Status of Invasive Species of Thrips, Thrips Parvispinus (Karny) Infesting Chilli and Investigation Studies on IPDM Package in Dharmapuri Districts, Tamil Nadu, India
Sasikumar K
Regional Research Station, Paiyur, Tamil Nadu Agricultural University, 635112, India.
Deivamani M *
ICAR Krishi Vigyan Kendra, Papparapaty 636809, India.
Govindan K
Regional Research Station, Paiyur, Tamil Nadu Agricultural University, 635112, India.
Senthilkumar P
Regional Research Station, Paiyur, Tamil Nadu Agricultural University, 635112, India.
Aneesa Rani M.S
Horticultural College and Research Instititue, Paiyur 635112, India.
Usharani S
Kumaraguru Institute of Agriculture, Erode, 638315, India.
*Author to whom correspondence should be addressed.
Abstract
Roving survey results revealed that mean population of thrips, mite population and tospovirus incidence was recorded to be 1.63, 0.68 & 2.05 and 1.88, 0.74 & 1.57 in Pennagaram and Palacode blocks. In the field experiments, mean population in the module I IPDM module was recorded low thrips population (1.05 nos./leaf and 0.64 nos/Sq.m2 leaves) followed by module II IPDM (1.11 Nos./leaf and 0.71nos/Sq.m2 leaves). A virus incidence of 1.0 to 2.0 % was recorded in treatment 2 module II and treatment 3 Farmers practices 2.2 to 9.5 % was observed. The per cent reduction over control of thrips and mite population is highest in T1 followed by T2 and farmer practice (81.70, 80.66 and 56.48 % & 79.61,77.38 and 33.12 %). The percent reduction over control of tospovirus by thrips is highest in T1 IPDM module followed IPDM II than farmer practice (100, 88.88 and 54.40%). The yield of green chilli and BC ratio were found to be high in IPDM module (22.96 t/ha and 3.02) followed by module II IPDM (19.14 t/ha and 2.78) followed by farmer’s practice (13.88 t/ha and 1.49).
Keywords: Chilli, tospovirus incidence, thrips, mite, IPDM modules