wheat aphid in pakistan

wheat aphid in pakistan

Pests of Wheat Aphids: Aphids attack on wheat a little before the maturity stages of wheat and directly start eating the grains. In Pakistan, aphids have mostly been controlled by insecticidal applications. Wheat (Triticum aestivum . Due to the recent change in pattern of Rainfall in Pakistan aphids get back to the wheat crop and causes approximately 17-20% damage to the wheat yield. Population was comparatively higher on variety Pir Sabaque-85 (Fig. (Termes obesus), Chrotogonus spp., Eurygaster integriceps Put., Sesamia inferens (Wlk. Wheat being staple food of Pakistan is constantly attacked by major wheat aphid species, Schizaphis graminum (R.), Rhopalosiphum padi (L.) and Sitobion avenae (F.). Its yield as well as production experienced substantial fluctuations during the last some years due to climatic changes. Aphids; Wheat crop; Yield loss. In addition to the lint, cottonseed for oil and meal accounts for 80 percent of the national oilseed production.In 1991-92, cotton was grown over about 2.836 million ha, with gl percent of this area in Punjab. Due to concern on synthetic chemical use in wheat, it is imperative to search for alternative environment- and human- friendly control measures such as botanical pesticides. Aphid eggs hatch on a plant or tree in the spring (February-March) when the weather begins to warm. It spends its entire year on cereals and grasses. Shizaphis graminum (Rodani) is major species in Pakistan (21) with an ample host array of at least 60 plant species including wheat, barley, sorghum and corn (17, 10). L.) is a major crop with largest area under cultivation in Pakistan and plays a significant role in economic stability of the country [1]. It has not been possible to develop varieties that combine satisfactory aphid resistance with good agronomic properties and yielding capacity (Ahmad . NATURAL ENEMIES OF APHIDS ON WINTER WHEAT 507 (Fig. Wheat aphids were deliberately exposed to the above botanical extracts and then the number of live and dead aphids was counted in meter square ring on tagged spikelet's. Colonies of wingless aphids develop on the flag and upper leaves of cereals then move to emerging ears, especially on wheat. Several kinds of aphids infest wheat in Pakistan. avenae are the major aphid species of wheat in Pakistan, which cause huge yield losses in wheat crop. Department of Entomology, China Agricultural University, 100193 Beijing-China 2. Females mature and start to feed on their host plant and reproduce. Hashmi et al (8) found four species of aphid damaging the wheat crop (viz; Sitobion avenae (F.) Schizaphis graminum Round), Rhopalosiphum rufiabdominalis (Sasaki) and Rhopalosiphum maidis (Fitch).Anonymous (1) reported that Macrosiphum granarium (F.) is a major species causing 100% … The aphid attack started in mid January on the wheat cultivars and increased gradually with the growth of plant. Among cereal crops, wheat (Triticum aestivum L.) is an important staple food for human.Rhopalosiphum maidis, Rhopalosiphum padi, Schizaphis graminum and Sitobian avenae are the major aphid species of wheat in Pakistan, which cause huge yield losses in wheat crop. The grain aphid is considered a major pest for wheat and a moderate pest for barley. The mortality response of said pest was find out in (2013) and Wains et al. Russian wheat aphid is most often found in low humidity areas with moderate drought stress (Anonymous, 1992). A better knowledge of landscape scale spatial distribution of aphids and their natural enemies could be used to improve integrated pest management programs. Among others, natural population of predators and parasitoids fail to manage aphid population to acceptable limits. Wheat aphids are well known pests of the cereal crop -- causing up to 20 to 80% loss of wheat yield, particularly in Pakistan where over 26.3 million tons of wheat was produced in 2017-18 and where wheat accounts for 10 percent of value added in agriculture. There are about 92 species of aphids in Pakistan. Mean spike length, number of grains per spike, 100 . Some of these are serious pests of crucifer crops, vegetables and fruit trees. Stay of aphid population on Wheat is for short time period during which rapid multiplication of aphid occurs (Jarosik et al. Wheat aphids has assumed scary proportions in wheat cultivation in the Pakistan for the last few years. Economically, it earns the largest export revenues. 1C) in the … 2010). Wheat aphids are well known pests of the cereal crop -- causing up to 20 to 80% loss of wheat yield, particularly in Pakistan where over 26.3 million tons of wheat was produced in 2017-18 and where wheat accounts for 10 percent of value added in agriculture. Rhopalosiphum padi is one of the most common wheat inhabiting pest and reduce the crop yield up tò15%. Wheat aphid; Botanical extract; Pakistan INTRODUCTION Plant protection plays an important role in addition to good seed, fertile soil, irrigation water and fertilizer management for maximum production. et al., 1999). (2014) ranking scales, the cultivar Saleem-2000 was found Moderately Susceptible; 8 cultivars including Tatara-97, Zam-2004, FakhreSarhad-99, Barsat-2010, KT-2000, Dera-98, Attahabib-2010, and Daman-98 were found … Aphids damaging the wheat crop in Pakistan are Rhopalosiphum padi (L.) Rhopalosiphum madis F. Schizaphis graminum R. and Sitobion avenae F. (Akhtar et al., 2010). They not only reduce the yield of crops but also serve as vectors of disease. Aphids are major pests of wheat crop in Pakistan inflicting considerable economic losses. Bahawalpur is characterized by low humidity with drought stress. The dominant weeds prevailing in wheat crops were Avena fatua, Chenopodium album, Chenopodium murale, Convolvulus arvensis, Cynodon dactylon, Malva parviflora, Melilotus indica, Medicago denticulata, Phalaris minor and Rumex dentatus. 2003). Aphid attacks the wheat crop in the mid of February, peaks in March and goes on till April. Updated May 4, 2006 by Gary Hein and John Thomas. All the remaining cultivars were highly susceptible to greenbug (DR ≻ 6). Common Name Scientific name Family Order Wheat Aphid Macrosiphum miscanthi Aphididae Homoptera Armyworm Mythimna sepatate Noctuidae Lepidoptera Wheat weevil Tanymecus indicus Curculionidae Coleoptera Wheat Stem Fly Atherigona soccata Muscidae Diptera 2. 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