Spring Populations of the Green Peach Aphid 1 on Peach Trees and the Role of Natural Enemies in Their Control 23

1973 ◽  
Vol 2 (2) ◽  
pp. 186-191 ◽  
Author(s):  
George Tamaki
Keyword(s):  
Natural Enemies ◽  
Green Peach Aphid ◽  
Peach Trees

INSECT DEVELOPMENTAL INHIBITORS: EFFECT OF REDUCTION AND DELAY CAUSED BY JUVENILE HORMONE MIMICS ON THE PRODUCTION OF WINGED MIGRANTS OF MYZUS PERSICAE (HEMIPTERA: APHIDIDAE) ON PEACH TREES

1973 ◽  
Vol 105 (5) ◽  
pp. 761-765 ◽  
Author(s):  
George Tamaki
Keyword(s):  
Juvenile Hormone ◽  
Natural Enemies ◽  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Economic Gain ◽  
Subsequent Reduction ◽  
Peach Trees ◽  
Juvenile Hormone Mimics

AbstractInsect developmental inhibitors applied to colonies of the green peach aphid, Myzus persicae (Sulzer), on peach trees in early May reduced the production of winged migrants as much as 75% and delayed migration for as long as 15 days. However, these compounds affected mainly the alatoid nymphs and not the reproductive adults; therefore, apterous aphids would be available as prey to the natural enemies that are present on peach trees in the spring. A reduction in the number of aphid migrants and a delay in their migration from peach trees would result in a subsequent reduction in the number of aphids produced on diseased secondary hosts and a delay in the migration of these aphids to host crops. In most cases, this would result in an increase in yield and an economic gain to the growers.

scholarly journals SERANGGA dan PERANANNYA DALAM BIDANG PERTANIAN dan KEHIDUPAN

2016 ◽  
Vol 1 (1) ◽  
pp. 18
Author(s):  
Araz Meilin ◽  
Nasamsir .
Keyword(s):  
Natural Enemies ◽  
Positive Role ◽  
Living Thing ◽  
Disease Vector ◽  
Number Of Species ◽  
Negative Role

AbstractThe insect is a group of living thing that have the largest number of species. This article was compiled by aiming literature method studies at informing the negative and positive roles of insects in a farming and life. Some insects have a positive or negative role in agriculture and life. The negative role of insects in agriculture and life as cultivation plant, as a disease vector on the plant, and it cause humand being stickness. The positive role of insect is as pollinators, as a decomposer, as predators or parasitoids, as environment bioindikator, as the producer of the useful materials and beneficial in the field of health. Keywords: insects, vectors, natural enemies, pollinators, decomposer AbstrakSerangga merupakan kelompok makhluk hidup yang memiliki jumlah spesies terbanyak. Tulisan ini disusun dari studi literatur dan bertujuan menginformasikan peran negatif dan positif serangga dalam bidang pertanian dan kehidupan.  Beberapa anggota dari serangga memiliki peranan positif maupun negatif di bidang pertanian dan kehidupan.  Peran negatif serangga dibidang pertanian dan kehidupan adalah sebagai pemakan tumbuhan budidaya, sebagai vektor penyebab penyakit pada tanaman, dan sebagai penyebab penyakit pada manusia. Peran positif serangga adalah sebagai polinator atau penyerbuk, sebagai dekomposer atau pengurai, sebagai predator atau parasitoid (musuh alami), sebagai bioindikator lingkungan, sebagai penghasil bahan-bahan berguna dan bermanfaat  dalam bidang kesehatan. Kata Kunci: serangga, vektor, musuh alami, polinator, dekomposer

scholarly journals BIOLOGICAL CONTROL OF WHITEFLY BY SPECIES OF LADYBUG Delphastus spp.

2020 ◽  
Vol 5 (7) ◽  
Author(s):  
Greissi Tente Giraldi ◽  
Julio César Guerreiro ◽  
Cawana Parrow Augusto ◽  
Thainara Ferreira Alves Pessoa ◽  
Luiz Gustavo Dos Santos ◽  
...  
Keyword(s):  
Biological Control ◽  
Natural Enemies ◽  
Crop Productivity ◽  
Insect Population ◽  
Staple Food ◽  
Active Ingredients ◽  
Pest Population ◽  
Critical Damage

Whitefly complex is one of the most severe pests affecting different crops of significant agricultural interest. It causes critical damage to plants, and hence considerably affect crop productivity and the related commercials. This insect has been managed using insecticides; however, there have been reports of resistance of this insecticide to various active ingredients, making it difficult to reduce this pest’s population. Hence, other ways of handling this insect population have been investigated, including through biological control. Several past studies have reported the existence of natural enemies of the whitefly, including coccinellids such as those belonging to the genus Delphastus have gained much attention. These coccinellids are predators and hence perform the important role of controlling pest population. Moreover, the whitefly is a staple food in certain diets.

Role of Hairy Nightshade in the Transmission of Different Potato virus Y Strains on Solanum tuberosum (L.)

2010 ◽  
Vol 11 (1) ◽  
pp. 38 ◽  
Author(s):  
Felix A. Cervantes ◽  
Juan M. Alvarez
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Green Peach Aphid ◽  
Transmission Rate ◽  
Solanum Tuberosum L ◽  
Macrosiphum Euphorbiae ◽  
Invasive Weed ◽  
Potato Plants ◽  
Tuber Necrosis

The complexity of the Potato virus Y (PVY) (Potyviridae: Potyvirus) pathosystem is affected by the presence of several virus strains that differ in their ability to produce tuber necrosis and by the presence of an alternate host that could increase the amount of inoculum in potato fields. Solanum sarrachoides (Sendtner) is an invasive weed from South America present in Pacific Northwest potato agro-ecosystems. It serves as reservoir of PVY and its most efficient vectors: the green peach aphid, Myzus persicae (Sulzer), and the potato aphid, Macrosiphum euphorbiae (Thomas). The role of S. sarracoides as vector and virus reservoir in PVY epidemiology was investigated through a series of laboratory and greenhouse experiments. We studied the symptoms produced in S. sarracoides upon infection with necrotic and non-necrotic strains of PVY and looked at the percentage of infection and titer accumulation of these strains. PVY infection in S. sarrachoides produced symptoms similar to those produced in PVY-infected potato plants. Mottling and yellowing were the main symptoms of infection observed in S. sarrachoides plants, especially by PVYO and PVYNTN infection. Greenhouse transmission studies revealed that PVY-infected S. sarrachoides increased the transmission rate of PVY necrotic strains by M. persicae. The necrotic strain PVYNTN reached higher titer in S. sarrachoides than in potato plants when compared to PVYO and PVYN:O These findings have broadened our understanding of the role and importance of S. sarrachoides in the PVY epidemiology in the potato ecosystems and could potentially be included in the development or optimization of virus management programs. Accepted for publication 15 March 2010. Published 26 May 2010.

Role of Inland Valleys in the Management of Stem Borers and Their Natural Enemies in Upland Maize Fields in the Humid Forest Zone of Cameroon

2006 ◽  
Vol 35 (2) ◽  
pp. 282-292 ◽  
Author(s):  
Adenirin Chabi-Olaye ◽  
Christian Nolte ◽  
Fritz Schulthess ◽  
Christian Borgemeister
Keyword(s):  
Natural Enemies ◽  
Stem Borers ◽  
Forest Zone ◽  
Humid Forest ◽  
Humid Forest Zone
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