THE EFFECTS OF A SPUNBONDED POLYESTER ROW COVER ON CAULIFLOWER YIELD LOSS CAUSED BY INSECTS

1988 ◽  
Vol 120 (1) ◽  
pp. 45-47 ◽  
Author(s):  
Katherine V. Millar ◽  
Murray B. Isman
Keyword(s):  
Pest Control ◽  
Field Trial ◽  
Yield Loss ◽  
Insect Pests ◽  
Total Yield ◽  
Delia Radicum ◽  
Harvest Date ◽  
Crop Plant ◽  
Row Covers ◽  
Early Harvest

AbstractA field trial was conducted to evaluate a spunbonded polyester row cover (Reemay) as a means of protecting cauliflower plants from insect pests. Total yield variables (curd weight, size, and color) did not differ significantly between plants under the row covers and those treated with insecticides, although plants under the row covers did produce a greater yield at an early harvest date. Plants in control plots failed to produce any marketable heads, owing to attack by cabbage maggots, Delia radicum (L.). Row covers may be a useful alternative to insecticides for pest control via physical exclusion of the key pest(s) from the crop plant.

scholarly journals THE EFFECTIVENESS OF ROW COVERS AS A BARRIER TO INSECT PESTS ON ROMAINE LETTUCE (PARRIS ISLAND COS)

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1116G-1116
Author(s):  
Mark Scaroni ◽  
Jo Ann C. Wheatley
Keyword(s):  
Pest Control ◽  
Chemical Control ◽  
Insect Pests ◽  
Average Weight ◽  
Romaine Lettuce ◽  
Row Covers ◽  
Vertebrate Pest ◽  
The Cost ◽  
Organically Grown ◽  
Control Insect

This project examined a floating row cover as an alternative to chemical use for pest control. Insect and vertebrate pest control was excellent on the covered versus the uncovered crop plants. Average weight, length, and quality were enhanced through the use of covers. The interval of transplant-to-harvest was also decreased. While the cost of row cover use is quite high on a per-acre basis, additional gains in quality, yields, earlier plantings, and earlier harvests may justify the use of row covers as an alternative to chemical control. Although acceptance and use of row covers may ultimately rely on the consumer, demand for organically grown vegetables will warrant further evaluation of row cover materials.

Reducing Imazethapyr Injury to Field Corn (Zea mays) with Naphthalic Anhydride

Weed Science ◽  
1991 ◽  
Vol 39 (4) ◽  
pp. 640-643 ◽  
Author(s):  
Laura D. Boldt ◽  
Michael Barrett
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Field Trial ◽  
Yield Loss ◽  
Total Yield ◽  
Naphthalic Anhydride ◽  
Corn Seed ◽  
Leaf Stage ◽  
Field Corn ◽  
Drought Conditions

A field trial was conducted in 1988 and 1989 to confirm the efficacy of naphthalic anhydride (NA) for providing full-season protection of corn from imazethapyr applied at various times and rates. NA applied as a 1% by weight dust to corn seed caused 6% injury 2 weeks after treatment (WAT) in 1989; however, plants recovered within 6 WAT and grain yield was not affected. Imazethapyr applied to corn untreated with NA resulted in greater than 30% injury for all treatments in both years except PRE in 1988. NA reduced phytotoxicity from all imazethapyr applications in 1989 and from PPI, early POST, and 4- to 5-leaf stage (mid-POST) applications in 1988. Despite the safening effect, corn injury was still observed 6 WAT in NA-treated corn for all imazethapyr applications in both years except early POST in 1988. Higher yields were produced from NA-treated than untreated corn with imazethapyr applied PPI in both years, PRE in 1989, early POST in both years, and mid-POST in 1988. Safened corn treated PPI and early POST yielded the same as the safened corn in the control in both years. Imazethapyr applied at the 8- to 10-leaf stage caused total yield loss regardless of NA treatment. Drought conditions may have caused the lower corn injury and yield loss from imazethapyr observed in 1988 compared to 1989.

scholarly journals THE EFFECTIVENESS OF ROW COVERS AS A BARRIER TO INSECT PESTS ON ROMAINE LETTUCE (PARRIS ISLAND COS)

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1116g-1116
Author(s):  
Mark Scaroni ◽  
Jo Ann C. Wheatley
Keyword(s):  
Pest Control ◽  
Chemical Control ◽  
Insect Pests ◽  
Average Weight ◽  
Romaine Lettuce ◽  
Row Covers ◽  
Vertebrate Pest ◽  
The Cost ◽  
Organically Grown ◽  
Control Insect

This project examined a floating row cover as an alternative to chemical use for pest control. Insect and vertebrate pest control was excellent on the covered versus the uncovered crop plants. Average weight, length, and quality were enhanced through the use of covers. The interval of transplant-to-harvest was also decreased. While the cost of row cover use is quite high on a per-acre basis, additional gains in quality, yields, earlier plantings, and earlier harvests may justify the use of row covers as an alternative to chemical control. Although acceptance and use of row covers may ultimately rely on the consumer, demand for organically grown vegetables will warrant further evaluation of row cover materials.

