot ◽  
B R Golden ◽  
...  
Keyword(s):  
Untreated Control ◽  
Seed Treatment ◽  
Economic Losses ◽  
Economic Returns ◽  
Seed Treatments ◽  
Lissorhoptrus Oryzophilus ◽  
Flooded Rice ◽  
Rice Water Weevil ◽  
Rice Water ◽  
Extension Center

Abstract An experiment was conducted at the Delta Research and Extension Center in Stoneville, MS during 2017 and 2018 to determine whether removal of the flood is an economical method of control for rice water weevil, Lissorhoptrus oryzophilus Kuschel. This experiment compared a continuous flood production system to draining a rice field completely and reestablishing a flood for the remainder of the growing season. In addition, two insecticide seed treatments, thiamethoxam and chlorantraniliprole, were compared with an untreated control within each system. Rice water weevil densities were measured prior to draining at 3 wk after flood and again after the flood was reestablished in drained plots. Rice water weevil densities were greater in 2017 than 2018. Chlorantraniliprole at the predrainage and postdrainage sample timing reduced larval numbers compared with the untreated control. The plots where water was removed until soil cracking then re-flooded had significantly lower weevil populations than plots that were continuously flooded during 2018 only. Draining of plots resulted in lower yields in 2018, but not in 2017. Additionally, both of the insecticide seed treatments resulted in greater yields and economic returns than the untreated control. Draining of flooded rice when rice water weevil larvae were present did not provide a consistent benefit, and may result in yield and economic penalties. Insecticide seed treatments consistently provided greater yield benefits in flooded rice. Based on these results, draining of flooded rice is not recommended to manage rice water weevil and insecticide seed treatments should be used to minimize economic losses.

The influence of plant age on tolerance of rice to injury by the rice water weevil, Lissorhoptrus oryzophilus (Coleoptera: Curculionidae)

2002 ◽  
Vol 92 (2) ◽  
pp. 177-184 ◽  
Author(s):  
M.J. Stout ◽  
W.C. Rice ◽  
D.R. Ring
Keyword(s):  
Field Experiments ◽  
Yield Loss ◽  
The United States ◽  
Analysis Of Covariance ◽  
Yield Losses ◽  
Lissorhoptrus Oryzophilus ◽  
Rice Plants ◽  
Rice Water Weevil ◽  
Rice Water ◽  
The Impact

AbstractFor most plant species, tolerance to many types of herbivory increases as plants age, but the applicability of this pattern to root herbivory has not been tested. Injury to roots of rice plants by larvae of the rice water weevil, Lissorhoptrus oryzophilus Kuschel, causes severe reductions in yields in the United States. It is generally thought that young rice plants, because their root systems are smaller, are less tolerant than older plants of root feeding by L. oryzophilus. Field experiments were conducted to test this hypothesis. Plots of rice (4.7 to 6.5 m2) were established and subjected to natural infestations of L. oryzophilus larvae. A soil insecticide was applied to plots at different times during the tillering phase of rice in order to manipulate the timing of weevil infestation. The impact of these treatments (timings of insecticide applications) was assessed by comparing relationships between yield loss and larval pressure for each treatment using analysis of covariance. Yield losses ranged from 13% to over 40% in plots not treated with insecticide. Patterns of yield losses from plots treated with insecticide at different times were best explained by the hypothesis that yield loss is determined both by the age of plants infested and by the size of larvae infesting plants. Young plants appear to be less tolerant than older plants, and feeding by large larvae appears to be more deleterious than feeding by smaller larvae. Management practices that delay infestation of rice by L. oryzophilus until plants are older may be an important component of management programmes for this pest.

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