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In Bahawalnagar, seven hot spots of white fly, Jassid (7), Thrips (3), Mealy Bug (1) and armyworm (3).
Table III.- Means for population reduction percentage of jassid Amrasca devastans at 3 and 7 days post treatment after 1st, 2nd and 3rd application of different insecticides.
For non-chemical techniques to save crop from pests, farmers need to cut old cotton sticks from ground level and then plough the field to destroy their roots to plug chances of infestation of white fly, thrips and Jassid. Water courses and boundary of fields should be free from weeds so that pests could not feed on them.
The data of thrips, jassid, and whitefly and their natural enemies' form each plot were recorded 24 hours before and 24, 72 hours and 7 days after spray ofinsecticides from 5 randomly selected plants.
Jassid is polyphagus, much devastating and creates a considerable loss to the crop not only by sucking the cell sap but also by inducing toxic materials into the leaves, which cause a 4.45% reduction in the cotton yield (Bhat et al., 1986).
Screening of Brinjal (Solanum melongena L.) Varieties Sown in Autumn for Resistance to Cotton Jassid, Amrasca bigutulla bigutulla (Ishida).
Laboratory studies were conducted to investigate the toxic, deterrent and anti-feedent effects of neem oil and neem seed water extract at 1, 2, and 3% concentrations against jassids, (Emrasca devastans Dist.) cotton mealybug (Phenacoccus solenopsis Tinsley) and their side effects on the feeding potential of Chrysoperla carneaon cotton aphid (Aphis gossypii Kalten) at 27+-2degC and 65% R.H.
In Punjab there have been reports of some pest incidences of whitefly, Jassid, thrips and pink bollworm in some cotton growing districts.
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).
In case of observing of 4-5 whitefly adults or Pupae on a leaf, on average, or attack of Jassid, farmers should apply spray of suitable pesticide after consulting experts.
Talking to reporter here on Monday, he said that white fly attacks on cotton crop in the Punjab had reduced from 17 percent to 12 percent, where as Jassid 13 percent against 15 percent of the last year.
Talking to APP here on Tuesday, he said that white fly attacks on cotton crop in the Punjab had reduced from 17 percent to 12 percent, where as jassid 13 percent against 15 percent of the last year.
Different plant protection measures by spray of insecticides/pesticides were carried out throughout the cropgrowing to control or minimize the sucking (thrips, jassid, whitefly, aphid) and bollworm (heliothious, spotted, pink and army bollworms) insect pests.
Latter on small pres like aphid, Jassid, whiteflies, fruit flies and large prey like mosquitoes, house flies, honey bees, grasshopper were meshed and then given to these young ones for their survival and their molting was also observed till adult.
Uhler, "Remarks on a new form of jassid," American Entomologist, vol.
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