Effect of host plant resistance in some cowpea (Vigna unguiculata L.Walp) cultivars on growth and developmental parameters of the flower bud
thrips, Megalurothrip sjostedti (Trybom).
Thus, it is desired to adjust nonlinear models with homoscedastic and heteroscedastic errors in order to evaluate each ground cover system, taking the number of
thrips as response.
The reduction percentage in
thrips population decreased gradually after 96 hrs of spray but remained effective up to one week in all the botanical pesticides.
Asi et al., (2008) proved that imidacloprid showed better results against cotton
thrips with the mortality of 96.12% at 72 hrs after spray.
The bio-insecticides market for
thrips control is projected to reach a value of USD 418.3 million by 2020, growing at a CAGR of 19.7% from 2015 to 2020.
However, in spite of these characteristics and although a highly diverse assemblage of
thrips may be associated with Fabaceae in Brazil (MONTEIRO, 2002), little is known regarding
thrips and these plant species in caatinga-cerrado ecotone vegetation in northeastern Brazil.
Population of
thrips was examined on flowers and leaves, whereas the natural enemies were examined on whole plant of rose at weekly intervals.
Thrips are insects that suck the cell sap, killing the plant slowly.
'Cotton crop is under attack of pests, especially white fly,
thrips and pink bollworm, due to weather conditions and growers' financial incapacity to counter the menace by applying appropriate quantity of pesticides and fertilizers,' Mr Khokhar said, adding the pest attack was so severe that it may drastically cut lint yield.
While, sucking pest like
thrips (
Thrips tabaci), jassid (Amrasca bigutella), cotton aphid (Aphis gossypii), mites (Tetranychide acarira) and white fly (Bemisia tabaci), have also been known to effect non-Bt as well as Bt cotton cultivars (Shah et al., 2017).
Among pests,
thrips (Thysanoptera) stand out among the most important pests associated with mango trees, attacking leaves, inflorescences and fruits (BARBOSA; PARANHOS, 2005).
Thrips are among the primary pests of the watermelon crop in tropical regions, especially Frankliniella schultzei (Trybom) (Thysanoptera: Thripidae) (Morais et al.
