Seasonal incidence of pod fly (Melanogromyza Obtusa Malloch) and pod bug (Clavigralla Gibbosa Spinola) in short duration pigeon pea

The present study was aimed at observing the incidence pattern of pod fly and pod bug in pigeonpea ecosystem. The experiment was conducted at Agricultural Research Farm, Banaras Hindu University, Varanasi during the kharif season of the year 2010-11.The short duration pigeon pea was infested with the number of insect pests at various stages of crop growth. Out of which the incidence pattern of pod fly M. obtusa and pod bug C. gibbosa was studied. The first appearance of pod fly M. obtusa was noticed in the 42 standard week with a mean population of 0.10 maggot/Plant whose maggot population peaked in 45 standard weeks with a mean population of 0.30 maggot/Plant during year 2010-11. Similarly the first occurrence of pod bug C. gibbosa was recorded in 40 standard weeks with a mean population of 0.03 larvae/Plant which attained the peak during 44 and 45 standard weeks, in both the week themean population was 0.40 larvae/Plant. The incidence of all the insect pests although declined after attainment of their respective peak, but pod bug were noticed in the field till the harvest of the crop. To undertake an effective IPM strategy in pigeonpea crop, location specific information on occurrence and seasonal dynamics of insect pests is indispensible

EVALUATION OF SOME PIGEONPEA GENOTYPES AGAINST MAJOR INSECT PESTS

Pigeonpea genotypes with different levels of resistance to major insect pests were evaluated for their ability to withstand pod and grain damage or recover from damage based on loss in grain yield under field conditions. Among all the genotypes the highest reduction in per cent pod damage was found in case of T-P-1 from 27.5% in unprotected condition to 6% in protected condition. The lowest reduction in per cent pod damage by pod bug was found in the genotype KAWR-92-2E from 10.5% in unprotected condition to 7% damage in protected condition. The highest reduction in per cent pod damage by lepidopterous pod borer was found in case of PDA88-2E, the grain damage under protected condition was less than 3.5% in all the genotypes while, grain damage under unprotected condition was above 10% in all the genotypes. Highest grain yield was recorded in PDA-87-3E (962 kg/ha), followed by KAWR-92-2E (925kg/ha), PDA-892E (870 kg/ha) and PDA-85-5E (814 kg/ha)

EFFECT OF SOWING DATES ON THE TOBACCO CATERPILLAR [Spodoptera litura (FABRICIUS)], POPULATION, LEAF DAMAGE AND YIELD OF GROUNDNUT

The effect of sowing date of groundnut on the population buildup of tobacco caterpillar, Spodoptera litura (Fab.) and its effect on leaf damage (%) and yield was studied at the Agricultural Research Farm of the Banaras Hindu University, Varanasi, Uttar Pradesh, India during rainy season consecutively for three cropping years. The tobacco caterpillar average population and groundnut leaf damage (%) was found maximum in the groundnut crop sown on 20th July followed by 5th July and 20th June during all the three years of study. The first infestation of tobacco caterpillar was observed at 45 days after sowing which disappeared 135 days after sowing. The interaction effect of sowing dates and the periods of observation on the leaf damage was found significant. The yield recorded from groundnut crop sown on 20th June was found maximum while the crop sown on 20th July recorded minimum yield

Abstracts of National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020

This book presents the abstracts of the papers presented to the Online National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020 (RDMPMC-2020) held on 26th and 27th August 2020 organized by the Department of Metallurgical and Materials Science in Association with the Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, India. Conference Title: National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020Conference Acronym: RDMPMC-2020Conference Date: 26–27 August 2020Conference Location: Online (Virtual Mode)Conference Organizer: Department of Metallurgical and Materials Engineering, National Institute of Technology JamshedpurCo-organizer: Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, IndiaConference Sponsor: TEQIP-