Simulated Insect Damage to Rice: Effects of Leaf Removal

Bowling, C. C.

doi:10.1093/jee/71.2.377

Cited by 13 publications

(17 citation statements)

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“…In the present study, most damage was caused by defoliation in the vegetative stage V8 (45.9%), unlike the observed by Bowling (1978) that reported a decrease of approximately 12% for this same stage. This might be a peculiarity of the Cambará cultivar used in this study.…”

Section: Resultscontrasting

confidence: 84%

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Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production

Krinski

Foerster

2017

Biosci. J.

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ABSTRACT:Simulation of the attack of defoliating insects provides a measurement of the level of damage that the crop can support at a given developmental stage and also allows to quantify the loss of productivity. This study evaluated the effects of increasing levels of artificial defoliation in upland rice plants under field conditions, on grain production at three phenological stages, vegetative stage V8 (collar formation in the 8th leaf of the main stem), vegetative stage V12 (formation of the flag leaf) and reproductive stage R3/R4 (liberation of the panicle or anthesis). The percentage of damage at all stages increased significantly from 25% defoliation, and was higher when defoliation occurred in V8 and V12. Defoliation levels up to 50% in the reproductive stage did not influence the quantity of filled grains, total spikelets per panicle and weight of filled grains per panicle, and thus the pest control is not required at this stage. The data show that the control of leaf-chewing insects in upland rice should be restricted to the vegetative stage.

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Section: Resultscontrasting

confidence: 84%

“…This might be a peculiarity of the Cambará cultivar used in this study. As reported by Bowling (1978), different varieties or plants under stress conditions may respond differently to defoliation.…”

Section: Resultsmentioning

confidence: 80%

Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production

Krinski

Foerster

2017

Biosci. J.

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“…Thus, defoliation can reduce rice yields significantly (Bowling, 1978). However, yield loss is highly dependent on the age of the plant when defoliation occurs, and plants can recover and compensate for defoliation damage, even resulting in yields higher than those of undamaged plants (Taylor, 1972).…”

Section: Introductionmentioning

confidence: 99%

Response of lowland rice plants to simulated insect defoliation in West Africa

Oyediran¹,

Heinrichs²

2002

International Journal of Pest Management

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Field experiments were conducted to investigate the impact of simulated insect-caused defoliation on irrigated rice. Defoliation levels tested were 0% (control), 25% defoliation at 21 days after transplanting (dat), 25% defoliation at 41 dat, 25% defoliation at 21 and 42 dat, 50% defoliation at 21 dat, 50% defoliation at 42 dat, 75% defoliation at 21 dat, 75% defoliation at 42 dat, 75% defoliation at 21 and 42 dat, 100% defoliation at 21 dat, and 100% defoliation at 21 and 42 dat. Tiller height, total number of tillers, per cent panicle-bearing tillers, weight of 100 grains and grain yields were recorded. The rice plant when defoliated just before tillering or in the tillering stage has the ability to compensate for defoliation damage. No yield losses occurred at 25% defoliation. Defoliation of 100% had a significant effect on the total number of tillers and on grain yield. Yield losses at 100% defoliation over the 3 years of the study averaged 40% in the 21 dat treatment and 55% in the 21 and 42 dat treatment. The implications of the development of cultural practices to manage lowland rice defoliating insects are discussed.

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“…Larvae prefer to feed on young rice plants or new growth of grasses (54). Most larvae that develop on flooded rice never pupate, as they normally pupate in the soil; because of this, FAW is considered a sporadic pest of rice in the southern United States (55,56). In other countries, however, this insect has been reported to cause severe damage to rice at the seedling stage (57)(58)(59).…”

Section: Effects Of Cap and Tmx On Other Early And Mid-season Pests Omentioning

confidence: 99%

The Use of Systemic Anthranilic Diamide and Neonicotinoid Seed Treatments in Rice Pest Management

Lanka

Stout

2014

ACS Symposium Series

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The rice water weevil, Lissorhoptrus oryzophilus, is the key insect pest of rice in the United States. Over the last five years, anthranilic diamide and neonicotinoid seed treatments have been introduced into the U.S. rice market for management of rice water weevils and other early and mid-season pests. This chapter reviews several aspects of the use of seed treatments in rice. In a four-year field study involving over 40 commercial fields throughout Louisiana, threshold densities of rice water weevil larvae were exceeded in over 80% of untreated fields. Seed treatments of thiamethoxam, a neonicotinoid, were about as effective as foliar applications of pyrethroids at reducing densities of rice water weevil larvae in commercial fields, while seed treatments containing chlorantraniliprole were significantly more effective than pyrethroids or thiamethoxam. A series of greenhouse studies demonstrated that seed treatments of chlorantraniliprole and thiamethoxam have differential effects on life stages of the rice water weevil. Seed treatment with thiamethoxam reduced survival of adults feeding on leaves of treated plants, and had pronounced effects on egg-laying and early instar survival; chlorantraniliprole seed treatment, in contrast, had no effects on adults and exerted its effects primarily on root-feeding larvae. These differences in biological activities were consistent with patterns of distribution of insecticides in tissues of treated plants: high concentrations of chlorantraniliprole were found

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Simulated Insect Damage to Rice: Effects of Leaf Removal

Cited by 13 publications

References 0 publications

Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production

Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production

Response of lowland rice plants to simulated insect defoliation in West Africa

The Use of Systemic Anthranilic Diamide and Neonicotinoid Seed Treatments in Rice Pest Management

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