Integrating flood depth and plant resistance with chlorantraniliprole seed treatments for management of rice water weevil,Lissorhoptrus oryzophilus(Coleoptera: Curculionidae)

2014 ◽  
Vol 22 (5) ◽  
pp. 679-687 ◽  
Author(s):  
Srinivas K. Lanka ◽  
David C. Blouin ◽  
Michael J. Stout
Keyword(s):  
Plant Resistance ◽  
Seed Treatments ◽  
Lissorhoptrus Oryzophilus ◽  
Rice Water Weevil ◽  
Flood Depth ◽  
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.

scholarly journals Chromosome Unipolar Division and Low Expression of Tws May Cause Parthenogenesis of Rice Water Weevil (Lissorhoptrus oryzophilus Kuschel)

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 278
Author(s):  
Pengcheng Wang ◽  
Fangyuan Yang ◽  
Zhuo Ma ◽  
Runzhi Zhang
Keyword(s):  
Drosophila Melanogaster ◽  
Quantitative Pcr ◽  
Ovarian Tissue ◽  
Expression Patterns ◽  
Meiotic Spindle ◽  
Lissorhoptrus Oryzophilus ◽  
Rice Water Weevil ◽  
Rice Water ◽  
Beijing China ◽  
Low Expression

Rice water weevil (RWW) is divided into two types of population, triploid parthenogenesis and diploid bisexual reproduction. In this study, we explored the meiosis of triploid parthenogenesis RWW (Shangzhuang Town, Haidian District, Beijing, China) by marking the chromosomes and microtubules of parthenogenetic RWW oocytes via immunostaining. The immunostaining results show that there is a canonical meiotic spindle formed in the triploid parthenogenetic RWW oocytes, but chromosomes segregate at only one pole, which means that there is a chromosomal unipolar division during the oogenesis of the parthenogenetic RWW. Furthermore, we cloned the conserved sequences of parthenogenetic RWW REC8 and Tws, and designed primers based on the parthenogenetic RWW sequence to detect expression patterns by quantitative PCR (Q-PCR). Q-PCR results indicate that the expression of REC8 and Tws in ovarian tissue of bisexual Drosophila melanogaster is 0.98 and 10,000.00 times parthenogenetic RWW, respectively (p < 0.01). The results show that Tws had low expression in parthenogenetic RWW ovarian tissue, and REC8 was expressed normally. Our study suggests that the chromosomal unipolar division and deletion of Tws may cause parthenogenesis in RWW.

scholarly journals On the spatial spread of the Rice Water Weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Erirhinidae), in Italy

2010 ◽  
Vol 42 (2) ◽  
pp. 81 ◽  
Author(s):  
Daniela Lupi ◽  
Mario Colombo ◽  
Maria Luisa Giudici ◽  
Bruno Villa ◽  
Cesare Cenghialta ◽  
...  
Keyword(s):  
Lissorhoptrus Oryzophilus ◽  
Corine Land Cover ◽  
Spatial Spread ◽  
Rice Water Weevil ◽  
Rate Of Spread ◽  
Rice Area ◽  
Stratified Dispersal ◽  
Land Cover Map ◽  
Rice Water ◽  
Environmental Landscape

A five year study has been made to establish the spread of the rice water weevil <em>Lissorhoptrus oryzophilus</em> (Coleoptera: Erirhinidae) in Northern Italy. Data obtained with GPS from 2005 throughout 2009 were first georeferenced with SW ArcGis&reg; 9.2, then overlapped and compared to the map of the European environmental landscape based on the interpretation of satellite images (CORINE Land Cover map) and to the hydrographic chart CT10 (Technical Regional map 10000). The analysis of the radial rate of spread per year indicates a deceleration in the expansion from 10.864 &plusmn; 6.801 km/year in 2005 to 5.318 &plusmn; 1.401 km/year in 2009. In five years the weevil has expanded its distribution in nearly all rice paddies in Lombardy and Piedmont, over an area of about 200,000 ha, which correspond to 86% of the total Italian rice area. Its expansion is thought to follow a type of stratified dispersal, due both to insect adult active dispersal and to accidental movements caused by human transportation.

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

A Way to Distinguish Sex of Adult Hylobius Weevils in the Field

1966 ◽  
Vol 98 (10) ◽  
pp. 1118-1119 ◽  
Author(s):  
L. F. Wilson ◽  
C. D. Waddell ◽  
I. Millers
Keyword(s):  
North America ◽  
North American ◽  
Abdominal Sternite ◽  
Hylobius Abietis ◽  
Lissorhoptrus Oryzophilus ◽  
Female Adult ◽  
Rice Water Weevil ◽  
Rice Water

The median depression on the last abdominal sternite is a useful character for distinguishing, in the field, the male from the female adult of all North American Hylobius species.Everett and Newsom (1964) used a midline depression or sulcus on the abdominal sternites to separate the sexes of the rice water weevil, Lissorhoptrus oryzophilus (Kushel), and other weevils that are not closely related to species of Hylobius in North America. The male of Hylobius abietis L., a European relative, is distinguished from the female by a saucerlilte depression on the last sternite (Anonymous 1952). Millers et al. (1963) state that the first and second visible abdominal sterna of the male H. rhizophagus Millers are concave, and the fifth has a slight median depression; the female sterna are convex.

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