In case of noticing 2-3 bollworms
per trap per night, farmers should apply suitable pesticides after consulting officials.
'This is the reason that the white gold is under severe attack of the whitefly, thrips and pink bollworm
and is turning into black due to subsequent development of sooty mold on affected leaves.
Experts advised farmers to perform pest scouting twice a week and instal 1-2 pheromone traps to monitor pink bollworm
. Attack of Aphid has also been reported from some parts of Balochistan cotton areas and farmers were advised to consult officials for remedial measures.
On Thursday last week, Dr Charles Waturu, a lead scientist of GM cotton in Kenya, said the burden of controlling the bollworm
cotton has become worsened by the reemergence of the mealybug pest.
Field study was carried out from 2014-2016 to investigate the predator prey relationship between chewing insect pests of cotton like as American bollworm
(ABW), pink bollworm
(PBW), spotted bollworm
(SBW) and their predators including seven spotted lady beetle and spiders.
Resultantly being in use for such a long period, the poor bollworm
control is evident in the field and scientists are reporting Bt resistance in bollworms
(Naveed et al., 2014).
Dr Qavi Irshad, deputy director, Research Information Unit of the Agriculture Department, told reporter on Saturday that pink bollworm
goes in winter nap during November and December and its eggs remain present on cotton seeds, branches and dried leafs in the farms and ginning
Mostly in chewing pest pink bollworm
, Pectinophora gossypiella (Saunders) (Gelechiidae: Lepidoptera), American bollworm
, Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera) and spotted bollworms
, Earias spp.
He pointed out that if farmers apply pesticides against pink bollworm
before its attack, it can promote white fly infestation and create resistance in other pests.
Dr M Ishtiaq, Assistant Prof Department of Entomology talked about Pink bollworm
status on Bt cotton according to his survey results.
The pest pressure of the African cotton bollworm
is not mentioned as a key challenge because Bt cotton has been developed targeting this pest.