The Impact of Abiotic Factors on the Population of Onion Thrips (Thrips Tabaci) in Jhunjhunu During Rabi Season on Onion

Abstract

The current investigation, titled "Seasonal incidence away from Thrips tabaci Lindeman" Thripidae) during the onion harvesting seasons based on Rabi including Kharif,” which was carried out by these Entomological Research Farm away from the Department based on  Entomology, College of Agriculture, Jhunjhunu Agricultural University, Jaipur. During a Rabi season, the incidence based on thrips began within these last week away from February including reached its peak during a 14th Standard Meteorological Week. Within the Kharif season, however, it began within the beginning based on October including gradually increased until it reached its peak during a 39th Standard Meteorological Week.

These population away from thrips gradually increased within February including March before experiencing a sudden decline within May, during Rabi season. Like purpose based on this study acted to investigate a seasonal incidence away from Thrips tabaci on onion by the Department based on Entomology including Laboratory's horticulture farm from November to April (Rabi) 2020-21.Onion acted first affected by thrips within the second week away from February, when there treated 3.59 thrips per plant, including it reached its highest level within a second week based on March, when there treated 39.44 thrips per plant. While, about hunter, Coccinella septumpunctata Linn acted started within these third last away from February (0.11/plant) including came to most extreme within a Third week based on Spring (3.42/plant), from there on, declined including totally vanished within about second week away from April.

The thrips density has proved showed a non-significant strong favor towards the temperature including non-significant non supportive bonding with relative humidity, according to a correlation studies; about population based on thrips including the predator C. septumpunctata treated significantly positively correlated (0.938).

A Indian onion, Allium cepa L, exist a monocotyledonous, cross-pollinated, rabi batch harvest this  grows within three terms, namely, the Kharif, the late-Kharif, including the Rabi arise dealt with biennials as about production away from seeds including as annuals as the bulb. Few states of India such as Madhya Pradesh, Karnataka, Gujrat, Maharashtra and Tamil Nadu along with Bihar arise almost important onion-producing states within India. However, both abiotic including biotic factors affect onion cultivation directly or indirectly. These biotic stress caused by a number away from insect pests, including, exist about most significant obstacle within onion cultivation. thrips, specifically Thrips tabaci Spodoptera litura (Fabricius) cutworms; Helicoverpa armigera (Hubner) head borer; the eriophyid parasite, Aceria tulipae (Keifer); Tetranychus cinnabarinus (Boisduval), a red spider mite, diseases, including weed competition A onion thrips exist thought aslike more significant including essential non hybrid type based above onions.