The effect of harvest date on yield loss of long and short-grain rice cultivars (Oryza sativa L.) in Northeast China

2021 ◽  
Vol 131 ◽  
pp. 126382
Author(s):  
Jinwu Wang ◽  
Xiaobo Sun ◽  
Yanan Xu ◽  
Qi Wang ◽  
Han Tang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Northeast China ◽  
Yield Loss ◽  
Oryza Sativa L ◽  
Harvest Date ◽  
Rice Cultivars

Regulatory roles of microRNAs in insect pests: prospective targets for insect pest control

2021 ◽  
Vol 70 ◽  
pp. 158-166
Author(s):  
Qiang Zhang ◽  
Wei Dou ◽  
Clauvis Nji Tizi Taning ◽  
Guy Smagghe ◽  
Jin-Jun Wang
Keyword(s):  
Pest Control ◽  
Insect Pests ◽  
Insect Pest ◽  
Insect Pest Control

scholarly journals Quantification of Avoidable Yield Losses in Oilseed Brassica Caused by Insect Pests

2011 ◽  
Vol 51 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Jagdev Kular ◽  
Sarwan Kumar
Keyword(s):  
Seed Yield ◽  
Yield Loss ◽  
Insect Pests ◽  
Block Design ◽  
Maximum Yield ◽  
The Other ◽  
Yield Losses ◽  
Eruca Sativa ◽  
Mustard Aphid ◽  
Randomized Block Design

Quantification of Avoidable Yield Losses in OilseedBrassicaCaused by Insect PestsA six year field study was conducted from 2001-2002 to 2006-2007 at Punjab Agricultural University, Ludhiana, India to study the losses in seed yield of differentBrassicaspecies (B. juncea, B. napus, B. carinata, B. rapaandEruca sativa) by the infestation of insect pests. The experiment was conducted in two different sets viz. protected/sprayed and unprotected, in a randomized block design, with three replications. Data on the infestation of insect pests, and seed yield were recorded at weekly intervals and at harvest, respectively. The loss in seed yield, due to mustard aphid and cabbage caterpillar, varied from 6.5 to 26.4 per cent.E. sativasuffered the least loss in seed yield and harboured the minimum population of mustard aphid (2.1 aphids/plant) and cabbage caterpillar (2.4 larvae/plant). On the other hand,B. carinatawas highly susceptible to the cabbage caterpillar (26.2 larvae/plant) and suffered the maximum yield loss (26.4%).

scholarly journals Releasing number of Telenomus remus (Nixon) (Hymenoptera: Platygastridae) against Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in corn, cotton and soybean

2013 ◽  
Vol 43 (3) ◽  
pp. 377-382 ◽  
Author(s):  
Aline Farhat Pomari ◽  
Adeney de Freitas Bueno ◽  
Regiane Cristina Oliveira de Freitas Bueno ◽  
Ayres de Oliveiras Menezes Junior ◽  
Augusto Cesar Prado Fernandes Fonseca
Keyword(s):  
Pest Control ◽  
Spodoptera Frugiperda ◽  
Plant Architecture ◽  
Crop Plant ◽  
Phenological Stage ◽  
Phenological Stages ◽  
Quadratic Effect ◽  
Lepidoptera Noctuidae ◽  
Telenomus Remus

Telenomus remus releasing numbers may vary depending on the crop, plant architecture and/or the plant phenological stage. Thus, we examined the number of parasitoids needed for effective pest control of Spodoptera frugiperda on corn, cotton and soybean. In all crops, the parasitism response in relation to increasing numbers of the parasitoids had a quadratic effect. In corn, the maximum parasitism observed was 99.8% and 96.8% at a parasitoid releasing number of 0.231 and 0.264 T. remus females per S. frugiperda egg at phenological stages V4 and V10, respectively. Differently, in cotton and soybean, the highest parasitim were recorded using the highest tested T. remus releasing numbers (0.297 parasitoid per S. frugiperda egg). In cotton, it was 77.8% and 73.1% at the vegetative and reproductive stages, respectively and in soybean, it was 77.3% and 54.4% also at the vegetative and reproductive stages. Thus, the appropriated T. remus releasing number might vary accordingly to the crop and plant phenological stage, being higher for soybean and cotton and lower for corn.

scholarly journals A Way Forward to Combat Insect Pest in Rice

2021 ◽  
Vol 25 (1) ◽  
pp. 1-22
Author(s):  
MP Ali ◽  
B Nessa ◽  
MT Khatun ◽  
MU Salam ◽  
MS Kabir
Keyword(s):  
Yield Loss ◽  
Production Systems ◽  
Insect Pests ◽  
Insect Pest ◽  
Brown Planthopper ◽  
Mobile App ◽  
Rice Production ◽  
Economic Losses ◽  
Pest Species ◽  
Management Options

The damage caused by insect pest is the continual factor for the reduction of rice production. To date, 232 rice insect pest species are identified in Bangladesh and more than 100 species of insects are considered pests in rice production systems globally, but only about 20 - 33 species can cause significant economic loss. The major goal of this study is to explore all the possible ways of developed and proposed technologies for rice insect pests management and minimize economic losses. Insect pests cause 20% average yield loss in Asia where more than 90% of the world's rice is produced. In Bangladesh, outbreak of several insects such as rice hispa, leafroller, gallmidge, stem borers and brown planthopper (BPH) occurs as severe forms. Based on previous reports, yield loss can reach upto 62% in an outbreak situation due to hispa infestation. However, BPH can cause 44% yield loss in severe infestested field. To overcome the outbreaks in odd years and to keep the loss upto 5%, it is necessary to take some preventive measures such as planting of resistant or tolerant variety, stop insecticide spraying at early establishment of rice, establish early warning and forecasting system, avoid cultivation of susceptible variety and following crop rotation. Subsequent quick management options such as insecticidal treatment for specific insect pest should also be broadcasted through variety of information systems. Advanced genomic tool can be used to develop genetically modified insect and plants for sustainable pest management. In addition, to stipulate farmers not use insecticides at early crop stgae and minimize general annualized loss, some interventions including training rice farmers, regular field monitoring, digitalization in correct insect pests identification and their management (example; BRRI rice doctor mobile app), and demonstration in farmers field. Each technology itself solely or combination of two or more or all the packages can combat the insect pests, save natural enemies, harvest expected yield and contribute to safe food production in Bangladesh. Bangladesh Rice J. 25 (1) : 1-22, 2021

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